fix(known-hosts): make virtualized grid cards keyboard-focusable

Grid HostItem roots now set data-vault-focus-target + tabIndex like list
mode so VirtualizedHostCollection arrow-key focus works at 30+ hosts.

Co-authored-by: 陈大猫 <binaricat@users.noreply.github.com>

App.tsx

@@ -291,15 +291,11 @@ function App({ settings }: { settings: SettingsState }) {
     draggingSessionId,
     setDraggingSessionId,
     sessionRenameTarget,
-    sessionRenameValue,
-    setSessionRenameValue,
     startSessionRename,
     renameSessionInline,
     submitSessionRename,
     resetSessionRename,
     workspaceRenameTarget,
-    workspaceRenameValue,
-    setWorkspaceRenameValue,
     startWorkspaceRename,
     submitWorkspaceRename,
     resetWorkspaceRename,
@@ -1945,10 +1941,7 @@ function App({ settings }: { settings: SettingsState }) {
     resetWorkspaceRename,
     resolvedTheme,
     sessionRenameTarget,
-    sessionRenameValue,
     setActiveTabId,
-    setSessionRenameValue,
-    setWorkspaceRenameValue,
     settings,
     startSessionRename,
     renameSessionInline,
@@ -1960,8 +1953,7 @@ function App({ settings }: { settings: SettingsState }) {
     toggleConnectionLogSaved,
     updateConnectionLog,
     workspaceRenameTarget,
-    workspaceRenameValue,
-  }), [accentMode, clearUnsavedConnectionLogs, closeLogView, customAccent, deleteConnectionLog, handleEndSessionDrag, handleOpenQuickSwitcher, handleOpenSettings, handleRootContextMenu, handleSyncNowManual, isMacClient, logViews, openLogView, orderedTabsWithEditors, orphanSessionsForShell, reorderWorkTabs, resetSessionRename, resetWorkspaceRename, resolvedTheme, sessionRenameTarget, sessionRenameValue, setActiveTabId, setSessionRenameValue, setWorkspaceRenameValue, settings, startSessionRename, renameSessionInline, startWorkspaceRename, submitSessionRename, submitWorkspaceRename, t, themeById, toggleConnectionLogSaved, updateConnectionLog, workspaceRenameTarget, workspaceRenameValue]);
+  }), [accentMode, clearUnsavedConnectionLogs, closeLogView, customAccent, deleteConnectionLog, handleEndSessionDrag, handleOpenQuickSwitcher, handleOpenSettings, handleRootContextMenu, handleSyncNowManual, isMacClient, logViews, openLogView, orderedTabsWithEditors, orphanSessionsForShell, reorderWorkTabs, resetSessionRename, resetWorkspaceRename, resolvedTheme, sessionRenameTarget, setActiveTabId, settings, startSessionRename, renameSessionInline, startWorkspaceRename, submitSessionRename, submitWorkspaceRename, t, themeById, toggleConnectionLogSaved, updateConnectionLog, workspaceRenameTarget]);
 
   const appDialogsDomain = useMemo(() => ({
     addToWorkspaceDialog,

application/app/AppHostTreeLayer.test.ts

@@ -53,3 +53,8 @@ test('shared host tree forwards work-surface host management callbacks', () => {
   assert.match(hostTreeLayerSource, /onNewHost=\{onNewHost\}/);
   assert.match(hostTreeLayerSource, /onEditHost=\{onEditHost\}/);
 });
+
+test('shared host tree layer is memoized with a custom areEqual', () => {
+  assert.match(hostTreeLayerSource, /memo\(AppHostTreeLayerInner,\s*appHostTreeLayerAreEqual\)/);
+});
+

application/app/AppHostTreeLayer.tsx

@@ -1,4 +1,4 @@
-import React, { useMemo } from 'react';
+import React, { memo, useMemo } from 'react';
 
 import { useActiveTabId } from '../state/activeTabStore';
 import type { EditorTabChrome } from '../state/editorTabStore';
@@ -47,7 +47,33 @@ export function getAppHostTreeLayerStyle(surfaceVisible: boolean): React.CSSProp
   };
 }
 
-export const AppHostTreeLayer: React.FC<AppHostTreeLayerProps> = ({
+function appHostTreeLayerAreEqual(
+  prev: AppHostTreeLayerProps,
+  next: AppHostTreeLayerProps,
+): boolean {
+  return prev.enabled === next.enabled
+    && prev.hosts === next.hosts
+    && prev.customGroups === next.customGroups
+    && prev.groupConfigs === next.groupConfigs
+    && prev.sessions === next.sessions
+    && prev.workspaces === next.workspaces
+    && prev.editorTabs === next.editorTabs
+    && prev.logViews === next.logViews
+    && prev.orderedTabs === next.orderedTabs
+    && prev.accentMode === next.accentMode
+    && prev.currentTerminalTheme === next.currentTerminalTheme
+    && prev.customAccent === next.customAccent
+    && prev.followAppTerminalTheme === next.followAppTerminalTheme
+    && prev.hostById === next.hostById
+    && prev.themeById === next.themeById
+    && prev.resolveSessionAppearance === next.resolveSessionAppearance
+    && prev.onConnect === next.onConnect
+    && prev.onNewHost === next.onNewHost
+    && prev.onEditHost === next.onEditHost
+    && prev.onCreateLocalTerminal === next.onCreateLocalTerminal;
+}
+
+const AppHostTreeLayerInner: React.FC<AppHostTreeLayerProps> = ({
   enabled,
   hosts,
   customGroups,
@@ -154,3 +180,6 @@ export const AppHostTreeLayer: React.FC<AppHostTreeLayerProps> = ({
     </div>
   );
 };
+
+export const AppHostTreeLayer = memo(AppHostTreeLayerInner, appHostTreeLayerAreEqual);
+AppHostTreeLayer.displayName = 'AppHostTreeLayer';

application/app/AppView.tsx

@@ -1,5 +1,5 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import React, { Suspense, lazy, memo, useCallback, useEffect, useMemo } from 'react';
+import React, { Suspense, lazy, memo, useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { AlertTriangle, Download, Trash2 } from 'lucide-react';
 import { activeTabStore, toEditorTabId, useIsEditorTabActive } from '../state/activeTabStore';
 import { editorTabStore } from '../state/editorTabStore';
@@ -12,7 +12,7 @@ import { QuickScriptEditorDialog } from '../../components/scripts/QuickScriptEdi
 import { AddToWorkspaceDialog } from '../../components/workspace/AddToWorkspaceDialog';
 import { KeyboardInteractiveModal } from '../../components/KeyboardInteractiveModal';
 import { PassphraseModal } from '../../components/PassphraseModal';
-import { UnsavedChangesProvider } from '../../components/editor/UnsavedChangesDialog';
+import { UnsavedChangesProvider, promptUnsavedChanges } from '../../components/editor/UnsavedChangesDialog';
 import { SnippetExecutionProvider } from '../../components/SnippetExecutionProvider';
 import { Button } from '../../components/ui/button';
 import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '../../components/ui/dialog';
@@ -66,6 +66,68 @@ const TextEditorTabFallback = ({ tabId }: { tabId: string }) => {
   );
 };
 
+/** Local draft so keystrokes do not rebuild App chrome domain every character. */
+function RenameDraftDialog({
+  open,
+  inputId,
+  initialName,
+  title,
+  nameLabel,
+  placeholder,
+  cancelLabel,
+  saveLabel,
+  onCancel,
+  onSave,
+}: {
+  open: boolean;
+  inputId: string;
+  initialName: string;
+  title: string;
+  nameLabel: string;
+  placeholder: string;
+  cancelLabel: string;
+  saveLabel: string;
+  onCancel: () => void;
+  onSave: (name: string) => void;
+}) {
+  const [draft, setDraft] = useState(initialName);
+  useEffect(() => {
+    if (open) setDraft(initialName);
+  }, [open, initialName]);
+
+  return (
+    <Dialog open={open} onOpenChange={(nextOpen) => {
+      if (!nextOpen) onCancel();
+    }}>
+      <DialogContent className="max-w-sm">
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+        </DialogHeader>
+        <div className="space-y-2 py-2">
+          <Label htmlFor={inputId}>{nameLabel}</Label>
+          <Input
+            id={inputId}
+            value={draft}
+            onChange={(e) => setDraft(e.target.value)}
+            onKeyDown={(e) => {
+              if (e.key !== 'Enter') return;
+              if (!draft.trim()) return;
+              onSave(draft);
+            }}
+            autoFocus
+            placeholder={placeholder}
+          />
+        </div>
+        <DialogFooter>
+          <Button variant="ghost" onClick={onCancel}>{cancelLabel}</Button>
+          <Button onClick={() => onSave(draft)} disabled={!draft.trim()}>{saveLabel}</Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
+
 export type AppViewProps = {
   domains: AppViewDomains;
 };
@@ -127,14 +189,14 @@ function AppViewInner({ domains }: AppViewProps) {
     keyBindings, keyboardInteractiveQueue, keys, logViews, managedSources, navigateToSection, noteGroups, notes, openLogView, openNoteRequest, orderedTabsWithEditors, orphanSessions,
     passphraseQueue, protocolSelectHost, proxyProfiles, portForwardingRules, quickResults, quickSearch, removeSessionFromWorkspace, reorderWorkTabs, reorderWorkspaceSessions,
     resolveEmptyVaultConflict, resolvedTheme, resolveSessionAppearance, runSnippet, sessionLogsDir, sessionLogsEnabled, sessionLogsFormat, sessionLogsTimestampsEnabled, sessionRenameTarget, sshDebugLogsEnabled,
-    sessionRenameValue, sessions, setActiveTabId, setDeepLinkHostDraft, setDraggingSessionId, setEditorWordWrap,
-    setNavigateToSection, setSessionRenameValue, setTerminalFontFamilyId, setTerminalFontSize, setVaultFocusRequest, updateSessionFontSize, updateSessionRestoreCwd, updateSessionDynamicTitle, updateSessionCodingCliProvider, clearSessionFontSizeOverride,
-    setWorkspaceFocusedSession, setWorkspaceRenameValue, settings, sftpAutoOpenSidebar, sftpFollowTerminalCwd, setSftpFollowTerminalCwd, sftpAutoSync, sftpDefaultViewMode, sftpDoubleClickBehavior,
+    sessions, setActiveTabId, setDeepLinkHostDraft, setDraggingSessionId, setEditorWordWrap,
+    setNavigateToSection, setTerminalFontFamilyId, setTerminalFontSize, setVaultFocusRequest, updateSessionFontSize, updateSessionRestoreCwd, updateSessionDynamicTitle, updateSessionCodingCliProvider, clearSessionFontSizeOverride,
+    setWorkspaceFocusedSession, settings, sftpAutoOpenSidebar, sftpFollowTerminalCwd, setSftpFollowTerminalCwd, sftpAutoSync, sftpDefaultViewMode, sftpDoubleClickBehavior,
     sftpShowHiddenFiles, sftpUseCompressedUpload, snippetPackages, snippets, splitSessionWithCurrentShell, startSessionRename,
     startWorkspaceRename, submitSessionRename, submitWorkspaceRename, t, terminalFontFamilyId, terminalFontSize, terminalSettings, terminalThemeId, themeById,
     toggleBroadcast, toggleConnectionLogSaved, toggleScriptsSidePanelRef, toggleSidePanelRef, toggleWorkspaceViewMode, unmanageSource, updateConnectionLog,
     readPersistedHosts, readPersistedManagedSources, updateCustomGroups, updateGroupConfigs, updateHostDistro, updateHosts, updateIdentities, updateKeys, updateKnownHosts, updateManagedSources,
-    updateNoteGroups, updateNotes, updateProxyProfiles, updateSnippetPackages, updateSnippets, updateSplitSizes, updateTerminalSetting, vaultFocusRequest, workspaceRenameTarget, workspaceRenameValue, workspaces,
+    updateNoteGroups, updateNotes, updateProxyProfiles, updateSnippetPackages, updateSnippets, updateSplitSizes, updateTerminalSetting, vaultFocusRequest, workspaceRenameTarget, workspaces,
     VaultViewContainer, SftpViewMount, TerminalLayerMount, LogViewWrapper,
   } = ctx;
 
@@ -211,6 +273,70 @@ function AppViewInner({ domains }: AppViewProps) {
     pluginViewTabStore.close(tabId);
   }, [orderedTabsWithEditors]);
 
+  const orderedTabsWithEditorsRef = useRef(orderedTabsWithEditors);
+  orderedTabsWithEditorsRef.current = orderedTabsWithEditors;
+
+  // Stable for TopTabs memo: read ordered tabs via ref; prompt via module singleton.
+  const handleRequestCloseEditorTab = useCallback(async (id: string): Promise<boolean> => {
+    const tab = editorTabStore.getTab(id);
+    if (!tab) return false;
+
+    const closeEditorAndActivateNeighbor = () => {
+      const closingTabId = toEditorTabId(id);
+      const list = orderedTabsWithEditorsRef.current;
+      const idx = list.indexOf(closingTabId);
+      releaseEditorTabSaveCoordinator(id);
+      editorTabStore.close(id);
+      if (activeTabStore.getActiveTabId() !== closingTabId) return;
+      const next = list[idx - 1] ?? list[idx + 1] ?? 'vault';
+      activeTabStore.setActiveTabId(next === closingTabId ? 'vault' : next);
+    };
+
+    const dirty = tab.content !== tab.baselineContent;
+    if (!dirty) {
+      closeEditorAndActivateNeighbor();
+      return true;
+    }
+    const choice = await promptUnsavedChanges(tab.fileName);
+    if (choice === 'cancel') return false;
+    if (choice === 'discard') {
+      closeEditorAndActivateNeighbor();
+      return true;
+    }
+    if (choice === 'save') {
+      const ok = await saveEditorTab(id);
+      if (!ok) {
+        const msg = editorTabStore.getTab(id)?.saveError ?? 'Save failed';
+        toast.error(msg, 'SFTP');
+        return false;
+      }
+      const latest = editorTabStore.getTab(id);
+      if (!latest || latest.content !== latest.baselineContent) return false;
+      closeEditorAndActivateNeighbor();
+      return true;
+    }
+
+    return false;
+  }, []);
+
+  // Keep the hotkey ref current during render so Cmd/Ctrl+W never sees the
+  // App.tsx stub `() => false` between commit and useEffect.
+  handleRequestCloseEditorTabRef.current = handleRequestCloseEditorTab;
+
+  const handleSaveSessionRename = useCallback((name: string) => {
+    if (!sessionRenameTarget) return;
+    if (!name.trim()) return;
+    submitSessionRename(sessionRenameTarget.id, name);
+    resetSessionRename();
+  }, [resetSessionRename, sessionRenameTarget, submitSessionRename]);
+
+  const handleSaveWorkspaceRename = useCallback((name: string) => {
+    if (!workspaceRenameTarget) return;
+    if (!name.trim()) return;
+    submitWorkspaceRename(workspaceRenameTarget.id, name);
+    resetWorkspaceRename();
+  }, [resetWorkspaceRename, submitWorkspaceRename, workspaceRenameTarget]);
+
   useEffect(() => {
     const catalog = buildPluginSettingScopeCatalog({
       hosts,
@@ -224,54 +350,7 @@ function AppViewInner({ domains }: AppViewProps) {
   return (
     <SnippetExecutionProvider>
     <UnsavedChangesProvider>
-      {({ prompt }) => {
-        // Helper: close an editor tab and activate the neighbor (left-preference), or vault.
-        const closeEditorAndActivateNeighbor = (id: string) => {
-          const closingTabId = toEditorTabId(id);
-          const list = orderedTabsWithEditors;
-          const idx = list.indexOf(closingTabId);
-          releaseEditorTabSaveCoordinator(id);
-          editorTabStore.close(id);
-          if (activeTabStore.getActiveTabId() !== closingTabId) return;
-          const next = list[idx - 1] ?? list[idx + 1] ?? 'vault';
-          activeTabStore.setActiveTabId(next === closingTabId ? 'vault' : next);
-        };
-
-        // Real dirty-confirm close handler.
-        const handleRequestCloseEditorTab = async (id: string): Promise<boolean> => {
-          const tab = editorTabStore.getTab(id);
-          if (!tab) return false;
-          const dirty = tab.content !== tab.baselineContent;
-          if (!dirty) {
-            closeEditorAndActivateNeighbor(id);
-            return true;
-          }
-          const choice = await prompt(tab.fileName);
-          if (choice === 'cancel') return false;
-          if (choice === 'discard') {
-            closeEditorAndActivateNeighbor(id);
-            return true;
-          }
-          if (choice === 'save') {
-            const ok = await saveEditorTab(id);
-            if (!ok) {
-              const msg = editorTabStore.getTab(id)?.saveError ?? 'Save failed';
-              toast.error(msg, 'SFTP');
-              return false;
-            }
-            const latest = editorTabStore.getTab(id);
-            if (!latest || latest.content !== latest.baselineContent) return false;
-            closeEditorAndActivateNeighbor(id);
-            return true;
-          }
-
-          return false;
-        };
-
-        // Expose to the hotkey dispatcher (Cmd/Ctrl+W).
-        handleRequestCloseEditorTabRef.current = handleRequestCloseEditorTab;
-
-        return (
+      {() => (
     <div className="flex flex-col h-screen text-foreground font-sans netcatty-shell" data-terminal-appearance-root onContextMenu={handleRootContextMenu}>
       <TopTabs
         theme={resolvedTheme}
@@ -464,8 +543,6 @@ function AppViewInner({ domains }: AppViewProps) {
           identities={identities}
           snippets={snippets}
           snippetPackages={snippetPackages}
-          notes={notes}
-          noteGroups={noteGroups}
           sessions={sessions}
           workspaces={workspaces}
           knownHosts={effectiveKnownHosts}
@@ -529,8 +606,6 @@ function AppViewInner({ domains }: AppViewProps) {
           updateHosts={updateTerminalHosts}
           updateSnippets={updateSnippets}
           updateSnippetPackages={updateSnippetPackages}
-          updateNotes={updateNotes}
-          updateNoteGroups={updateNoteGroups}
           sftpDefaultViewMode={sftpDefaultViewMode}
           sftpDoubleClickBehavior={sftpDoubleClickBehavior}
           sftpAutoSync={sftpAutoSync}
@@ -715,59 +790,32 @@ function AppViewInner({ domains }: AppViewProps) {
         </LazyLoadBoundary>
       )}
 
-      <Dialog open={!!sessionRenameTarget} onOpenChange={(open) => {
-        if (!open) {
-          resetSessionRename();
-        }
-      }}>
-        <DialogContent className="max-w-sm">
-          <DialogHeader>
-            <DialogTitle>{t('dialog.renameSession.title')}</DialogTitle>
-          </DialogHeader>
-          <div className="space-y-2 py-2">
-            <Label htmlFor="session-name">{t('field.name')}</Label>
-            <Input
-              id="session-name"
-              value={sessionRenameValue}
-              onChange={(e) => setSessionRenameValue(e.target.value)}
-              onKeyDown={(e) => { if (e.key === 'Enter') submitSessionRename(); }}
-              autoFocus
-              placeholder={t('placeholder.sessionName')}
-            />
-          </div>
-          <DialogFooter>
-            <Button variant="ghost" onClick={resetSessionRename}>{t('common.cancel')}</Button>
-            <Button onClick={submitSessionRename} disabled={!sessionRenameValue.trim()}>{t('common.save')}</Button>
-          </DialogFooter>
-        </DialogContent>
-      </Dialog>
+      <RenameDraftDialog
+        open={!!sessionRenameTarget}
+        inputId="session-name"
+        initialName={sessionRenameTarget ? (sessionRenameTarget.customName || sessionRenameTarget.hostLabel) : ''}
+        title={t('dialog.renameSession.title')}
+        nameLabel={t('field.name')}
+        placeholder={t('placeholder.sessionName')}
+        cancelLabel={t('common.cancel')}
+        saveLabel={t('common.save')}
+        onCancel={resetSessionRename}
+        onSave={handleSaveSessionRename}
+      />
+
+      <RenameDraftDialog
+        open={!!workspaceRenameTarget}
+        inputId="workspace-name"
+        initialName={workspaceRenameTarget ? workspaceRenameTarget.title : ''}
+        title={t('dialog.renameWorkspace.title')}
+        nameLabel={t('field.name')}
+        placeholder={t('placeholder.workspaceName')}
+        cancelLabel={t('common.cancel')}
+        saveLabel={t('common.save')}
+        onCancel={resetWorkspaceRename}
+        onSave={handleSaveWorkspaceRename}
+      />
 
-      <Dialog open={!!workspaceRenameTarget} onOpenChange={(open) => {
-        if (!open) {
-          resetWorkspaceRename();
-        }
-      }}>
-        <DialogContent className="max-w-sm">
-          <DialogHeader>
-            <DialogTitle>{t('dialog.renameWorkspace.title')}</DialogTitle>
-          </DialogHeader>
-          <div className="space-y-2 py-2">
-            <Label htmlFor="workspace-name">{t('field.name')}</Label>
-            <Input
-              id="workspace-name"
-              value={workspaceRenameValue}
-              onChange={(e) => setWorkspaceRenameValue(e.target.value)}
-              onKeyDown={(e) => { if (e.key === 'Enter') submitWorkspaceRename(); }}
-              autoFocus
-              placeholder={t('placeholder.workspaceName')}
-            />
-          </div>
-          <DialogFooter>
-            <Button variant="ghost" onClick={resetWorkspaceRename}>{t('common.cancel')}</Button>
-            <Button onClick={submitWorkspaceRename} disabled={!workspaceRenameValue.trim()}>{t('common.save')}</Button>
-          </DialogFooter>
-        </DialogContent>
-      </Dialog>
 
       {isCreateWorkspaceOpen && (
         <LazyLoadBoundary name="Create workspace" resetKey="create-workspace">
@@ -871,8 +919,7 @@ function AppViewInner({ domains }: AppViewProps) {
         </DialogContent>
       </Dialog>
     </div>
-        );
-      }}
+      )}
     </UnsavedChangesProvider>
     </SnippetExecutionProvider>
   );

application/app/useAppStartupEffects.ts

@@ -9,7 +9,10 @@ import { sftpTransferCenterStore } from '../state/sftpTransferCenterStore';
 import { resumeTransferWithDedicatedSession } from '../state/sftp/dedicatedTransferResume';
 import { getSftpTransferResourceKeys, globalSftpTransferScheduler } from '../state/sftp/globalTransferScheduler';
 import { hasNewSourceFingerprint } from '../state/sftp/transferProgressMetadata';
-import { STORAGE_KEY_SFTP_TRANSFER_CONCURRENCY } from '../../infrastructure/config/storageKeys';
+import {
+  STORAGE_KEY_AUTO_UPDATE_ENABLED,
+  STORAGE_KEY_SFTP_TRANSFER_CONCURRENCY,
+} from '../../infrastructure/config/storageKeys';
 import type { TransferTask } from '../../domain/models';
 import { isTerminalBootEpochCurrent } from '../../domain/terminalBootEpoch';
 import {
@@ -218,7 +221,7 @@ export function useAppStartupEffects(ctx: StartupEffectsContext) {
     // Skip "update available" toast if auto-download has already started or completed
     if (updateState.autoDownloadStatus !== 'idle') return;
     // Don't show automatic notification when auto-update is disabled
-    if (localStorageAdapter.readString('netcatty_auto_update_enabled_v1') === 'false') return;
+    if (localStorageAdapter.readString(STORAGE_KEY_AUTO_UPDATE_ENABLED) === 'false') return;
     if (updateState.hasUpdate && updateState.latestRelease) {
       const version = updateState.latestRelease.version;
       toast.info(

application/i18n/locales/en/vault.ts

@@ -113,8 +113,6 @@ export const enVaultMessages: Messages = {
   'knownHosts.empty.title': 'No Known Hosts',
   'knownHosts.empty.desc':
     "Known hosts are SSH servers you've connected to before. Import from your system's known_hosts file to get started.",
-  'knownHosts.results.showingLimited':
-    'Showing {shown} of {total} hosts. Use search to find specific hosts.',
   'knownHosts.toast.scanUnavailable': 'System scan is unavailable on this platform.',
   'knownHosts.toast.scanNoFile': 'No system known_hosts file found.',
   'knownHosts.toast.scanNoEntries': 'No usable entries found in known_hosts.',
@@ -450,13 +448,6 @@ export const enVaultMessages: Messages = {
   'settings.tab.sftpFileAssociations': 'SFTP',
   'settings.sftp.transferConcurrency': 'Transfer Concurrency',
   'settings.sftp.transferConcurrency.desc': 'Maximum number of files transferred in parallel for the same endpoint, including folder contents and separately selected files. Higher values may improve speed but can overwhelm some servers.',
-  'settings.sftp.transferPoolIdleTtl': 'Transfer connection keep-alive',
-  'settings.sftp.transferPoolIdleTtl.desc': 'How long dedicated transfer SFTP connections stay warm after idle. Longer values reduce cold-start delay before the next upload or download. Busy transfers are never closed.',
-  'settings.sftp.transferPoolIdleTtl.1m': '1 minute',
-  'settings.sftp.transferPoolIdleTtl.5m': '5 minutes',
-  'settings.sftp.transferPoolIdleTtl.15m': '15 minutes',
-  'settings.sftp.transferPoolIdleTtl.30m': '30 minutes',
-  'settings.sftp.transferPoolIdleTtl.never': 'Until app quit',
   'settings.ssh.transportIdleTtl': 'SSH connection keep-alive',
   'settings.ssh.transportIdleTtl.desc': 'How long a shared SSH connection stays warm after the last terminal, SFTP browse, bulk transfer, or port-forward lease is released. While warm, reconnecting to the same host can skip re-authentication (including MFA). Active sessions and transfers are never closed.',
   'settings.ssh.transportIdleTtl.1m': '1 minute',
@@ -913,30 +904,8 @@ export const enVaultMessages: Messages = {
   'hostDetails.plugin.unavailable': 'The configured provider is unavailable. Configuration is preserved until the plugin is restored.',
   'hostDetails.plugin.useSsh': 'Use SSH instead',
 
-  // Host form (legacy modal)
-  'hostForm.title.edit': 'Edit Host',
-  'hostForm.title.new': 'New Host',
-  'hostForm.desc.edit': 'Update connection details for this host',
-  'hostForm.desc.new': 'Create a new SSH host entry',
-  'hostForm.field.label': 'Label',
-  'hostForm.placeholder.label': 'My Production Server',
-  'hostForm.field.hostname': 'Hostname / IP',
-  'hostForm.placeholder.hostname': '192.168.1.1',
-  'hostForm.field.port': 'Port',
-  'hostForm.field.username': 'Username',
-  'hostForm.field.osType': 'OS Type',
-  'hostForm.placeholder.selectOs': 'Select OS',
-  'hostForm.field.group': 'Group',
-  'hostForm.placeholder.group': 'e.g. AWS, DigitalOcean',
-  'hostForm.field.tags': 'Tags',
-  'hostForm.placeholder.addTag': 'Add a tag...',
-  'hostForm.auth.method': 'Authentication Method',
-  'hostForm.auth.password': 'Password',
-  'hostForm.auth.sshKey': 'SSH Key',
+  // Host form (legacy keys still referenced by TerminalAuthDialog)
   'hostForm.auth.selectKey': 'Select an SSH Key',
-  'hostForm.auth.noKeys': 'No keys available',
-  'hostForm.auth.noKeysHint': 'No SSH keys found in Keychain. Please create one first.',
-  'hostForm.saveHost': 'Save Host',
 
   // Connection logs
   'logs.table.date': 'Date',

application/i18n/locales/ru/vault.ts

@@ -150,8 +150,6 @@ export const ruVaultMessages: Messages = {
   'knownHosts.empty.title': 'Нет известных хостов',
   'knownHosts.empty.desc':
     'Известные хосты — это SSH-серверы, к которым вы подключались раньше. Импортируйте системный файл known_hosts, чтобы начать.',
-  'knownHosts.results.showingLimited':
-    'Показано {shown} из {total} хостов. Используйте поиск, чтобы найти нужные хосты.',
   'knownHosts.toast.scanUnavailable': 'Сканирование системы недоступно на этой платформе.',
   'knownHosts.toast.scanNoFile': 'Системный файл known_hosts не найден.',
   'knownHosts.toast.scanNoEntries': 'В known_hosts не найдено пригодных записей.',
@@ -486,13 +484,6 @@ export const ruVaultMessages: Messages = {
   'settings.tab.sftpFileAssociations': 'SFTP',
   'settings.sftp.transferConcurrency': 'Параллелизм передачи',
   'settings.sftp.transferConcurrency.desc': 'Максимальное число файлов, одновременно передаваемых для одной цели, включая содержимое папок и отдельно выбранные файлы. Большие значения могут ускорить передачу, но перегрузить некоторые серверы.',
-  'settings.sftp.transferPoolIdleTtl': 'Удержание transfer-соединений',
-  'settings.sftp.transferPoolIdleTtl.desc': 'Как долго простаивающие SFTP-соединения пула передачи остаются открытыми. Большее время снижает задержку перед следующей передачей. Активные передачи не закрываются.',
-  'settings.sftp.transferPoolIdleTtl.1m': '1 минута',
-  'settings.sftp.transferPoolIdleTtl.5m': '5 минут',
-  'settings.sftp.transferPoolIdleTtl.15m': '15 минут',
-  'settings.sftp.transferPoolIdleTtl.30m': '30 минут',
-  'settings.sftp.transferPoolIdleTtl.never': 'До выхода из приложения',
   'settings.ssh.transportIdleTtl': 'Удержание SSH-соединений',
   'settings.ssh.transportIdleTtl.desc': 'Как долго общее SSH-соединение остаётся открытым после освобождения последнего lease терминала, SFTP-браузера, пакетной передачи или проброса портов. Пока оно тёплое, повторное подключение к тому же хосту может обойти повторную аутентификацию (включая MFA). Активные сессии и передачи не закрываются.',
   'settings.ssh.transportIdleTtl.1m': '1 минута',
@@ -945,30 +936,8 @@ export const ruVaultMessages: Messages = {
   'hostDetails.plugin.unavailable': 'Настроенный провайдер недоступен. Конфигурация сохранится до восстановления плагина.',
   'hostDetails.plugin.useSsh': 'Использовать SSH',
 
-  // Host form (legacy modal)
-  'hostForm.title.edit': 'Редактировать хост',
-  'hostForm.title.new': 'Новый хост',
-  'hostForm.desc.edit': 'Обновите параметры подключения для этого хоста',
-  'hostForm.desc.new': 'Создайте новую запись SSH-хоста',
-  'hostForm.field.label': 'Метка',
-  'hostForm.placeholder.label': 'Мой production-сервер',
-  'hostForm.field.hostname': 'Имя хоста / IP',
-  'hostForm.placeholder.hostname': '192.168.1.1',
-  'hostForm.field.port': 'Порт',
-  'hostForm.field.username': 'Имя пользователя',
-  'hostForm.field.osType': 'Тип ОС',
-  'hostForm.placeholder.selectOs': 'Выберите ОС',
-  'hostForm.field.group': 'Группа',
-  'hostForm.placeholder.group': 'например, AWS, DigitalOcean',
-  'hostForm.field.tags': 'Теги',
-  'hostForm.placeholder.addTag': 'Добавить тег...',
-  'hostForm.auth.method': 'Метод аутентификации',
-  'hostForm.auth.password': 'Пароль',
-  'hostForm.auth.sshKey': 'SSH-ключ',
+  // Host form (legacy keys still referenced by TerminalAuthDialog)
   'hostForm.auth.selectKey': 'Выберите SSH-ключ',
-  'hostForm.auth.noKeys': 'Нет доступных ключей',
-  'hostForm.auth.noKeysHint': 'В связке ключей не найдено SSH-ключей. Сначала создайте один.',
-  'hostForm.saveHost': 'Сохранить хост',
   'vault.import.plugins.title': 'Импортёры плагинов',
   'vault.import.plugins.loading': 'Создание безопасного предварительного просмотра…',
   'vault.import.plugins.progress': 'Обработано {completed} из {total} {message}',

application/i18n/locales/zh-CN/core.ts

@@ -732,7 +732,6 @@ export const zhCNCoreMessages: Messages = {
   'knownHosts.empty.title': '暂无已知主机',
   'knownHosts.empty.desc':
     'Known Hosts 是你之前连接过的 SSH server。导入系统的 known_hosts 文件以开始。',
-  'knownHosts.results.showingLimited': '显示 {shown}/{total} 个主机。使用搜索查找特定主机。',
   'knownHosts.toast.scanUnavailable': '当前平台无法扫描系统 known_hosts。',
   'knownHosts.toast.scanNoFile': '未找到系统 known_hosts 文件。',
   'knownHosts.toast.scanNoEntries': 'known_hosts 中没有可用条目。',

application/i18n/locales/zh-CN/terminal.ts

@@ -93,13 +93,6 @@ export const zhCNTerminalMessages: Messages = {
   'settings.tab.sftpFileAssociations': 'SFTP',
   'settings.sftp.transferConcurrency': '传输并发数',
   'settings.sftp.transferConcurrency.desc': '同一目标同时传输的文件数量上限，包括文件夹内文件和单独多选的文件。较高的值可能提高速度，但可能导致某些服务器过载。',
-  'settings.sftp.transferPoolIdleTtl': '传输连接保活时间',
-  'settings.sftp.transferPoolIdleTtl.desc': '专用传输 SFTP 连接空闲多久后关闭。时间更长可减少下次上传/下载的冷启动等待；进行中的传输不会被关闭。',
-  'settings.sftp.transferPoolIdleTtl.1m': '1 分钟',
-  'settings.sftp.transferPoolIdleTtl.5m': '5 分钟',
-  'settings.sftp.transferPoolIdleTtl.15m': '15 分钟',
-  'settings.sftp.transferPoolIdleTtl.30m': '30 分钟',
-  'settings.sftp.transferPoolIdleTtl.never': '直到退出应用',
   'settings.ssh.transportIdleTtl': 'SSH 连接保活时间',
   'settings.ssh.transportIdleTtl.desc': '最后一个终端、SFTP 浏览、批量传输或端口转发释放后，共享 SSH 连接再保留多久。保留期间再次打开同主机可跳过重新认证（含 MFA）；进行中的会话与传输不会被关闭。',
   'settings.ssh.transportIdleTtl.1m': '1 分钟',

application/i18n/locales/zh-CN/vault.ts

@@ -331,29 +331,8 @@ export const zhCNVaultMessages: Messages = {
   'hostDetails.plugin.useSsh': '改用 SSH',
 
   // Host form (legacy modal)
-  'hostForm.title.edit': '编辑主机',
-  'hostForm.title.new': '新建主机',
-  'hostForm.desc.edit': '更新该主机的连接信息',
-  'hostForm.desc.new': '创建一个新的 SSH 主机条目',
-  'hostForm.field.label': '名称',
-  'hostForm.placeholder.label': 'My Production Server',
-  'hostForm.field.hostname': 'Hostname / IP',
-  'hostForm.placeholder.hostname': '192.168.1.1',
-  'hostForm.field.port': '端口',
-  'hostForm.field.username': '用户名',
-  'hostForm.field.osType': '操作系统类型',
-  'hostForm.placeholder.selectOs': '选择操作系统',
-  'hostForm.field.group': '分组',
-  'hostForm.placeholder.group': '例如：AWS、DigitalOcean',
-  'hostForm.field.tags': '标签',
-  'hostForm.placeholder.addTag': '添加标签…',
-  'hostForm.auth.method': '认证方式',
-  'hostForm.auth.password': '密码',
-  'hostForm.auth.sshKey': 'SSH密钥',
+  // Host form (legacy keys still referenced by TerminalAuthDialog)
   'hostForm.auth.selectKey': '选择 SSH密钥',
-  'hostForm.auth.noKeys': '暂无密钥',
-  'hostForm.auth.noKeysHint': '钥匙串中未找到 SSH密钥，请先创建一个。',
-  'hostForm.saveHost': '保存主机',
 
   // Connection logs
   'logs.table.date': '日期',

application/i18n/locales/zh-TW/core.ts

@@ -732,7 +732,6 @@ export const zhTWCoreMessages: Messages = {
   'knownHosts.empty.title': '暫無已知主機',
   'knownHosts.empty.desc':
     'Known Hosts 是你之前連線過的 SSH server。匯入系統的 known_hosts 檔案以開始。',
-  'knownHosts.results.showingLimited': '顯示 {shown}/{total} 個主機。使用搜索查詢特定主機。',
   'knownHosts.toast.scanUnavailable': '目前平台無法掃描系統 known_hosts。',
   'knownHosts.toast.scanNoFile': '未找到系統 known_hosts 檔案。',
   'knownHosts.toast.scanNoEntries': 'known_hosts 中沒有可用條目。',

application/i18n/locales/zh-TW/terminal.ts

@@ -93,13 +93,6 @@ export const zhTWTerminalMessages: Messages = {
   'settings.tab.sftpFileAssociations': 'SFTP',
   'settings.sftp.transferConcurrency': '傳輸併發數',
   'settings.sftp.transferConcurrency.desc': '同一目標同時傳輸的檔案數量上限，包括資料夾內檔案和單獨多選的檔案。較高的值可能提高速度，但可能導致某些伺服器過載。',
-  'settings.sftp.transferPoolIdleTtl': '傳輸連線保活時間',
-  'settings.sftp.transferPoolIdleTtl.desc': '專用傳輸 SFTP 連線閒置多久後關閉。時間更長可減少下次上傳/下載的冷啟動等待；進行中的傳輸不會被關閉。',
-  'settings.sftp.transferPoolIdleTtl.1m': '1 分鐘',
-  'settings.sftp.transferPoolIdleTtl.5m': '5 分鐘',
-  'settings.sftp.transferPoolIdleTtl.15m': '15 分鐘',
-  'settings.sftp.transferPoolIdleTtl.30m': '30 分鐘',
-  'settings.sftp.transferPoolIdleTtl.never': '直到結束應用',
   'settings.ssh.transportIdleTtl': 'SSH 連線保活時間',
   'settings.ssh.transportIdleTtl.desc': '最後一個終端、SFTP 瀏覽、批次傳輸或連接埠轉發釋放後，共享 SSH 連線再保留多久。保留期間再次開啟同主機可略過重新驗證（含 MFA）；進行中的工作階段與傳輸不會被關閉。',
   'settings.ssh.transportIdleTtl.1m': '1 分鐘',

application/i18n/locales/zh-TW/vault.ts

@@ -331,29 +331,8 @@ export const zhTWVaultMessages: Messages = {
   'hostDetails.plugin.useSsh': '改用 SSH',
 
   // Host form (legacy modal)
-  'hostForm.title.edit': '編輯主機',
-  'hostForm.title.new': '新建主機',
-  'hostForm.desc.edit': '更新該主機的連線資訊',
-  'hostForm.desc.new': '建立一個新的 SSH 主機條目',
-  'hostForm.field.label': '名稱',
-  'hostForm.placeholder.label': 'My Production Server',
-  'hostForm.field.hostname': 'Hostname / IP',
-  'hostForm.placeholder.hostname': '192.168.1.1',
-  'hostForm.field.port': '埠',
-  'hostForm.field.username': '使用者名稱',
-  'hostForm.field.osType': '作業系統型別',
-  'hostForm.placeholder.selectOs': '選擇作業系統',
-  'hostForm.field.group': '分組',
-  'hostForm.placeholder.group': '例如：AWS、DigitalOcean',
-  'hostForm.field.tags': '標籤',
-  'hostForm.placeholder.addTag': '新增標籤…',
-  'hostForm.auth.method': '認證方式',
-  'hostForm.auth.password': '密碼',
-  'hostForm.auth.sshKey': 'SSH金鑰',
+  // Host form (legacy keys still referenced by TerminalAuthDialog)
   'hostForm.auth.selectKey': '選擇 SSH金鑰',
-  'hostForm.auth.noKeys': '暫無金鑰',
-  'hostForm.auth.noKeysHint': '鑰匙串中未找到 SSH金鑰，請先建立一個。',
-  'hostForm.saveHost': '儲存主機',
 
   // Connection logs
   'logs.table.date': '日期',

application/state/aiPanelDiagnostics.ts

@@ -0,0 +1,85 @@
+import type React from 'react';
+import {
+  STORAGE_KEY_AI_PANEL_DIAGNOSTIC_HIDE,
+  STORAGE_KEY_AI_PANEL_DIAGNOSTIC_PROFILE,
+} from '../../infrastructure/config/storageKeys';
+import { localStorageAdapter } from '../../infrastructure/persistence/localStorageAdapter';
+
+export const AI_PANEL_DIAGNOSTIC_HIDE_KEY = STORAGE_KEY_AI_PANEL_DIAGNOSTIC_HIDE;
+export const AI_PANEL_DIAGNOSTIC_PROFILE_KEY = STORAGE_KEY_AI_PANEL_DIAGNOSTIC_PROFILE;
+export const AI_PANEL_FORCE_HIDE_ALL_CONTENT = false;
+export const AI_PANEL_FORCE_HIDE_SHELL = false;
+
+export type AIPanelDiagnosticPart =
+  | 'all'
+  | 'attachments'
+  | 'header'
+  | 'history'
+  | 'input'
+  | 'markdown'
+  | 'messages'
+  | 'recent'
+  | 'toolcalls';
+
+function readLocalStorageValue(key: string): string {
+  try {
+    return localStorageAdapter.readString(key) ?? '';
+  } catch {
+    return '';
+  }
+}
+
+export function getAIPanelDiagnosticHiddenParts(): ReadonlySet<string> {
+  if (AI_PANEL_FORCE_HIDE_ALL_CONTENT) {
+    return new Set(['all']);
+  }
+  const raw = readLocalStorageValue(AI_PANEL_DIAGNOSTIC_HIDE_KEY);
+  return new Set(
+    raw
+      .split(',')
+      .map((part) => part.trim().toLowerCase())
+      .filter(Boolean),
+  );
+}
+
+export function isAIPanelDiagnosticPartHidden(
+  part: AIPanelDiagnosticPart,
+  hiddenParts = getAIPanelDiagnosticHiddenParts(),
+): boolean {
+  return hiddenParts.has('all') || hiddenParts.has(part);
+}
+
+export function isAIPanelDiagnosticsProfilingEnabled(): boolean {
+  const raw = readLocalStorageValue(AI_PANEL_DIAGNOSTIC_PROFILE_KEY).trim().toLowerCase();
+  return raw === '1' || raw === 'true' || raw === 'yes' || raw === 'on';
+}
+
+export function logAIPanelProfiler(
+  id: string,
+  phase: 'mount' | 'update' | 'nested-update',
+  actualDuration: number,
+  baseDuration: number,
+): void {
+  if (!isAIPanelDiagnosticsProfilingEnabled()) return;
+  console.info(
+    `[AI panel profile] ${id} ${phase}: actual=${actualDuration.toFixed(1)}ms base=${baseDuration.toFixed(1)}ms`,
+  );
+}
+
+export function profileAIPanelCalculation<T>(label: string, calculate: () => T): T {
+  if (!isAIPanelDiagnosticsProfilingEnabled()) return calculate();
+  const startedAt = performance.now();
+  try {
+    return calculate();
+  } finally {
+    const elapsed = performance.now() - startedAt;
+    console.info(`[AI panel profile] ${label}: ${elapsed.toFixed(1)}ms`);
+  }
+}
+
+export function getAIPanelProfilerProps(id: string): Pick<React.ProfilerProps, 'id' | 'onRender'> {
+  return {
+    id,
+    onRender: logAIPanelProfiler,
+  };
+}

application/state/appearanceChromeStore.test.ts

@@ -0,0 +1,31 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  getAppearanceChromeSnapshot,
+  publishAppearanceChromeSnapshot,
+  subscribeAppearanceChrome,
+} from './appearanceChromeStore.ts';
+
+test('appearanceChromeStore notifies subscribers only when accent fields change', () => {
+  const events: string[] = [];
+  const unsubscribe = subscribeAppearanceChrome(() => {
+    const snap = getAppearanceChromeSnapshot();
+    events.push(`${snap.accentMode}:${snap.customAccent}`);
+  });
+
+  publishAppearanceChromeSnapshot({ accentMode: 'custom', customAccent: '#ff0000' });
+  assert.equal(events.at(-1), 'custom:#ff0000');
+  assert.equal(getAppearanceChromeSnapshot().customAccent, '#ff0000');
+
+  publishAppearanceChromeSnapshot({ accentMode: 'custom', customAccent: '#ff0000' });
+  assert.equal(events.length, 1);
+
+  publishAppearanceChromeSnapshot({ accentMode: 'custom', customAccent: '#00ff00' });
+  assert.equal(events.at(-1), 'custom:#00ff00');
+
+  publishAppearanceChromeSnapshot({ accentMode: 'theme', customAccent: '#00ff00' });
+  assert.equal(events.at(-1), 'theme:#00ff00');
+
+  unsubscribe();
+});

application/state/appearanceChromeStore.ts

@@ -0,0 +1,68 @@
+import { useSyncExternalStore } from 'react';
+
+type Listener = () => void;
+
+export type AppearanceChromeSnapshot = {
+  accentMode: 'theme' | 'custom';
+  customAccent: string;
+};
+
+const DEFAULT_SNAPSHOT: AppearanceChromeSnapshot = Object.freeze({
+  accentMode: 'theme',
+  customAccent: '',
+});
+
+/**
+ * External store for app accent chrome so Terminal leaves can apply custom
+ * accent without TerminalLayer rebuilding on every color-picker drag tick.
+ */
+class AppearanceChromeStore {
+  private snapshot: AppearanceChromeSnapshot = DEFAULT_SNAPSHOT;
+  private listeners = new Set<Listener>();
+
+  getSnapshot = (): AppearanceChromeSnapshot => this.snapshot;
+
+  subscribe = (listener: Listener): (() => void) => {
+    this.listeners.add(listener);
+    return () => {
+      this.listeners.delete(listener);
+    };
+  };
+
+  setSnapshot(next: AppearanceChromeSnapshot): void {
+    if (
+      this.snapshot.accentMode === next.accentMode
+      && this.snapshot.customAccent === next.customAccent
+    ) {
+      return;
+    }
+    this.snapshot = next;
+    for (const listener of this.listeners) {
+      listener();
+    }
+  }
+}
+
+export const appearanceChromeStore = new AppearanceChromeStore();
+
+export function publishAppearanceChromeSnapshot(
+  snapshot: AppearanceChromeSnapshot,
+): void {
+  appearanceChromeStore.setSnapshot(snapshot);
+}
+
+export function getAppearanceChromeSnapshot(): AppearanceChromeSnapshot {
+  return appearanceChromeStore.getSnapshot();
+}
+
+export function subscribeAppearanceChrome(listener: Listener): () => void {
+  return appearanceChromeStore.subscribe(listener);
+}
+
+export function useAppearanceChromeStore(): AppearanceChromeSnapshot {
+  return useSyncExternalStore(
+    subscribeAppearanceChrome,
+    getAppearanceChromeSnapshot,
+    getAppearanceChromeSnapshot,
+  );
+}

application/state/notesStore.test.ts

@@ -0,0 +1,101 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  EMPTY_NOTES_SNAPSHOT,
+  getEmptyNotesSnapshot,
+  getNotesActions,
+  getNotesSnapshot,
+  publishNotesSnapshot,
+  registerNotesActions,
+  subscribeNotes,
+  subscribeNotesNoop,
+} from './notesStore.ts';
+
+test('notesStore notifies subscribers only when snapshot identity changes', () => {
+  const events: number[] = [];
+  const unsubscribe = subscribeNotes(() => {
+    events.push(getNotesSnapshot().notes.length);
+  });
+
+  const firstNotes = [{
+    id: 'n1',
+    title: 'One',
+    content: 'body',
+    tags: [],
+    createdAt: 1,
+    updatedAt: 1,
+    order: 1000,
+  }];
+  const firstGroups = ['Ops'];
+  publishNotesSnapshot({ notes: firstNotes, noteGroups: firstGroups });
+  assert.equal(events.at(-1), 1);
+  assert.equal(getNotesSnapshot().notes, firstNotes);
+  assert.equal(getNotesSnapshot().noteGroups, firstGroups);
+
+  publishNotesSnapshot({ notes: firstNotes, noteGroups: firstGroups });
+  assert.equal(events.length, 1);
+
+  const secondNotes = [
+    ...firstNotes,
+    {
+      id: 'n2',
+      title: 'Two',
+      content: 'more',
+      tags: [],
+      createdAt: 2,
+      updatedAt: 2,
+      order: 2000,
+    },
+  ];
+  publishNotesSnapshot({ notes: secondNotes, noteGroups: firstGroups });
+  assert.equal(events.at(-1), 2);
+
+  publishNotesSnapshot({ notes: secondNotes, noteGroups: ['Ops', 'DB'] });
+  assert.equal(events.length, 3);
+  assert.deepEqual(getNotesSnapshot().noteGroups, ['Ops', 'DB']);
+
+  unsubscribe();
+});
+
+test('notesStore gated helpers stay empty and never notify', () => {
+  let called = 0;
+  const unsub = subscribeNotesNoop(() => {
+    called += 1;
+  });
+  publishNotesSnapshot({
+    notes: [{
+      id: 'n1',
+      title: 'One',
+      content: 'body',
+      tags: [],
+      createdAt: 1,
+      updatedAt: 1,
+      order: 1000,
+    }],
+    noteGroups: ['Ops'],
+  });
+  assert.equal(called, 0);
+  assert.equal(getEmptyNotesSnapshot(), EMPTY_NOTES_SNAPSHOT);
+  assert.equal(getEmptyNotesSnapshot().notes.length, 0);
+  unsub();
+});
+
+test('registerNotesActions exposes update handlers', () => {
+  const calls: string[] = [];
+  registerNotesActions({
+    updateNotes: () => {
+      calls.push('notes');
+    },
+    updateNoteGroups: () => {
+      calls.push('groups');
+    },
+  });
+  const actions = getNotesActions();
+  assert.ok(actions);
+  actions!.updateNotes([]);
+  actions!.updateNoteGroups([]);
+  assert.deepEqual(calls, ['notes', 'groups']);
+  registerNotesActions(null);
+  assert.equal(getNotesActions(), null);
+});

application/state/notesStore.ts

@@ -0,0 +1,138 @@
+import { useSyncExternalStore } from 'react';
+
+import type { VaultNote } from '../../domain/models';
+
+type Listener = () => void;
+
+export type NotesSnapshot = {
+  notes: readonly VaultNote[];
+  noteGroups: readonly string[];
+};
+
+export type NotesActions = {
+  updateNotes: (notes: VaultNote[]) => void;
+  updateNoteGroups: (groups: string[]) => void;
+};
+
+const EMPTY_NOTES: readonly VaultNote[] = Object.freeze([]);
+const EMPTY_NOTE_GROUPS: readonly string[] = Object.freeze([]);
+
+export const EMPTY_NOTES_SNAPSHOT: NotesSnapshot = Object.freeze({
+  notes: EMPTY_NOTES,
+  noteGroups: EMPTY_NOTE_GROUPS,
+});
+
+/**
+ * External store for vault notes so Notes / AI side-panel consumers can
+ * subscribe without forcing TerminalLayer re-renders on every note edit.
+ */
+class NotesStore {
+  private snapshot: NotesSnapshot = EMPTY_NOTES_SNAPSHOT;
+  private actions: NotesActions | null = null;
+  private listeners = new Set<Listener>();
+  private actionListeners = new Set<Listener>();
+
+  getSnapshot = (): NotesSnapshot => this.snapshot;
+
+  subscribe = (listener: Listener): (() => void) => {
+    this.listeners.add(listener);
+    return () => {
+      this.listeners.delete(listener);
+    };
+  };
+
+  setSnapshot(next: NotesSnapshot): void {
+    if (
+      this.snapshot.notes === next.notes
+      && this.snapshot.noteGroups === next.noteGroups
+    ) {
+      return;
+    }
+    this.snapshot = next;
+    for (const listener of this.listeners) {
+      listener();
+    }
+  }
+
+  getActions = (): NotesActions | null => this.actions;
+
+  subscribeActions = (listener: Listener): (() => void) => {
+    this.actionListeners.add(listener);
+    return () => {
+      this.actionListeners.delete(listener);
+    };
+  };
+
+  setActions(next: NotesActions | null): void {
+    if (this.actions === next) return;
+    this.actions = next;
+    for (const listener of this.actionListeners) {
+      listener();
+    }
+  }
+}
+
+export const notesStore = new NotesStore();
+
+export function publishNotesSnapshot(snapshot: NotesSnapshot): void {
+  notesStore.setSnapshot(snapshot);
+}
+
+export function getNotesSnapshot(): NotesSnapshot {
+  return notesStore.getSnapshot();
+}
+
+export function subscribeNotes(listener: Listener): () => void {
+  return notesStore.subscribe(listener);
+}
+
+/** No-op subscribe for gated (hidden) panel mounts. */
+export function subscribeNotesNoop(_listener: Listener): () => void {
+  return () => {};
+}
+
+export function getEmptyNotesSnapshot(): NotesSnapshot {
+  return EMPTY_NOTES_SNAPSHOT;
+}
+
+export function registerNotesActions(actions: NotesActions | null): void {
+  notesStore.setActions(actions);
+}
+
+export function getNotesActions(): NotesActions | null {
+  return notesStore.getActions();
+}
+
+export function subscribeNotesActions(listener: Listener): () => void {
+  return notesStore.subscribeActions(listener);
+}
+
+const noopUpdateNotes: NotesActions['updateNotes'] = () => {};
+const noopUpdateNoteGroups: NotesActions['updateNoteGroups'] = () => {};
+
+/**
+ * Subscribe to notes catalog + vault mutation actions for Notes / AI panels.
+ */
+export function useNotesStore(): {
+  notes: VaultNote[];
+  noteGroups: string[];
+  updateNotes: NotesActions['updateNotes'];
+  updateNoteGroups: NotesActions['updateNoteGroups'];
+} {
+  const snapshot = useSyncExternalStore(
+    subscribeNotes,
+    getNotesSnapshot,
+    getNotesSnapshot,
+  );
+  const actions = useSyncExternalStore(
+    subscribeNotesActions,
+    getNotesActions,
+    getNotesActions,
+  );
+  return {
+    notes: snapshot.notes as VaultNote[],
+    noteGroups: snapshot.noteGroups as string[],
+    updateNotes: actions?.updateNotes ?? noopUpdateNotes,
+    updateNoteGroups: actions?.updateNoteGroups ?? noopUpdateNoteGroups,
+  };
+}

application/state/sftp/columnLayout.ts

@@ -0,0 +1,32 @@
+export type SortField = "name" | "size" | "modified" | "type";
+export type SortOrder = "asc" | "desc";
+
+export interface ColumnWidths {
+  name: number;
+  modified: number;
+  size: number;
+  type: number;
+}
+
+export type SftpColumnVisibility = Record<keyof ColumnWidths, boolean>;
+
+export const DEFAULT_SFTP_COLUMN_VISIBILITY: SftpColumnVisibility = {
+  name: true,
+  modified: true,
+  size: true,
+  type: true,
+};
+
+export const normalizeSftpColumnVisibility = (value: unknown): SftpColumnVisibility => {
+  if (!value || typeof value !== "object" || Array.isArray(value)) {
+    return DEFAULT_SFTP_COLUMN_VISIBILITY;
+  }
+
+  const stored = value as Partial<Record<keyof ColumnWidths, unknown>>;
+  return {
+    name: true,
+    modified: stored.modified !== false,
+    size: stored.size !== false,
+    type: stored.type !== false,
+  };
+};

application/state/sftp/compressedUploadControl.test.ts

@@ -1,31 +0,0 @@
-import assert from "node:assert/strict";
-import test from "node:test";
-
-import { resumeCompressedUploadSafely } from "./compressedUploadControl.ts";
-
-test("live compressed resume failure stays paused instead of starting a second transfer", async () => {
-  const outcome = await resumeCompressedUploadSafely({
-    transferId: "compressed-live",
-    reconnectRequired: false,
-    resume: async () => ({ success: false, reason: "Upload resume is unavailable" }),
-  });
-  assert.deepEqual(outcome, { kind: "failed", reason: "Upload resume is unavailable" });
-});
-
-test("restored compressed task may restart when its old worker no longer exists", async () => {
-  const outcome = await resumeCompressedUploadSafely({
-    transferId: "compressed-restored",
-    reconnectRequired: true,
-    resume: async () => ({ success: false, reason: "Compression is not active" }),
-  });
-  assert.deepEqual(outcome, { kind: "restart", reason: "Compression is not active" });
-});
-
-test("successful compressed resume rejoins the existing job", async () => {
-  const outcome = await resumeCompressedUploadSafely({
-    transferId: "compressed-live",
-    reconnectRequired: false,
-    resume: async () => ({ success: true }),
-  });
-  assert.deepEqual(outcome, { kind: "resumed" });
-});

application/state/sftp/compressedUploadControl.ts

@@ -1,16 +0,0 @@
-export type CompressedUploadResumeOutcome =
-  | { kind: "resumed" }
-  | { kind: "restart"; reason?: string }
-  | { kind: "failed"; reason: string };
-
-export async function resumeCompressedUploadSafely(params: {
-  transferId: string;
-  reconnectRequired: boolean;
-  resume?: (transferId: string) => Promise<{ success: boolean; reason?: string }>;
-}): Promise<CompressedUploadResumeOutcome> {
-  const result = await (params.resume?.(params.transferId)
-    ?? { success: false, reason: "Resume unavailable" });
-  if (result.success) return { kind: "resumed" };
-  if (params.reconnectRequired) return { kind: "restart", reason: result.reason };
-  return { kind: "failed", reason: result.reason ?? "Could not resume the compressed upload." };
-}

application/state/sftp/localSftpBookmarks.ts

@@ -0,0 +1,83 @@
+import { useCallback, useMemo, useSyncExternalStore } from "react";
+import type { SftpBookmark } from "../../../domain/models";
+import { localStorageAdapter } from "../../../infrastructure/persistence/localStorageAdapter";
+import { STORAGE_KEY_SFTP_LOCAL_BOOKMARKS } from "../../../infrastructure/config/storageKeys";
+import { createSftpBookmark } from "./bookmarkHelpers";
+
+type Listener = () => void;
+
+const listeners = new Set<Listener>();
+
+let snapshot: SftpBookmark[] =
+  localStorageAdapter.read<SftpBookmark[]>(STORAGE_KEY_SFTP_LOCAL_BOOKMARKS) ?? [];
+
+export function subscribeLocalSftpBookmarks(listener: Listener) {
+  listeners.add(listener);
+  return () => {
+    listeners.delete(listener);
+  };
+}
+
+export function getLocalSftpBookmarksSnapshot() {
+  return snapshot;
+}
+
+export function rehydrateLocalSftpBookmarks() {
+  snapshot = localStorageAdapter.read<SftpBookmark[]>(STORAGE_KEY_SFTP_LOCAL_BOOKMARKS) ?? [];
+  for (const listener of listeners) listener();
+}
+
+export function setLocalSftpBookmarks(
+  next: SftpBookmark[] | ((prev: SftpBookmark[]) => SftpBookmark[]),
+) {
+  snapshot = typeof next === "function" ? next(snapshot) : next;
+  localStorageAdapter.write(STORAGE_KEY_SFTP_LOCAL_BOOKMARKS, snapshot);
+  for (const listener of listeners) listener();
+}
+
+if (typeof window !== "undefined") {
+  window.addEventListener("storage", (event) => {
+    if (event.key === STORAGE_KEY_SFTP_LOCAL_BOOKMARKS) {
+      rehydrateLocalSftpBookmarks();
+    }
+  });
+}
+
+interface UseLocalSftpBookmarksParams {
+  currentPath: string | undefined;
+}
+
+export const useLocalSftpBookmarks = ({
+  currentPath,
+}: UseLocalSftpBookmarksParams) => {
+  const bookmarks = useSyncExternalStore(
+    subscribeLocalSftpBookmarks,
+    getLocalSftpBookmarksSnapshot,
+    getLocalSftpBookmarksSnapshot,
+  );
+
+  const isCurrentPathBookmarked = useMemo(
+    () => !!currentPath && bookmarks.some((b) => b.path === currentPath),
+    [currentPath, bookmarks],
+  );
+
+  const toggleBookmark = useCallback(() => {
+    if (!currentPath) return;
+    if (isCurrentPathBookmarked) {
+      setLocalSftpBookmarks((prev) => prev.filter((b) => b.path !== currentPath));
+    } else {
+      setLocalSftpBookmarks((prev) => [...prev, createSftpBookmark(currentPath)]);
+    }
+  }, [currentPath, isCurrentPathBookmarked]);
+
+  const deleteBookmark = useCallback((id: string) => {
+    setLocalSftpBookmarks((prev) => prev.filter((b) => b.id !== id));
+  }, []);
+
+  return {
+    bookmarks,
+    isCurrentPathBookmarked,
+    toggleBookmark,
+    deleteBookmark,
+  };
+};

application/state/sftp/sftpDialogActionStore.ts

@@ -6,7 +6,7 @@
  */
 
 import { useSyncExternalStore, useEffect } from "react";
-import { sftpFocusStore, SftpFocusedSide } from "./useSftpFocusedPane";
+import { sftpFocusStore, SftpFocusedSide } from "./sftpFocusStore";
 
 type SftpDialogActionType = "rename" | "delete" | "newFolder" | "newFile" | null;
 

application/state/sftp/transferPoolIdleTtl.test.ts

@@ -1,25 +0,0 @@
-import assert from "node:assert/strict";
-import test from "node:test";
-
-import {
-  DEFAULT_SFTP_TRANSFER_POOL_IDLE_TTL_MS,
-  isTransferPoolIdleReclaimDisabled,
-  resolveSftpTransferPoolIdleTtlMs,
-} from "../../../infrastructure/config/sftpTransferPool.ts";
-
-test("default pool idle TTL is five minutes", () => {
-  assert.equal(DEFAULT_SFTP_TRANSFER_POOL_IDLE_TTL_MS, 5 * 60_000);
-  assert.equal(resolveSftpTransferPoolIdleTtlMs(() => null), DEFAULT_SFTP_TRANSFER_POOL_IDLE_TTL_MS);
-});
-
-test("accepts preset values including never-reclaim zero", () => {
-  assert.equal(resolveSftpTransferPoolIdleTtlMs(() => 60_000), 60_000);
-  assert.equal(resolveSftpTransferPoolIdleTtlMs(() => 0), 0);
-  assert.equal(resolveSftpTransferPoolIdleTtlMs(() => 123), DEFAULT_SFTP_TRANSFER_POOL_IDLE_TTL_MS);
-});
-
-test("transfer pool idle reclaim helper is deprecated and always reclaim-enabled", () => {
-  // Channels close when idle; SSH park is separate. The helper always returns false.
-  assert.equal(isTransferPoolIdleReclaimDisabled(0), false);
-  assert.equal(isTransferPoolIdleReclaimDisabled(300_000), false);
-});

application/state/sftp/types.ts

@@ -111,9 +111,4 @@ export interface SftpStateOptions {
    * This keeps side-panel tab switches on the already-authenticated SSH transport.
    */
   resolveBrowseSourceSessionId?: (hostId: string, host?: Host) => string | undefined;
-  /**
-   * @deprecated Transfer channels no longer park independently. SSH keep-alive
-   * is controlled by sshTransportIdleTtlMs in settings.
-   */
-  transferPoolIdleTtlMs?: number;
 }

application/state/sftp/useSftpConnections.ts

@@ -2,6 +2,7 @@ import React, { useCallback, useEffect, useRef, useState } from "react";
 import type { MutableRefObject } from "react";
 import { netcattyBridge } from "../../../infrastructure/services/netcattyBridge";
 import type { Host, Identity, KnownHost, SftpConnection, SftpFileEntry, SftpFilenameEncoding, SSHKey } from "../../../domain/models";
+import { createKnownHostFromHostKeyInfo } from "../../../domain/knownHosts";
 import type { SftpHostKeyInfo, SftpHostKeyVerificationState, SftpPane } from "./types";
 import { useSftpDirectoryListing } from "./useSftpDirectoryListing";
 import { useSftpHostCredentials } from "./useSftpHostCredentials";
@@ -206,15 +207,7 @@ const createKnownHostFromSftpHostKeyInfo = (
   hostKeyInfo: SftpHostKeyInfo,
   now = Date.now(),
   idSuffix = Math.random().toString(36).slice(2, 11),
-): KnownHost => ({
-  id: hostKeyInfo.knownHostId || `kh-${now}-${idSuffix}`,
-  hostname: hostKeyInfo.hostname,
-  port: hostKeyInfo.port || 22,
-  keyType: hostKeyInfo.keyType,
-  publicKey: hostKeyInfo.publicKey || `SHA256:${hostKeyInfo.fingerprint}`,
-  fingerprint: hostKeyInfo.fingerprint,
-  discoveredAt: now,
-});
+): KnownHost => createKnownHostFromHostKeyInfo(hostKeyInfo, { now, idSuffix });
 
 export const useSftpConnections = ({
   hosts,

application/state/sftp/useSftpPaneSorting.architecture.test.ts

@@ -0,0 +1,10 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./useSftpPaneSorting.ts", import.meta.url), "utf8");
+
+test("useSftpPaneSorting imports column layout from application state", () => {
+  assert.doesNotMatch(source, /from ["'].*components\//);
+  assert.match(source, /from ["']\.\/columnLayout["']/);
+});

application/state/sftp/useSftpPaneSorting.ts

@@ -6,13 +6,13 @@ import {
   type SftpColumnVisibility,
   type SortField,
   type SortOrder,
-} from "../utils";
+} from "./columnLayout";
 import { STORAGE_KEY_SFTP_VISIBLE_COLUMNS } from "../../../infrastructure/config/storageKeys";
 import {
   LOCAL_STORAGE_ADAPTER_CHANGED_EVENT,
   localStorageAdapter,
 } from "../../../infrastructure/persistence/localStorageAdapter";
-import { useSftpDirectoriesFirst } from "../../../application/state/sftp/useSftpDirectoriesFirst";
+import { useSftpDirectoriesFirst } from "./useSftpDirectoriesFirst";
 
 export interface UseSftpPaneSortingResult {
   sortField: SortField;

application/state/sftp/useSftpTransferLifecycle.ts

@@ -2,25 +2,6 @@ import { useEffect, useLayoutEffect, useRef } from "react";
 
 import { sftpTransferCenterStore } from "../sftpTransferCenterStore";
 
-export function useWarmSftpTransferPool(params: {
-  hostIds: readonly string[];
-  activeHostId?: string;
-  warmTransferPoolForHost?: (hostId: string) => void | Promise<void>;
-}) {
-  const warmRef = useRef(params.warmTransferPoolForHost);
-  warmRef.current = params.warmTransferPoolForHost;
-  const hostIdsKey = [...new Set([
-    ...params.hostIds,
-    ...(params.activeHostId ? [params.activeHostId] : []),
-  ])].sort().join("\u0000");
-
-  useEffect(() => {
-    for (const hostId of hostIdsKey.split("\u0000").filter(Boolean)) {
-      void warmRef.current?.(hostId);
-    }
-  }, [hostIdsKey]);
-}
-
 export function useReportSftpTransferOwnerActivity(params: {
   ownerId: string;
   activeTransfersCount: number;

application/state/sftp/utils.ts

@@ -1,11 +1,13 @@
 import { SftpFileEntry, TransferTask } from "../../../domain/models";
+import { formatBytes } from "../../../domain/formatBytes";
 
 export const formatFileSize = (bytes: number): string => {
-  if (bytes === 0) return "--";
-  const units = ["Bytes", "KB", "MB", "GB", "TB"];
-  const i = Math.floor(Math.log(bytes) / Math.log(1024));
-  const size = bytes / Math.pow(1024, i);
-  return `${size.toFixed(i === 0 ? 0 : 2)} ${units[i]}`;
+  return formatBytes(bytes, {
+    zeroDisplay: "--",
+    includeTB: true,
+    fractionDigits: 2,
+    byteUnit: "Bytes",
+  });
 };
 
 /**

application/state/sftpTransferCenterStore.ts

@@ -2318,7 +2318,7 @@ export function createSftpTransferCenterStore(persistence?: StorePersistence): S
 const browserPersistence: StorePersistence | undefined = typeof globalThis.localStorage === "undefined"
   ? undefined
   : {
-      read: () => globalThis.localStorage.getItem(STORAGE_KEY_SFTP_TRANSFER_CENTER),
+      read: () => localStorageAdapter.readString(STORAGE_KEY_SFTP_TRANSFER_CENTER),
       write: (value) => { localStorageAdapter.writeString(STORAGE_KEY_SFTP_TRANSFER_CENTER, value); },
     };
 

application/state/uiFontStore.ts

@@ -172,15 +172,6 @@ export const useUIFontsLoaded = (): boolean => {
   );
 };
 
-/**
- * Check if a font ID is valid
- */
-export const isValidUiFontId = (fontId: string): boolean => {
-  // Local fonts are always considered valid (they start with 'local-')
-  if (fontId.startsWith('local-')) return true;
-  return uiFontStore.getAvailableFonts().some(f => f.id === fontId);
-};
-
 /**
  * Initialize UI fonts eagerly
  */

application/state/useAIChatStreaming.architecture.test.ts

@@ -0,0 +1,10 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./useAIChatStreaming.ts", import.meta.url), "utf8");
+
+test("useAIChatStreaming imports streaming support from infrastructure", () => {
+  assert.match(source, /from ['"]\.\.\/\.\.\/infrastructure\/ai\/aiChatStreamingSupport['"]/);
+  assert.doesNotMatch(source, /from ['"].*components\//);
+});

application/state/useAIChatStreaming.ts

@@ -15,26 +15,26 @@ import type {
   ExternalAgentConfig,
   ProviderConfig,
   WebSearchConfig,
-} from '../../../infrastructure/ai/types';
-import type { ExecutorContext } from '../../../infrastructure/ai/cattyAgent/executor';
-import { getAgentRuntime } from '../../../infrastructure/ai/harness/globalAgentRuntime';
+} from '../../infrastructure/ai/types';
+import type { ExecutorContext } from '../../infrastructure/ai/cattyAgent/executor';
+import { getAgentRuntime } from '../../infrastructure/ai/harness/globalAgentRuntime';
 import type {
   TurnSteerInput,
   TurnSteerResult,
-} from '../../../infrastructure/ai/harness/turnDrivers/types';
-import { classifyError } from '../../../infrastructure/ai/errorClassifier';
-import { latestAISessionsSnapshot } from '../../../application/state/aiStateSnapshots';
+} from '../../infrastructure/ai/harness/turnDrivers/types';
+import { classifyError } from '../../infrastructure/ai/errorClassifier';
+import { latestAISessionsSnapshot } from './aiStateSnapshots';
 import {
   generateId,
   getNetcattyBridge,
   type DefaultTargetSessionHint,
   type TerminalSessionInfo,
-} from './aiChatStreamingSupport';
+} from '../../infrastructure/ai/aiChatStreamingSupport';
 import { useAgentCompactionUi } from './useAgentCompactionUi';
 
-export { getNetcattyBridge } from './aiChatStreamingSupport';
+export { getNetcattyBridge } from '../../infrastructure/ai/aiChatStreamingSupport';
 export type { ActiveCompactionUi } from './useAgentCompactionUi';
-export type { DefaultTargetSessionHint } from './aiChatStreamingSupport';
+export type { DefaultTargetSessionHint } from '../../infrastructure/ai/aiChatStreamingSupport';
 
 const sharedStreamingSessionIds = new Set<string>();
 const sharedAbortControllers = new Map<string, AbortController>();
@@ -62,7 +62,7 @@ export interface UseAIChatStreamingParams {
   updateMessageById: (sessionId: string, messageId: string, updater: (msg: ChatMessage) => ChatMessage) => void;
   persistContextCompaction?: (
     sessionId: string,
-    compaction: import('../../../infrastructure/ai/types').AISessionContextCompaction,
+    compaction: import('../../infrastructure/ai/types').AISessionContextCompaction,
   ) => void;
 }
 

application/state/useAgentCompactionUi.ts

@@ -1,7 +1,7 @@
 import { useEffect, useState } from 'react';
-import type { ContextPrepareTrigger } from '../../../infrastructure/ai/harness/types';
-import { getAgentRuntime } from '../../../infrastructure/ai/harness/globalAgentRuntime';
-import { CATTY_COMPACTION_STATUS_KEYS } from '../../../infrastructure/ai/harness/compactionStatusKeys';
+import type { ContextPrepareTrigger } from '../../infrastructure/ai/harness/types';
+import { getAgentRuntime } from '../../infrastructure/ai/harness/globalAgentRuntime';
+import { CATTY_COMPACTION_STATUS_KEYS } from '../../infrastructure/ai/harness/compactionStatusKeys';
 
 export interface ActiveCompactionUi {
   sessionId: string;

application/state/useExternalMcpSessionSync.ts

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
 
-import { buildAITerminalSessionInfo } from '../../components/terminalLayer/TerminalLayerSupport';
+import { buildAITerminalSessionInfo } from '../../domain/buildAITerminalSessionInfo';
 import { detectLocalOs } from '../../lib/localShell';
 import type { Host, PortForwardingRule, TerminalSession } from '../../types';
 import { STORAGE_KEY_AI_EXTERNAL_MCP_ENABLED } from '../../infrastructure/config/storageKeys';

application/state/useExternalMcpToggleState.ts

@@ -144,12 +144,26 @@ export function readExternalMcpMode(): ExternalMcpMode {
   return normalizeExternalMcpMode(localStorageAdapter.readString(STORAGE_KEY_AI_EXTERNAL_MCP_MODE));
 }
 
+export function writeExternalMcpMode(mode: ExternalMcpMode): ExternalMcpMode {
+  const normalized = normalizeExternalMcpMode(mode);
+  localStorageAdapter.writeString(STORAGE_KEY_AI_EXTERNAL_MCP_MODE, normalized);
+  emitAIStateChanged(STORAGE_KEY_AI_EXTERNAL_MCP_MODE);
+  return normalized;
+}
+
 export function readExternalMcpIdleTimeoutMinutes(): number {
   return normalizeExternalMcpIdleTimeoutMinutes(
     localStorageAdapter.readNumber(STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES),
   );
 }
 
+export function writeExternalMcpIdleTimeoutMinutes(minutes: number): number {
+  const normalized = normalizeExternalMcpIdleTimeoutMinutes(minutes);
+  localStorageAdapter.writeNumber(STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES, normalized);
+  emitAIStateChanged(STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES);
+  return normalized;
+}
+
 /** Whether host_open should surface/focus the main window. Defaults to true (existing behavior). */
 export function readExternalMcpFocusOnHostOpen(): boolean {
   return localStorageAdapter.readBoolean(STORAGE_KEY_AI_EXTERNAL_MCP_FOCUS_ON_HOST_OPEN) ?? true;
@@ -187,6 +201,13 @@ export function readSessionIdleTimeoutMinutes(): number {
   );
 }
 
+export function writeSessionIdleTimeoutMinutes(minutes: number): number {
+  const normalized = normalizeSessionIdleTimeoutMinutes(minutes);
+  localStorageAdapter.writeNumber(STORAGE_KEY_AI_SESSION_IDLE_TIMEOUT_MINUTES, normalized);
+  emitAIStateChanged(STORAGE_KEY_AI_SESSION_IDLE_TIMEOUT_MINUTES);
+  return normalized;
+}
+
 export function shouldStartExternalMcpOnStartup({
   enabled,
   mode,

application/state/useOutputTriggers.ts

@@ -782,6 +782,9 @@ export function useOutputTriggers({
       resetTriggerScanState();
     },
     schedule: (callback) => {
+      // Prefer setTimeout over rAF: terminal output can continue while the
+      // Electron renderer is hidden/minimized, when rAF is throttled or paused.
+      // Pending scan buffers are capped, so delayed flushes can drop matches.
       const timer = globalThis.setTimeout(callback, OUTPUT_TRIGGER_SCAN_DELAY_MS);
       return () => globalThis.clearTimeout(timer);
     },

application/state/usePortForwardHostKeyVerification.architecture.test.ts

@@ -0,0 +1,10 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./usePortForwardHostKeyVerification.ts", import.meta.url), "utf8");
+
+test("usePortForwardHostKeyVerification stays below the UI layer", () => {
+  assert.doesNotMatch(source, /from ["'].*components\//);
+  assert.match(source, /from ["']\.\.\/\.\.\/domain\/portForwardHostKey["']/);
+});

application/state/usePortForwardHostKeyVerification.ts

@@ -1,7 +1,7 @@
 import { useCallback, useEffect, useState } from "react";
 import type { KnownHost } from "../../domain/models";
 import { netcattyBridge } from "../../infrastructure/services/netcattyBridge";
-import type { HostKeyInfo } from "../../components/terminal/TerminalHostKeyVerification";
+import type { HostKeyInfo } from "../../domain/hostKey";
 import {
   createKnownHostFromPortForwardHostKeyInfo,
   enqueuePortForwardHostKeyVerification,
@@ -9,7 +9,7 @@ import {
   toPendingPortForwardHostKeyVerification,
   type PendingPortForwardHostKeyVerification,
   type PortForwardHostKeyRequest,
-} from "../../components/port-forwarding/hostKeyVerification";
+} from "../../domain/portForwardHostKey";
 
 export interface PortForwardHostKeyVerificationState {
   hostKeyInfo: HostKeyInfo;

application/state/useServerStats.ts

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
-import { netcattyBridge } from '../../../infrastructure/services/netcattyBridge';
+import { netcattyBridge } from '../../infrastructure/services/netcattyBridge';
 
 export interface DiskInfo {
   capacityKey?: string;       // Filesystem or shared-pool identity for deduplication

application/state/useSessionState.ts

@@ -619,17 +619,26 @@ export const useSessionState = ({
     });
   }, []);
 
-  const submitWorkspaceRename = useCallback(() => {
+  const submitWorkspaceRename = useCallback((workspaceId?: string, name?: string) => {
+    if (workspaceId !== undefined && name !== undefined) {
+      const trimmed = name.trim();
+      if (!trimmed) return;
+      setWorkspaces(prev => prev.map(w => (
+        w.id === workspaceId ? { ...w, title: trimmed, autoTitle: false } : w
+      )));
+      return;
+    }
+
     setWorkspaceRenameValue(prevValue => {
-      const name = prevValue.trim();
-      if (!name) return prevValue;
-      
+      const trimmed = prevValue.trim();
+      if (!trimmed) return prevValue;
+
       setWorkspaceRenameTarget(prevTarget => {
         if (!prevTarget) return prevTarget;
-        setWorkspaces(prev => prev.map(w => w.id === prevTarget.id ? { ...w, title: name, autoTitle: false } : w));
+        setWorkspaces(prev => prev.map(w => w.id === prevTarget.id ? { ...w, title: trimmed, autoTitle: false } : w));
         return null;
       });
-      
+
       return '';
     });
   }, []);

application/state/useSettingsState.ts

@@ -1,6 +1,7 @@
 import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState, type SetStateAction } from 'react';
 
 import { runThemeTransition, type ThemeTransitionMode } from './themeTransition';
+import { publishAppearanceChromeSnapshot } from './appearanceChromeStore';
 import { SyncConfig, TerminalSettings, HotkeyScheme, CustomKeyBindings, DEFAULT_KEY_BINDINGS, KeyBinding, UILanguage, SessionLogFormat, normalizeTerminalSettings } from '../../domain/models';
 import {
   DEFAULT_HTTP_NETWORK_PROXY,
@@ -967,6 +968,8 @@ export const useSettingsState = (options: { enableSettingsSync?: boolean; enable
     const persistedAppearanceChanged = previousAppearance === null
       || hasPersistedAppearanceChanged(previousAppearance, appearanceRender);
     previousAppearanceRenderRef.current = appearanceRender;
+    // Terminal leaves subscribe here so accent drag does not rebuild TerminalLayer.
+    publishAppearanceChromeSnapshot({ accentMode, customAccent });
     const tokens = getUiThemeById(resolvedTheme, resolvedTheme === 'dark' ? darkUiThemeId : lightUiThemeId).tokens;
     const apply = () => applyThemeTokens(theme, resolvedTheme, tokens, accentMode, customAccent);
     const transitionMode = appearanceTransitionModeRef.current;
@@ -1841,7 +1844,7 @@ export const useSettingsState = (options: { enableSettingsSync?: boolean; enable
     // Opaque version that changes when any synced setting changes, used by useAutoSync.
     // eslint-disable-next-line react-hooks/exhaustive-deps
     settingsVersion: useMemo(() => Math.random(), [
-      theme, lightUiThemeId, darkUiThemeId, accentMode, customAccent,
+      theme, lightUiThemeId, darkUiThemeId, accentMode,
       uiFontFamilyId, uiLanguage, customCSS,
       terminalThemeId, terminalFontFamilyId, terminalFontSize, terminalSettings,
       customKeyBindings, editorWordWrap,

application/state/useSftpState.ts

@@ -399,14 +399,6 @@ export const useSftpState = (
     [hosts, identities, keys, openPoolSftpSession, transferKnownHosts, transferPoolKeyCache, transferTerminalSettings],
   );
 
-  /**
-   * @deprecated No-op. SSH transport idle park keeps connections warm; opening
-   * a background transfer channel is unnecessary and could re-trigger MFA.
-   */
-  const warmTransferPoolForHost = useCallback(async (_hostId: string) => {
-    // Intentionally empty — unified transport registry owns keep-alive.
-  }, []);
-
   /** True after browse channels were soft-closed while this owner stayed mounted. */
   const browseParkedRef = useRef(false);
   const browseLifecycleGenRef = useRef(0);
@@ -824,7 +816,6 @@ export const useSftpState = (
     rejectHostKeyVerification,
     acceptHostKeyVerification,
     acceptAndSaveHostKeyVerification,
-    warmTransferPoolForHost,
   };
   const methodsRef = useRef(currentMethods);
   methodsRef.current = currentMethods;
@@ -907,8 +898,6 @@ export const useSftpState = (
     rejectHostKeyVerification: () => methodsRef.current.rejectHostKeyVerification(),
     acceptHostKeyVerification: () => methodsRef.current.acceptHostKeyVerification(),
     acceptAndSaveHostKeyVerification: () => methodsRef.current.acceptAndSaveHostKeyVerification(),
-    warmTransferPoolForHost: (...args: Parameters<typeof warmTransferPoolForHost>) =>
-      methodsRef.current.warmTransferPoolForHost(...args),
     activeFileWatchCountRef,
   }), [activeFileWatchCountRef]); // activeFileWatchCountRef is a stable ref
 

application/state/useSystemManager.ts

@@ -1,10 +1,10 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
-import { useI18n } from '../../../application/i18n/I18nProvider';
-import type { I18nContextValue } from '../../../application/i18n/I18nProvider';
-import { sessionCapabilitiesStore } from '../../../application/state/sessionCapabilitiesStore';
-import type { SessionCapabilities } from '../../../domain/systemManager/types';
-import type { useSystemManagerBackend } from '../../../application/state/useSystemManagerBackend';
-import { nextPollData } from '../listStable';
+import { useI18n } from '../i18n/I18nProvider';
+import type { I18nContextValue } from '../i18n/I18nProvider';
+import { sessionCapabilitiesStore } from './sessionCapabilitiesStore';
+import type { SessionCapabilities } from '../../domain/systemManager/types';
+import type { useSystemManagerBackend } from './useSystemManagerBackend';
+import { nextPollData } from '../../domain/systemManager/pollListStable';
 
 type Backend = ReturnType<typeof useSystemManagerBackend>;
 

application/state/useTerminalAiContexts.architecture.test.ts

@@ -0,0 +1,10 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./useTerminalAiContexts.ts", import.meta.url), "utf8");
+
+test("useTerminalAiContexts imports AI context primitives from domain", () => {
+  assert.match(source, /from ['"]\.\.\/\.\.\/domain\/buildAITerminalSessionInfo['"]/);
+  assert.doesNotMatch(source, /from ['"].*components\//);
+});

application/state/useTerminalAiContexts.ts

@@ -2,11 +2,14 @@ import type React from 'react';
 import { useCallback, useMemo, useRef } from 'react';
 
 import { retainStableAiPanelContexts } from '../../domain/aiPanelContextsEqual';
+import {
+  buildAITerminalSessionInfo,
+  type AIPanelContext,
+} from '../../domain/buildAITerminalSessionInfo';
 import { collectSessionIds } from '../../domain/workspace';
 import type { TerminalContextReader } from '../../domain/terminalContextRead';
 import { detectLocalOs } from '../../lib/localShell';
 import type { Host, PortForwardingRule, TerminalSession, Workspace } from '../../types';
-import { buildAITerminalSessionInfo, type AIPanelContext } from './TerminalLayerSupport';
 
 interface UseTerminalAiContextsOptions {
   hosts: Host[];

application/state/useThemeRuntime.ts

@@ -1,4 +1,4 @@
-import { useCallback, useLayoutEffect, useMemo, useState } from 'react';
+import { useCallback, useLayoutEffect, useMemo, useRef, useState } from 'react';
 
 import type { TerminalTheme } from '../../domain/models';
 import {
@@ -42,7 +42,9 @@ export function useThemeRuntime(settings: ThemeRuntimeSettings) {
 
   const [userIntent, setUserIntent] = useState<ThemeUserIntent>(idleThemeUserIntent());
 
-  const appearanceSettings = useMemo((): TerminalAppearanceSettings => ({
+  // Theme-id settings without accent — keeps resolveFocusedAppearance identity
+  // stable during color-picker drag (TerminalLayer memo depends on it).
+  const appearanceSettingsBase = useMemo((): Omit<TerminalAppearanceSettings, 'accentMode' | 'customAccent'> => ({
     terminalThemeId,
     terminalThemeDarkId,
     terminalThemeLightId,
@@ -50,8 +52,6 @@ export function useThemeRuntime(settings: ThemeRuntimeSettings) {
     resolvedTheme,
     lightUiThemeId,
     darkUiThemeId,
-    accentMode,
-    customAccent,
   }), [
     terminalThemeId,
     terminalThemeDarkId,
@@ -60,9 +60,17 @@ export function useThemeRuntime(settings: ThemeRuntimeSettings) {
     resolvedTheme,
     lightUiThemeId,
     darkUiThemeId,
+  ]);
+
+  const accentRef = useRef({ accentMode, customAccent });
+  accentRef.current = { accentMode, customAccent };
+
+  // Chrome / injection consumers need live accent on every settings change.
+  const appearanceSettings = useMemo((): TerminalAppearanceSettings => ({
+    ...appearanceSettingsBase,
     accentMode,
     customAccent,
-  ]);
+  }), [appearanceSettingsBase, accentMode, customAccent]);
 
   const globalAppearance = useMemo(() => resolveGlobalTerminalAppearance({
     userIntent,
@@ -70,14 +78,21 @@ export function useThemeRuntime(settings: ThemeRuntimeSettings) {
     customThemes,
   }), [userIntent, appearanceSettings, customThemes]);
 
+  // Read accent from a ref so this callback identity does not churn on drag.
+  // Callers that invoke it after an accent-only update still get the latest
+  // accent; Terminal panes also re-apply appearanceChromeStore at the leaf.
   const resolveFocusedAppearance = useCallback((hostScope: TerminalAppearanceHostScope): ResolvedAppearance => (
     resolveTerminalAppearance({
       userIntent,
-      settings: appearanceSettings,
+      settings: {
+        ...appearanceSettingsBase,
+        accentMode: accentRef.current.accentMode,
+        customAccent: accentRef.current.customAccent,
+      },
       hostScope,
       customThemes,
     })
-  ), [userIntent, appearanceSettings, customThemes]);
+  ), [userIntent, appearanceSettingsBase, customThemes]);
 
   const applyFollowAppSettingsForPick = useCallback((themeId: string) => {
     const update = getFollowAppTerminalThemeSelectionUpdate(themeId);

application/state/useVaultImportHandlers.architecture.test.ts

@@ -0,0 +1,12 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./useVaultImportHandlers.ts", import.meta.url), "utf8");
+
+test("useVaultImportHandlers stays below the UI layer", () => {
+  assert.doesNotMatch(source, /from ["'].*components\//);
+  assert.doesNotMatch(source, /from ["'].*\/toast["']/);
+  assert.match(source, /notify: VaultImportNotifier/);
+  assert.match(source, /from ["']\.\/vaultImportOptions["']/);
+});

application/state/useVaultImportHandlers.ts

@@ -4,7 +4,7 @@ import {
   readRememberedKeyPassphrases,
   rememberImportedKeyPassphrase,
   resolveDefaultKeyPassphraseAliases,
-} from "../../application/defaultKeyPassphrases";
+} from "../defaultKeyPassphrases";
 import {
   countVaultImportDuplicates,
   ensureVaultImportPersisted,
@@ -15,12 +15,12 @@ import {
   waitForVaultImportProgressPaint,
   type VaultHostPersistenceResult,
   type VaultImportProgress,
-} from "../../application/state/vaultImportProgress";
-import { importVaultHostsInWorker } from "../../application/state/vaultImportWorker";
+} from "./vaultImportProgress";
+import { importVaultHostsInWorker } from "./vaultImportWorker";
 import {
   type VaultLockHandle,
   withVaultImportLock,
-} from "../../application/state/vaultManagedImportLock";
+} from "./vaultManagedImportLock";
 
 /** Exit the import lock so a concurrent host save can finish, then retry. */
 const RETRY_VAULT_IMPORT_AFTER_CONCURRENT_EDIT = Symbol("retry-vault-import-after-concurrent-edit");
@@ -36,14 +36,14 @@ import {
   type VaultImportFormat,
 } from "../../domain/vaultImport";
 import type { GroupConfig, Host, ManagedSource, SSHKey } from "../../types";
-import type { ImportOptions } from "./ImportVaultDialog";
-import { toast } from "../ui/toast";
+import type { VaultImportNotifier, VaultImportOptions } from "./vaultImportOptions";
 
 interface UseVaultImportHandlersOptions {
   customGroups: string[];
   hosts: Host[];
   keys: SSHKey[];
   managedSources: ManagedSource[];
+  notify: VaultImportNotifier;
   onReadPersistedHosts: () => Promise<Host[]>;
   onUpdateHosts: (hosts: Host[]) => VaultHostPersistenceResult | Promise<VaultHostPersistenceResult>;
   onUpdateKeys: (keys: SSHKey[]) => void;
@@ -73,6 +73,7 @@ export function useVaultImportHandlers({
   hosts,
   keys,
   managedSources,
+  notify,
   onReadPersistedHosts,
   onUpdateHosts,
   onUpdateKeys,
@@ -109,7 +110,7 @@ export function useVaultImportHandlers({
   }, [setIsImportOpen]);
 
   const handleImportFileSelected = useCallback(
-      async (format: VaultImportFormat, files: File[], options?: ImportOptions) => {
+      async (format: VaultImportFormat, files: File[], options?: VaultImportOptions) => {
         const file = files[0];
         if (!file) return;
         if (importInFlightRef.current) return;
@@ -287,7 +288,7 @@ export function useVaultImportHandlers({
               stage: "failed",
               error: message,
             });
-            toast.error(
+            notify.error(
               message,
               t("vault.import.sshConfig.noFilePath"),
             );
@@ -305,7 +306,7 @@ export function useVaultImportHandlers({
                 stage: "failed",
                 error: message,
               });
-              toast.error(
+              notify.error(
                 message,
                 t("vault.import.sshConfig.alreadyManaged"),
               );
@@ -601,7 +602,7 @@ export function useVaultImportHandlers({
               stage: "failed",
               error: message,
             });
-            toast.error(
+            notify.error(
               message,
               t("vault.import.toast.failedTitle"),
             );
@@ -617,7 +618,7 @@ export function useVaultImportHandlers({
               skipped,
               duplicates,
             });
-            toast.warning(
+            notify.warning(
               t("vault.import.toast.noNewHosts", { format: formatLabel }),
               t("vault.import.toast.completedTitle"),
             );
@@ -628,7 +629,7 @@ export function useVaultImportHandlers({
           rollbackSnapshot = null;
   
           if (isManaged) {
-            toast.success(
+            notify.success(
               t("vault.import.sshConfig.managedSuccess", { count: totalAffected }),
               t("vault.import.toast.completedTitle"),
             );
@@ -641,12 +642,12 @@ export function useVaultImportHandlers({
   
             if (hasWarnings) {
               const firstIssue = result.issues[0]?.message;
-              toast.warning(
+              notify.warning(
                 firstIssue ? `${details} ${t("vault.import.toast.firstIssue", { issue: firstIssue })}` : details,
                 t("vault.import.toast.completedTitle"),
               );
             } else {
-              toast.success(details, t("vault.import.toast.completedTitle"));
+              notify.success(details, t("vault.import.toast.completedTitle"));
             }
           }
           updateProgress({
@@ -684,7 +685,7 @@ export function useVaultImportHandlers({
             stage: "failed",
             error: message,
           });
-          toast.error(message, t("vault.import.toast.failedTitle"));
+          notify.error(message, t("vault.import.toast.failedTitle"));
         } finally {
           if (activeImportAbortRef.current === abortController) {
             activeImportAbortRef.current = null;
@@ -694,6 +695,7 @@ export function useVaultImportHandlers({
         }
       },
       [
+        notify,
         onReadPersistedHosts,
         onCommitVaultImportTransaction,
         onReadPersistedManagedSources,

application/state/useVaultState.ts

@@ -58,6 +58,7 @@ import {
 } from "../../domain/globalHistory";
 import {
   buildTerminalDataMapFromLogs,
+  connectionLogTerminalDataMapsEqual,
   mergeConnectionLogsFromStorage,
   mergeTerminalDataIntoLogs,
   mergeTerminalDataMapsForStorage,
@@ -65,6 +66,10 @@ import {
 } from "../../domain/connectionLogTerminalData";
 import { getNextVaultOrder, normalizeVaultOrder } from "../../domain/vaultOrder";
 import { loadSanitizedShellHistory } from "./shellHistoryPersistence";
+import {
+  publishNotesSnapshot,
+  registerNotesActions,
+} from "./notesStore";
 import { publishShellHistorySnapshot } from "./shellHistoryStore";
 import { setVaultInitialized } from "./vaultInitStore";
 import {
@@ -257,7 +262,7 @@ const writeConnectionLogTerminalDataMap = (
     localMaps,
     buildPersistedLogIds(logs, usePersistedLogIdsFromDisk),
   );
-  if (JSON.stringify(existing) === JSON.stringify(pruned)) return true;
+  if (connectionLogTerminalDataMapsEqual(existing, pruned)) return true;
   return localStorageAdapter.write(STORAGE_KEY_CONNECTION_LOG_TERMINAL_DATA, pruned);
 };
 
@@ -280,9 +285,13 @@ export const useVaultState = () => {
   const customGroupsRef = useRef<string[]>([]);
   const managedSourcesRef = useRef<ManagedSource[]>([]);
   const hostsRef = useRef<Host[]>([]);
+  const notesRef = useRef<VaultNote[]>([]);
+  const noteGroupsRef = useRef<string[]>([]);
   customGroupsRef.current = customGroups;
   managedSourcesRef.current = managedSources;
   hostsRef.current = hosts;
+  notesRef.current = notes;
+  noteGroupsRef.current = noteGroups;
 
   // Write-version counters prevent out-of-order async writes from overwriting
   // newer data.  Each update bumps the counter; the .then() callback only
@@ -591,14 +600,20 @@ export const useVaultState = () => {
 
   const updateNotes = useCallback((data: Partial<VaultNote>[]) => {
     const cleaned = normalizeVaultNotes(data);
+    notesRef.current = cleaned;
     setNotes(cleaned);
     localStorageAdapter.write(STORAGE_KEY_NOTES, cleaned);
+    // Publish synchronously so Notes→AI handoff does not read a stale catalog
+    // while React state is still committing (useLayoutEffect republishes too).
+    publishNotesSnapshot({ notes: cleaned, noteGroups: noteGroupsRef.current });
   }, []);
 
   const updateNoteGroups = useCallback((data: unknown) => {
     const cleaned = normalizeNoteGroups(data);
+    noteGroupsRef.current = cleaned;
     setNoteGroups(cleaned);
     localStorageAdapter.write(STORAGE_KEY_NOTE_GROUPS, cleaned);
+    publishNotesSnapshot({ notes: notesRef.current, noteGroups: cleaned });
   }, []);
 
   const updateCustomGroups = useCallback((
@@ -828,6 +843,18 @@ export const useVaultState = () => {
     publishShellHistorySnapshot(shellHistory);
   }, [shellHistory]);
 
+  // Notes catalog for Notes / AI side panels — keep TerminalLayer off the hot path.
+  useLayoutEffect(() => {
+    publishNotesSnapshot({ notes, noteGroups });
+  }, [notes, noteGroups]);
+
+  useLayoutEffect(() => {
+    registerNotesActions({ updateNotes, updateNoteGroups });
+    return () => {
+      registerNotesActions(null);
+    };
+  }, [updateNotes, updateNoteGroups]);
+
   const addShellHistoryEntry = useCallback(
     (entry: Omit<ShellHistoryEntry, "id" | "timestamp">) => {
       setShellHistory((prev) => {
@@ -1375,9 +1402,12 @@ export const useVaultState = () => {
 
   const updateHostLastConnected = useCallback((hostId: string) => {
     setHosts((prev) => {
-      const next = prev.map((h) =>
-        h.id === hostId ? { ...h, lastConnectedAt: Date.now() } : h,
-      );
+      const idx = prev.findIndex((h) => h.id === hostId);
+      if (idx < 0) return prev;
+      const now = Date.now();
+      if (prev[idx].lastConnectedAt === now) return prev;
+      const next = prev.slice();
+      next[idx] = { ...prev[idx], lastConnectedAt: now };
       const ver = ++hostsWriteVersion.current;
       const encryptPromise = encryptHosts(next);
       hostsEncryptPendingRef.current = encryptPromise.then(() => undefined);

application/state/vaultImportOptions.ts

@@ -0,0 +1,17 @@
+import type { VaultImportDestination } from "../../domain/vaultImport";
+import type { VaultImportFileEncoding } from "./vaultImportFile";
+
+/** Options for a vault host-file import (kept out of UI modules). */
+export type VaultImportOptions = {
+  managed?: boolean;
+  filePath?: string;
+  encoding?: VaultImportFileEncoding;
+  destination?: VaultImportDestination;
+};
+
+/** Notification sink so application/state hooks do not import UI toast. */
+export type VaultImportNotifier = {
+  success: (message: string, title?: string) => void;
+  error: (message: string, title?: string) => void;
+  warning: (message: string, title?: string) => void;
+};

components/AIChatPanelContent.tsx

@@ -49,8 +49,8 @@ interface AIChatPanelContentProps {
   handleDeleteSession: (event: React.MouseEvent, sessionId: string) => void;
   messages: ChatMessage[];
   isStreaming: boolean;
-  activeCompaction?: import('./ai/hooks/useAgentCompactionUi').ActiveCompactionUi | null;
-  contextUsage?: import('./ai/hooks/useAgentCompactionUi').AgentContextUsage | null;
+  activeCompaction?: import('../application/state/useAgentCompactionUi').ActiveCompactionUi | null;
+  contextUsage?: import('../application/state/useAgentCompactionUi').AgentContextUsage | null;
   inputValue: string;
   setInputValue: (value: string) => void;
   handleSend: () => void;

components/AIChatSidePanel.mountRetention.test.ts

@@ -252,3 +252,68 @@ test('AI side panel skips re-render when only a sibling scope session object cha
     false,
   );
 });
+
+test('AI side panel skips re-render when sibling stream only bumps updatedAt', () => {
+  const own = session({
+    id: 'session-1',
+    scope: { type: 'terminal', targetId: 'terminal-1' },
+    updatedAt: 10,
+  });
+  const siblingA = session({
+    id: 'session-2',
+    scope: { type: 'terminal', targetId: 'terminal-2' },
+    title: 'Sibling',
+    updatedAt: 10,
+  });
+  const siblingStreamed = session({
+    id: 'session-2',
+    scope: { type: 'terminal', targetId: 'terminal-2' },
+    title: 'Sibling',
+    updatedAt: 99,
+  });
+  const prev = baseProps({
+    isVisible: true,
+    scopeType: 'terminal',
+    scopeTargetId: 'terminal-1',
+    sessions: [own, siblingA],
+  });
+  assert.equal(
+    aiChatSidePanelPropsAreEqual(prev, {
+      ...prev,
+      sessions: [own, siblingStreamed],
+    }),
+    true,
+  );
+});
+
+test('AI side panel re-renders when sibling history chrome title changes', () => {
+  const own = session({
+    id: 'session-1',
+    scope: { type: 'terminal', targetId: 'terminal-1' },
+  });
+  const siblingA = session({
+    id: 'session-2',
+    scope: { type: 'terminal', targetId: 'terminal-2' },
+    title: 'Old',
+    updatedAt: 10,
+  });
+  const siblingRenamed = session({
+    id: 'session-2',
+    scope: { type: 'terminal', targetId: 'terminal-2' },
+    title: 'New',
+    updatedAt: 10,
+  });
+  const prev = baseProps({
+    isVisible: true,
+    scopeType: 'terminal',
+    scopeTargetId: 'terminal-1',
+    sessions: [own, siblingA],
+  });
+  assert.equal(
+    aiChatSidePanelPropsAreEqual(prev, {
+      ...prev,
+      sessions: [own, siblingRenamed],
+    }),
+    false,
+  );
+});

components/AIChatSidePanel.tsx

@@ -49,7 +49,7 @@ import {
   getNetcattyBridge,
   isAIChatSessionStreaming,
   type DefaultTargetSessionHint,
-} from './ai/hooks/useAIChatStreaming';
+} from '../application/state/useAIChatStreaming';
 import { getScopedHistorySessions } from './ai/scopedHistorySessions';
 import { aiSessionIdSetEqual, exactScopeAISessionsEqual } from '../domain/aiSessionsForScope';
 import { buildExternalAgentHistoryMessagesForBridge } from './ai/externalAgentHistory';
@@ -60,7 +60,7 @@ import { stopAgentTurn } from '../infrastructure/ai/harness/agentStop';
 import { getAgentRuntime } from '../infrastructure/ai/harness/globalAgentRuntime';
 import { useAIPermissionGrantsState } from '../application/state/useAIPermissionGrantsState';
 import { useConversationExport } from './ai/hooks/useConversationExport';
-import { useAgentContextUsage } from './ai/hooks/useAgentCompactionUi';
+import { useAgentContextUsage } from '../application/state/useAgentCompactionUi';
 import type { AIChatSidePanelProps } from './AIChatSidePanel.types';
 import {
   buildCursorListModelsAgentEnv,
@@ -1599,12 +1599,23 @@ export function aiChatSidePanelPropsAreEqual(
   )) {
     return false;
   }
-  // History drawer / recent list need create/delete/title/updatedAt chrome.
-  // Only when the panel is (or becomes) visible so hidden retained panels do
-  // not re-render on every sibling stream that bumps updatedAt.
+  // History drawer / recent list need create/delete/title chrome for the full
+  // list (fuzzy ranking still receives every session). updatedAt is compared
+  // for this panel's exact scope (+ selected resume) and, for workspace
+  // panels, sibling workspace timestamps so history sort/relative time stay
+  // fresh — without letting unrelated terminal stream ticks invalidate.
   const prevVisible = prev.isVisible ?? true;
   const nextVisible = next.isVisible ?? true;
-  if ((prevVisible || nextVisible) && !aiSessionIdSetEqual(prev.sessions, next.sessions)) {
+  if (
+    (prevVisible || nextVisible)
+    && !aiSessionIdSetEqual(
+      prev.sessions,
+      next.sessions,
+      prev.scopeType,
+      prev.scopeTargetId,
+      selectedSessionId,
+    )
+  ) {
     return false;
   }
 

components/KnownHostsManager.gridColumns.test.ts

@@ -0,0 +1,30 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+import { getKnownHostsGridColumnCount } from "./knownHostsGridLayout.ts";
+
+test("known-host grids use container-width column steps", () => {
+  assert.equal(getKnownHostsGridColumnCount(400), 2);
+  assert.equal(getKnownHostsGridColumnCount(640), 3);
+  assert.equal(getKnownHostsGridColumnCount(1000), 3);
+  assert.equal(getKnownHostsGridColumnCount(1280), 4);
+  assert.equal(getKnownHostsGridColumnCount(1800), 4);
+});
+
+test("virtualized and non-virtual known hosts share container column policy", () => {
+  const source = readFileSync(new URL("./KnownHostsManager.tsx", import.meta.url), "utf8");
+  assert.match(source, /getColumnCount=\{\(width, mode\) =>/);
+  assert.match(source, /getKnownHostsGridColumnCount\(width\)/);
+  assert.match(source, /getElementContentWidth\(el\)/);
+  assert.match(source, /gridTemplateColumns: `repeat\(\$\{gridColumns\}, minmax\(0, 1fr\)\)`/);
+  assert.doesNotMatch(source, /sm:grid-cols-3|xl:grid-cols-4/);
+  assert.doesNotMatch(source, /getKnownHostsGridColumnCount\(el\.clientWidth\)/);
+});
+
+test("virtualized known-host cards expose a focus target for keyboard nav", () => {
+  const source = readFileSync(new URL("./KnownHostsManager.tsx", import.meta.url), "utf8");
+  // Grid and list HostItem roots both need a focus target for VirtualizedHostCollection.
+  assert.equal([...source.matchAll(/data-vault-focus-target/g)].length, 2);
+  assert.equal([...source.matchAll(/tabIndex=\{0\}/g)].length, 2);
+});

components/KnownHostsManager.tsx

@@ -43,7 +43,6 @@ import {
   ContextMenuTrigger,
 } from "./ui/context-menu";
 import { Dropdown, DropdownContent, DropdownTrigger } from "./ui/dropdown";
-import { ScrollArea } from "./ui/scroll-area";
 import { SortDropdown, SortMode } from "./ui/sort-dropdown";
 import { Tooltip, TooltipContent, TooltipTrigger } from "./ui/tooltip";
 import { toast } from "./ui/toast";
@@ -55,8 +54,13 @@ import {
 } from "./vault/VaultPageHeader";
 import { VaultDeleteConfirmDialog } from "./vault/VaultDeleteConfirmDialog";
 import { VaultEntityIcon, vaultPrimaryIconClass } from "./vault/VaultEntityIcon";
+import { VirtualizedHostCollection } from "./vault/VirtualizedHostCollection";
+import { getKnownHostsGridColumnCount } from "./knownHostsGridLayout";
+import { getElementContentWidth } from "./vault/vaultHostGridLayout";
 import { useVaultItemReorder } from "./vault/vaultReorderDrag";
 
+const VIRTUALIZE_THRESHOLD = 30;
+
 interface KnownHostsManagerProps {
   knownHosts: KnownHost[];
   hosts: Host[];
@@ -207,6 +211,8 @@ const HostItem = React.memo<HostItemProps>(
           <ContextMenuTrigger asChild>
             <div
               {...reorderProps}
+              data-vault-focus-target
+              tabIndex={0}
               className={cn(
                 reorderProps && "vault-drop-indicator-row",
                 "group cursor-pointer soft-card elevate rounded-xl h-[68px] px-3 py-2",
@@ -256,6 +262,8 @@ const HostItem = React.memo<HostItemProps>(
         <ContextMenuTrigger asChild>
           <div
             {...reorderProps}
+            data-vault-focus-target
+            tabIndex={0}
             className={cn(
               reorderProps && "vault-drop-indicator-row",
               "group flex items-center gap-3 px-3 py-2 h-14 rounded-lg hover:bg-secondary/60 transition-colors cursor-pointer",
@@ -328,8 +336,8 @@ const KnownHostsManager: React.FC<KnownHostsManagerProps> = ({
   const [sortMode, setSortMode] = useState<SortMode>("manual");
   const fileInputRef = React.useRef<HTMLInputElement>(null);
   const hasScannedRef = React.useRef(false);
-  const listRef = React.useRef<HTMLDivElement | null>(null);
-  const RENDER_LIMIT = 100; // Limit rendered items for performance
+  const scrollRef = React.useRef<HTMLDivElement | null>(null);
+  const [gridColumns, setGridColumns] = useState(2);
 
   // Define handleScanSystem before useEffect that depends on it
   const handleScanSystem = useCallback(async (silent = false) => {
@@ -454,12 +462,25 @@ const KnownHostsManager: React.FC<KnownHostsManagerProps> = ({
     return sortMode === "manual" ? sortByVaultOrder(result) : result;
   }, [knownHosts, deferredSearch, sortMode]);
 
-  // Limit rendered items for performance
-  const displayedHosts = useMemo(() => {
-    return filteredHosts.slice(0, RENDER_LIMIT);
-  }, [filteredHosts]);
+  const shouldVirtualize = filteredHosts.length >= VIRTUALIZE_THRESHOLD;
 
-  const hasMore = filteredHosts.length > RENDER_LIMIT;
+  useEffect(() => {
+    const el = scrollRef.current;
+    if (!el || viewMode !== "grid" || typeof ResizeObserver === "undefined") return;
+    const recompute = () => {
+      setGridColumns(getKnownHostsGridColumnCount(getElementContentWidth(el)));
+    };
+    recompute();
+    const observer = new ResizeObserver(recompute);
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [viewMode, filteredHosts.length]);
+  const collectionLayoutKey = [
+    viewMode,
+    deferredSearch.trim() ? "search" : "browse",
+    sortMode,
+    filteredHosts.length,
+  ].join("|");
 
   const handleFileSelect = useCallback(
     (e: React.ChangeEvent<HTMLInputElement>) => {
@@ -541,22 +562,22 @@ const KnownHostsManager: React.FC<KnownHostsManagerProps> = ({
   const openFilePicker = useCallback(() => fileInputRef.current?.click(), []);
 
   const knownHostReorder = useVaultItemReorder({
-    containerRef: listRef,
+    containerRef: scrollRef,
     viewMode,
     dragType: "known-host-id",
     targetAttribute: "data-known-host-id",
     disabled: deferredSearch.trim().length > 0,
+    // Virtualized grid cards can unmount mid-drag — use indicators, not live reorder.
+    preferDropIndicator: shouldVirtualize,
     onReorder: (sourceId, targetId, position) => {
       onReorder(reorderVaultItems(knownHosts, sourceId, targetId, position));
       setSortMode("manual");
     },
   });
 
-  // Memoize the rendered list to prevent re-renders
-  const renderedItems = useMemo(() => {
-    return displayedHosts.map((knownHost) => (
+  const renderKnownHostItem = useCallback(
+    (knownHost: KnownHost) => (
       <HostItem
-        key={knownHost.id}
         knownHost={knownHost}
         converted={convertedMap.get(knownHost.id) || false}
         viewMode={viewMode}
@@ -564,15 +585,15 @@ const KnownHostsManager: React.FC<KnownHostsManagerProps> = ({
         onDelete={handleDelete}
         onConvertToHost={handleConvertToHost}
       />
-    ));
-  }, [
-    displayedHosts,
-    convertedMap,
-    viewMode,
-    handleDelete,
-    handleConvertToHost,
-    knownHostReorder,
-  ]);
+    ),
+    [
+      convertedMap,
+      viewMode,
+      handleDelete,
+      handleConvertToHost,
+      knownHostReorder,
+    ],
+  );
 
   return (
     <div className="h-full flex flex-col">
@@ -657,74 +678,75 @@ const KnownHostsManager: React.FC<KnownHostsManagerProps> = ({
       </VaultPageHeader>
 
       {/* Content */}
-      <ScrollArea className="flex-1">
-        <div
-          ref={listRef}
-          className={cn(
-            "p-4",
-            viewMode === "grid"
-              ? "grid grid-cols-2 sm:grid-cols-3 xl:grid-cols-4 gap-3"
-              : "flex flex-col gap-0",
-          )}
-          onDragOverCapture={knownHostReorder.handleDragOverCapture}
-          onDragOver={knownHostReorder.handleDragOver}
-          onDropCapture={knownHostReorder.handleDropCapture}
-          onDragEndCapture={knownHostReorder.handleDragEndCapture}
-        >
-          {displayedHosts.length === 0 ? (
-            <div
-              className={cn(
-                "flex flex-col items-center justify-center py-16 text-muted-foreground",
-                viewMode === "grid" && "col-span-full",
-              )}
-            >
-              <div className="h-16 w-16 rounded-2xl bg-secondary/80 flex items-center justify-center mb-4">
-                <Shield size={32} className="opacity-60" />
-              </div>
-              <h3 className="text-lg font-semibold text-foreground mb-2">
-                {t("knownHosts.empty.title")}
-              </h3>
-              <p className="text-sm text-center max-w-sm mb-4">
-                {t("knownHosts.empty.desc")}
-              </p>
-              <div className="flex gap-2">
-                <Button
-                  variant="secondary"
-                  onClick={() => handleScanSystem()}
-                  disabled={isScanning}
-                >
-                  <RefreshCw
-                    size={14}
-                    className={cn("mr-2", isScanning && "animate-spin")}
-                  />
-                  {t("knownHosts.action.scanSystem")}
-                </Button>
-                <Button variant="outline" onClick={openFilePicker}>
-                  <FolderOpen size={14} className="mr-2" />
-                  {t("knownHosts.action.browseFile")}
-                </Button>
-              </div>
+      <div
+        ref={scrollRef}
+        className="flex-1 overflow-auto p-4"
+        onDragOverCapture={knownHostReorder.handleDragOverCapture}
+        onDragOver={knownHostReorder.handleDragOver}
+        onDropCapture={knownHostReorder.handleDropCapture}
+        onDragEndCapture={knownHostReorder.handleDragEndCapture}
+      >
+        {filteredHosts.length === 0 ? (
+          <div className="flex flex-col items-center justify-center py-16 text-muted-foreground">
+            <div className="h-16 w-16 rounded-2xl bg-secondary/80 flex items-center justify-center mb-4">
+              <Shield size={32} className="opacity-60" />
             </div>
-          ) : (
-            <>
-              {renderedItems}
-              {hasMore && (
-                <div
-                  className={cn(
-                    "text-center py-4 text-sm text-muted-foreground",
-                    viewMode === "grid" && "col-span-full",
-                  )}
-                >
-                  {t("knownHosts.results.showingLimited", {
-                    shown: displayedHosts.length,
-                    total: filteredHosts.length,
-                  })}
-                </div>
-              )}
-            </>
-          )}
-        </div>
-      </ScrollArea>
+            <h3 className="text-lg font-semibold text-foreground mb-2">
+              {t("knownHosts.empty.title")}
+            </h3>
+            <p className="text-sm text-center max-w-sm mb-4">
+              {t("knownHosts.empty.desc")}
+            </p>
+            <div className="flex gap-2">
+              <Button
+                variant="secondary"
+                onClick={() => handleScanSystem()}
+                disabled={isScanning}
+              >
+                <RefreshCw
+                  size={14}
+                  className={cn("mr-2", isScanning && "animate-spin")}
+                />
+                {t("knownHosts.action.scanSystem")}
+              </Button>
+              <Button variant="outline" onClick={openFilePicker}>
+                <FolderOpen size={14} className="mr-2" />
+                {t("knownHosts.action.browseFile")}
+              </Button>
+            </div>
+          </div>
+        ) : shouldVirtualize ? (
+          <VirtualizedHostCollection
+            items={filteredHosts}
+            itemKey={(knownHost) => knownHost.id}
+            scrollRef={scrollRef}
+            viewMode={viewMode}
+            layoutKey={collectionLayoutKey}
+            ariaLabel={t("vault.nav.knownHosts")}
+            getColumnCount={(width, mode) => (
+              mode === "grid" ? getKnownHostsGridColumnCount(width) : 1
+            )}
+            renderItem={renderKnownHostItem}
+          />
+        ) : (
+          <div
+            className={cn(
+              viewMode === "grid"
+                ? "grid gap-3"
+                : "flex flex-col gap-0",
+            )}
+            style={viewMode === "grid" ? {
+              gridTemplateColumns: `repeat(${gridColumns}, minmax(0, 1fr))`,
+            } : undefined}
+          >
+            {filteredHosts.map((knownHost) => (
+              <React.Fragment key={knownHost.id}>
+                {renderKnownHostItem(knownHost)}
+              </React.Fragment>
+            ))}
+          </div>
+        )}
+      </div>
       <VaultDeleteConfirmDialog
         open={Boolean(deleteTargetId)}
         title={t("vault.deleteConfirm.title", {

components/SftpSidePanel.tsx

@@ -27,7 +27,6 @@ import { useI18n } from "../application/i18n/I18nProvider";
 import { useSftpState } from "../application/state/useSftpState";
 import {
   useReportSftpTransferOwnerActivity,
-  useWarmSftpTransferPool,
 } from "../application/state/sftp/useSftpTransferLifecycle";
 import { registerEditorSftpWriterScoped } from "../application/state/editorSftpBridge";
 import {
@@ -61,7 +60,7 @@ import { SftpContextProvider } from "./sftp";
 import { useSftpViewPaneCallbacks } from "./sftp/hooks/useSftpViewPaneCallbacks";
 import { useSftpViewTabs } from "./sftp/hooks/useSftpViewTabs";
 import { useSftpKeyboardShortcuts } from "./sftp/hooks/useSftpKeyboardShortcuts";
-import { sftpFocusStore } from "./sftp/hooks/useSftpFocusedPane";
+import { sftpFocusStore } from "../application/state/sftp/sftpFocusStore";
 import { keepOnlyPaneSelections } from "./sftp/hooks/selectionScope";
 import { KeyBinding, HotkeyScheme } from "../domain/models";
 import {
@@ -300,12 +299,6 @@ const SftpSidePanelInner: React.FC<SftpSidePanelProps> = ({
   const sftpRef = useRef(sftp);
   sftpRef.current = sftp;
 
-  useWarmSftpTransferPool({
-    hostIds: connectedHosts.map((entry) => entry.host.id),
-    activeHostId: activeHost?.protocol === "serial" ? undefined : activeHost?.id,
-    warmTransferPoolForHost: sftp.warmTransferPoolForHost,
-  });
-
   const { getConnectionCacheKey, leftPane } = sftp;
 
   useEffect(() => {

components/SftpView.tsx

@@ -29,7 +29,6 @@ import { Host, Identity, KnownHost, ProxyProfile, SSHKey, TransferTask } from ".
 import { resolveGroupDefaults, applyGroupDefaults } from "../domain/groupConfig";
 import { materializeHostProxyProfile } from "../domain/proxyProfiles";
 import { useSftpFileAssociations } from "../application/state/useSftpFileAssociations";
-import { useWarmSftpTransferPool } from "../application/state/sftp/useSftpTransferLifecycle";
 import { registerEditorSftpWriterScoped } from "../application/state/editorSftpBridge";
 import { toast } from "./ui/toast";
 
@@ -44,7 +43,7 @@ import { SftpContextProvider, activeTabStore } from "./sftp";
 import { useSftpViewPaneCallbacks } from "./sftp/hooks/useSftpViewPaneCallbacks";
 import { useSftpViewTabs } from "./sftp/hooks/useSftpViewTabs";
 import { useSftpKeyboardShortcuts } from "./sftp/hooks/useSftpKeyboardShortcuts";
-import { sftpFocusStore, SftpFocusedSide, useSftpFocusedSide } from "./sftp/hooks/useSftpFocusedPane";
+import { sftpFocusStore, SftpFocusedSide, useSftpFocusedSide } from "../application/state/sftp/sftpFocusStore";
 import { keepOnlyActivePaneSelections, keepOnlyPaneSelections } from "./sftp/hooks/selectionScope";
 
 
@@ -186,11 +185,6 @@ const SftpViewInner: React.FC<SftpViewProps> = ({
   const sftpRef = useRef(sftp);
   sftpRef.current = sftp;
 
-  useWarmSftpTransferPool({
-    hostIds: connectedHosts.map((entry) => entry.host.id),
-    warmTransferPoolForHost: sftp.warmTransferPoolForHost,
-  });
-
   // Register this useSftpState's writeTextFileByConnection with the bridge so
   // the editor tab's save path can reach the active SFTP session. The bridge
   // supports multiple simultaneous writers (SftpSidePanel inside terminals

components/SnippetsManager.gridColumns.test.ts

@@ -0,0 +1,36 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+import { getSnippetsGridColumnCount } from "./snippetsGridLayout.ts";
+
+test("full-width snippet grids use container-width column steps", () => {
+  assert.equal(getSnippetsGridColumnCount(500, { hasSidePanel: false }), 1);
+  assert.equal(getSnippetsGridColumnCount(768, { hasSidePanel: false }), 2);
+  assert.equal(getSnippetsGridColumnCount(1279, { hasSidePanel: false }), 2);
+  assert.equal(getSnippetsGridColumnCount(1280, { hasSidePanel: false }), 3);
+  assert.equal(getSnippetsGridColumnCount(2000, { hasSidePanel: false }), 3);
+});
+
+test("split-view snippet grids keep the card-width column count", () => {
+  assert.equal(getSnippetsGridColumnCount(219, { hasSidePanel: true }), 1);
+  assert.equal(getSnippetsGridColumnCount(452, { hasSidePanel: true }), 2);
+  assert.equal(getSnippetsGridColumnCount(916, { hasSidePanel: true }), 4);
+});
+
+test("virtualized and CSS snippet grids share container column policy", () => {
+  const source = readFileSync(new URL("./SnippetsManager.tsx", import.meta.url), "utf8");
+  assert.match(source, /getColumnCount=\{\(width, mode\) =>/);
+  assert.match(source, /getSnippetsGridColumnCount\(width, \{ hasSidePanel: hasSnippetsSidePanel \}\)/);
+  assert.match(source, /getSnippetsGridColumnCount\(getElementContentWidth\(el\)/);
+  assert.match(source, /snippetGridStyle/);
+  assert.doesNotMatch(source, /md:grid-cols-2|xl:grid-cols-3/);
+  assert.doesNotMatch(source, /getSnippetsGridColumnCount\(el\.clientWidth/);
+});
+
+test("virtualized snippet drops reset drag state without waiting for dragend", () => {
+  const source = readFileSync(new URL("./SnippetsManager.tsx", import.meta.url), "utf8");
+  assert.match(source, /handleReorderDrop = useCallback/);
+  assert.match(source, /finally \{\s*\/\/ Virtualized cards[\s\S]*resetSnippetDragState\(\);/);
+  assert.match(source, /resetSnippetDragState,/);
+});

components/SnippetsManager.tsx

@@ -49,6 +49,9 @@ import {
   vaultSnippetIconClass,
 } from './vault/VaultEntityIcon';
 import { VaultDeleteConfirmDialog } from './vault/VaultDeleteConfirmDialog';
+import { VirtualizedHostCollection } from './vault/VirtualizedHostCollection';
+import { getSnippetsGridColumnCount } from './snippetsGridLayout';
+import { getElementContentWidth } from './vault/vaultHostGridLayout';
 import {
   clearVaultDropIndicator as clearSnippetDropIndicator,
   getVaultDropIntent as getPackageDropIntent,
@@ -59,6 +62,8 @@ import {
   useVaultGridLayoutAnimation,
 } from './vault/vaultReorderDrag';
 
+const VIRTUALIZE_THRESHOLD = 30;
+
 interface SnippetsManagerProps {
   snippets: Snippet[];
   packages: string[];
@@ -521,22 +526,18 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
   const prepareGridLayoutAnimation = useVaultGridLayoutAnimation(listRef);
   const hasSnippetsSidePanel = rightPanelMode !== 'none';
   const splitGridColsRef = useRef(2);
-  const splitViewGridStyle = hasSnippetsSidePanel && viewMode === 'grid'
+  const snippetGridStyle = viewMode === 'grid'
     ? { gridTemplateColumns: 'var(--snippets-grid-cols, repeat(2, minmax(0, 1fr)))' }
     : undefined;
 
   useEffect(() => {
     const el = listRef.current;
-    if (!el || typeof ResizeObserver === 'undefined') return;
-
-    const GAP = 12;
-    const MIN_CARD = 220;
-    const PADDING_X = 32;
+    if (!el || viewMode !== 'grid' || typeof ResizeObserver === 'undefined') return;
 
     const recompute = () => {
-      const usable = el.clientWidth - PADDING_X;
-      if (usable <= 0) return;
-      const next = Math.max(1, Math.floor((usable + GAP) / (MIN_CARD + GAP)));
+      const next = getSnippetsGridColumnCount(getElementContentWidth(el), {
+        hasSidePanel: hasSnippetsSidePanel,
+      });
       if (next === splitGridColsRef.current) return;
       splitGridColsRef.current = next;
       el.style.setProperty('--snippets-grid-cols', `repeat(${next}, minmax(0, 1fr))`);
@@ -1015,6 +1016,16 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
   }, [snippets, selectedPackage, search, sortMode]);
 
   const isSearchActive = search.trim().length > 0;
+  const shouldVirtualizeSnippets = displayedSnippets.length >= VIRTUALIZE_THRESHOLD;
+  const snippetCollectionLayoutKey = [
+    viewMode,
+    search.trim() ? 'search' : 'browse',
+    selectedPackage ?? 'root',
+    displayedPackages.length > 0 && !search.trim() ? 'packages' : 'no-packages',
+    hasSnippetsSidePanel ? 'panel' : 'full',
+    sortMode,
+    displayedSnippets.length,
+  ].join('|');
 
   useEffect(() => {
     setSelectedSnippetIds((prev) => {
@@ -1445,6 +1456,11 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
       const sourceSnippetId = draggingSnippetIdRef.current || event.dataTransfer.getData('snippet-id');
       const position = getDropPosition(target, event.clientX, event.clientY, isGrid);
       if (isGrid && sourceSnippetId && sourceSnippetId !== targetSnippetId) {
+        // Virtualized cards can unmount mid-drag — use drop indicator instead of live reorder.
+        if (shouldVirtualizeSnippets) {
+          markSnippetDropIndicator(target, position, 'x');
+          return;
+        }
         const targetSnippet = snippets.find((snippet) => snippet.id === targetSnippetId);
         const sourceSnippet = snippets.find((snippet) => snippet.id === sourceSnippetId);
         if (!targetSnippet || !sourceSnippet) return;
@@ -1513,11 +1529,13 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
     packages,
     parentOfPackage,
     prepareGridLayoutAnimation,
+    shouldVirtualizeSnippets,
     snippets,
     viewMode,
   ]);
 
   const handleReorderDrop = useCallback((event: React.DragEvent<HTMLDivElement>) => {
+    try {
     const target = (event.target as Element | null)?.closest('[data-snippet-id], [data-pkg-path]');
     clearSnippetDropIndicator();
     if (!(target instanceof HTMLElement)) return;
@@ -1577,12 +1595,18 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
       lastPreviewReorderRef.current = null;
       setSortMode('manual');
     }
+    } finally {
+      // Virtualized cards can unmount mid-drag so dragend never fires — always
+      // clear snippet/package drag ids on drop instead of relying on capture end.
+      resetSnippetDragState();
+    }
   }, [
     onBulkSave,
     onPackagesChange,
     packages,
     parentOfPackage,
     prepareGridLayoutAnimation,
+    resetSnippetDragState,
     snippets,
     viewMode,
   ]);
@@ -1702,6 +1726,129 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
     />
   );
 
+  const renderSnippetItem = (snippet: Snippet) => {
+    const isSelected = selectedSnippetIds.has(snippet.id);
+    return (
+      <ContextMenu>
+        <ContextMenuTrigger>
+          <div
+            className={cn(
+              "vault-drop-indicator-row group cursor-pointer overflow-hidden",
+              isSelected && (viewMode === 'grid' ? "ring-2 ring-primary/45 bg-primary/5" : "bg-primary/5"),
+              viewMode === 'grid'
+                ? "soft-card elevate rounded-xl h-[68px] px-3 py-2"
+                : "h-14 px-3 py-2 hover:bg-secondary/60 rounded-lg transition-colors"
+            )}
+            data-snippet-id={isSearchActive ? undefined : snippet.id}
+            data-vault-grid-item={`snippet:${snippet.id}`}
+            data-vault-reorder-grid={viewMode === 'grid' ? 'true' : undefined}
+            data-vault-reorder-dragging={draggingSnippetId === snippet.id ? 'true' : undefined}
+            draggable={!isSearchActive && !isMultiSelectMode}
+            onDragStart={(e) => {
+              e.dataTransfer.effectAllowed = 'move';
+              e.dataTransfer.setData('snippet-id', snippet.id);
+              draggingSnippetIdRef.current = snippet.id;
+              setDraggingSnippetId(snippet.id);
+              lastPreviewReorderRef.current = null;
+            }}
+            onClick={() => {
+              if (isMultiSelectMode) {
+                toggleSnippetSelection(snippet.id);
+              } else {
+                handleEdit(snippet);
+              }
+            }}
+          >
+            <div className="flex items-center gap-3 h-full min-w-0">
+              {isMultiSelectMode && (
+                <div
+                  className="shrink-0"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    toggleSnippetSelection(snippet.id);
+                  }}
+                >
+                  {isSelected ? (
+                    <CheckSquare size={18} className="text-primary" />
+                  ) : (
+                    <Square size={18} className="text-muted-foreground" />
+                  )}
+                </div>
+              )}
+              <VaultEntityIcon
+                className={isScriptSnippet(snippet) ? vaultAutomationScriptIconClass : vaultSnippetIconClass}
+                icon={isScriptSnippet(snippet) ? (
+                  <Play size={18} />
+                ) : (
+                  <Zap size={18} />
+                )}
+              />
+              <div className="w-0 flex-1">
+                <div className="text-sm font-semibold truncate">{snippet.label}</div>
+                <Tooltip>
+                  <TooltipTrigger asChild>
+                    <div className="text-[11px] text-muted-foreground font-mono leading-4 truncate">
+                      {flattenSnippetCommandPreview(snippet.command) || t('snippets.commandFallback')}
+                    </div>
+                  </TooltipTrigger>
+                  <TooltipContent side="bottom">
+                    <SnippetCommandTooltipContent
+                      command={snippet.command}
+                      fallback={t('snippets.commandFallback')}
+                    />
+                  </TooltipContent>
+                </Tooltip>
+              </div>
+              {snippet.shortkey && (
+                <div className="shrink-0 px-2 py-1 text-[10px] font-mono rounded border border-border bg-muted/50 text-muted-foreground">
+                  {snippet.shortkey}
+                </div>
+              )}
+              {viewMode === 'list' && !isMultiSelectMode && (
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 opacity-0 group-hover:opacity-100 transition-opacity shrink-0"
+                  onClick={(e) => { e.stopPropagation(); handleEdit(snippet); }}
+                >
+                  <Edit2 size={14} />
+                </Button>
+              )}
+            </div>
+          </div>
+        </ContextMenuTrigger>
+        <ContextMenuContent>
+          <ContextMenuItem
+            onClick={() => {
+              const runTargets = getRunnableHostsForSnippet(snippet, hosts);
+              if (runTargets.length > 0) {
+                onRunSnippet?.(snippet, runTargets);
+                return;
+              }
+              toast.error(t('scripts.actions.noRunnableHosts'));
+            }}
+            disabled={getRunnableHostsForSnippet(snippet, hosts).length === 0}
+          >
+            <Play className="mr-2 h-4 w-4" /> {t('action.run')}
+          </ContextMenuItem>
+          <ContextMenuSeparator />
+          <ContextMenuItem onClick={() => handleEdit(snippet)}>
+            <Edit2 className="mr-2 h-4 w-4" /> {t('action.edit')}
+          </ContextMenuItem>
+          <ContextMenuItem onClick={() => handleCopy(snippet.id, snippet.command)}>
+            <Copy className="mr-2 h-4 w-4" /> {t('action.copy')}
+          </ContextMenuItem>
+          <ContextMenuItem onClick={() => exportSingleSnippet(snippet)}>
+            <Download className="mr-2 h-4 w-4" /> {t('snippets.export.snippet')}
+          </ContextMenuItem>
+          <ContextMenuItem className="text-destructive" onClick={() => requestDeleteSnippet(snippet.id)}>
+            <Trash2 className="mr-2 h-4 w-4" /> {t('action.delete')}
+          </ContextMenuItem>
+        </ContextMenuContent>
+      </ContextMenu>
+    );
+  };
+
   return (
     <TooltipProvider delayDuration={300}>
     <div className="flex flex-1 min-h-0 min-w-0 relative">
@@ -1904,15 +2051,10 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
               </div>
               <div className={cn(
                 viewMode === 'grid'
-                  ? cn(
-                    "grid gap-3",
-                    hasSnippetsSidePanel
-                      ? "grid-cols-1"
-                      : "grid-cols-1 md:grid-cols-2 xl:grid-cols-3",
-                  )
+                  ? "grid gap-3"
                   : "flex flex-col gap-0"
               )}
-              style={splitViewGridStyle}
+              style={snippetGridStyle}
               >
                 {displayedPackages.map((pkg) => (
                   <ContextMenu key={pkg.path}>
@@ -1983,141 +2125,36 @@ const SnippetsManager: React.FC<SnippetsManagerProps> = ({
           {displayedSnippets.length > 0 && (
             <div className="space-y-2">
               <h3 className={vaultSectionTitleClass}>{t('snippets.section.snippets')}</h3>
-              <div className={cn(
-                viewMode === 'grid'
-                  ? cn(
-                    "grid gap-3",
-                    hasSnippetsSidePanel
-                      ? "grid-cols-1"
-                      : "grid-cols-1 md:grid-cols-2 xl:grid-cols-3",
-                  )
-                  : "flex flex-col gap-0"
+              {shouldVirtualizeSnippets ? (
+                <VirtualizedHostCollection
+                  items={displayedSnippets}
+                  itemKey={(snippet) => snippet.id}
+                  scrollRef={listRef}
+                  viewMode={viewMode}
+                  layoutKey={snippetCollectionLayoutKey}
+                  ariaLabel={t('vault.nav.snippets')}
+                  getColumnCount={(width, mode) => (
+                    mode === 'grid'
+                      ? getSnippetsGridColumnCount(width, { hasSidePanel: hasSnippetsSidePanel })
+                      : 1
+                  )}
+                  renderItem={renderSnippetItem}
+                />
+              ) : (
+                <div className={cn(
+                  viewMode === 'grid'
+                    ? "grid gap-3"
+                    : "flex flex-col gap-0"
+                )}
+                style={snippetGridStyle}
+                >
+                  {displayedSnippets.map((snippet) => (
+                    <React.Fragment key={snippet.id}>
+                      {renderSnippetItem(snippet)}
+                    </React.Fragment>
+                  ))}
+                </div>
               )}
-              style={splitViewGridStyle}
-              >
-                {displayedSnippets.map((snippet) => {
-                  const isSelected = selectedSnippetIds.has(snippet.id);
-                  return (
-                  <ContextMenu key={snippet.id}>
-                    <ContextMenuTrigger>
-                      <div
-                        className={cn(
-                          "vault-drop-indicator-row group cursor-pointer overflow-hidden",
-                          isSelected && (viewMode === 'grid' ? "ring-2 ring-primary/45 bg-primary/5" : "bg-primary/5"),
-                          viewMode === 'grid'
-                            ? "soft-card elevate rounded-xl h-[68px] px-3 py-2"
-                            : "h-14 px-3 py-2 hover:bg-secondary/60 rounded-lg transition-colors"
-                        )}
-                        data-snippet-id={isSearchActive ? undefined : snippet.id}
-                        data-vault-grid-item={`snippet:${snippet.id}`}
-                        data-vault-reorder-grid={viewMode === 'grid' ? 'true' : undefined}
-                        data-vault-reorder-dragging={draggingSnippetId === snippet.id ? 'true' : undefined}
-                        draggable={!isSearchActive && !isMultiSelectMode}
-                        onDragStart={(e) => {
-                          e.dataTransfer.effectAllowed = 'move';
-                          e.dataTransfer.setData('snippet-id', snippet.id);
-                          draggingSnippetIdRef.current = snippet.id;
-                          setDraggingSnippetId(snippet.id);
-                          lastPreviewReorderRef.current = null;
-                        }}
-                        onClick={() => {
-                          if (isMultiSelectMode) {
-                            toggleSnippetSelection(snippet.id);
-                          } else {
-                            handleEdit(snippet);
-                          }
-                        }}
-                      >
-                        <div className="flex items-center gap-3 h-full min-w-0">
-                          {isMultiSelectMode && (
-                            <div
-                              className="shrink-0"
-                              onClick={(e) => {
-                                e.stopPropagation();
-                                toggleSnippetSelection(snippet.id);
-                              }}
-                            >
-                              {isSelected ? (
-                                <CheckSquare size={18} className="text-primary" />
-                              ) : (
-                                <Square size={18} className="text-muted-foreground" />
-                              )}
-                            </div>
-                          )}
-                          <VaultEntityIcon
-                            className={isScriptSnippet(snippet) ? vaultAutomationScriptIconClass : vaultSnippetIconClass}
-                            icon={isScriptSnippet(snippet) ? (
-                              <Play size={18} />
-                            ) : (
-                              <Zap size={18} />
-                            )}
-                          />
-                          <div className="w-0 flex-1">
-                            <div className="text-sm font-semibold truncate">{snippet.label}</div>
-                            <Tooltip>
-                              <TooltipTrigger asChild>
-                                <div className="text-[11px] text-muted-foreground font-mono leading-4 truncate">
-                                  {flattenSnippetCommandPreview(snippet.command) || t('snippets.commandFallback')}
-                                </div>
-                              </TooltipTrigger>
-                              <TooltipContent side="bottom">
-                                <SnippetCommandTooltipContent
-                                  command={snippet.command}
-                                  fallback={t('snippets.commandFallback')}
-                                />
-                              </TooltipContent>
-                            </Tooltip>
-                          </div>
-                          {snippet.shortkey && (
-                            <div className="shrink-0 px-2 py-1 text-[10px] font-mono rounded border border-border bg-muted/50 text-muted-foreground">
-                              {snippet.shortkey}
-                            </div>
-                          )}
-                          {viewMode === 'list' && !isMultiSelectMode && (
-                            <Button
-                              variant="ghost"
-                              size="icon"
-                              className="h-8 w-8 opacity-0 group-hover:opacity-100 transition-opacity shrink-0"
-                              onClick={(e) => { e.stopPropagation(); handleEdit(snippet); }}
-                            >
-                              <Edit2 size={14} />
-                            </Button>
-                          )}
-                        </div>
-                      </div>
-                    </ContextMenuTrigger>
-                    <ContextMenuContent>
-                      <ContextMenuItem
-                        onClick={() => {
-                          const runTargets = getRunnableHostsForSnippet(snippet, hosts);
-                          if (runTargets.length > 0) {
-                            onRunSnippet?.(snippet, runTargets);
-                            return;
-                          }
-                          toast.error(t('scripts.actions.noRunnableHosts'));
-                        }}
-                        disabled={getRunnableHostsForSnippet(snippet, hosts).length === 0}
-                      >
-                        <Play className="mr-2 h-4 w-4" /> {t('action.run')}
-                      </ContextMenuItem>
-                      <ContextMenuSeparator />
-                      <ContextMenuItem onClick={() => handleEdit(snippet)}>
-                        <Edit2 className="mr-2 h-4 w-4" /> {t('action.edit')}
-                      </ContextMenuItem>
-                      <ContextMenuItem onClick={() => handleCopy(snippet.id, snippet.command)}>
-                        <Copy className="mr-2 h-4 w-4" /> {t('action.copy')}
-                      </ContextMenuItem>
-                      <ContextMenuItem onClick={() => exportSingleSnippet(snippet)}>
-                        <Download className="mr-2 h-4 w-4" /> {t('snippets.export.snippet')}
-                      </ContextMenuItem>
-                      <ContextMenuItem className="text-destructive" onClick={() => requestDeleteSnippet(snippet.id)}>
-                        <Trash2 className="mr-2 h-4 w-4" /> {t('action.delete')}
-                      </ContextMenuItem>
-                    </ContextMenuContent>
-                  </ContextMenu>
-                  );
-                })}
-              </div>
             </div>
           )}
           {search.trim() && displayedSnippets.length === 0 && (snippets.length > 0 || displayedPackages.length > 0) && (

components/Terminal.accentBase.test.ts

@@ -0,0 +1,24 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./Terminal.tsx", import.meta.url), "utf8");
+
+test("Terminal re-resolves catalog theme before applying store accent", () => {
+  // appearanceTheme may still carry a baked custom accent while TerminalLayer
+  // memo ignores accent churn. Switching accentMode back to `theme` must clear
+  // cursor/selection by starting from the clean catalog theme id.
+  assert.match(source, /useAppearanceChromeStore\(\)/);
+  assert.match(
+    source,
+    /getBuiltinTerminalThemeById\(appearanceTheme\.id\)/,
+  );
+  assert.match(
+    source,
+    /applyCustomAccentToTerminalTheme\(resolveBase\(\), accentMode, customAccent\)/,
+  );
+  assert.doesNotMatch(
+    source,
+    /if \(appearanceTheme\) return appearanceTheme;/,
+  );
+});

components/Terminal.tsx

@@ -66,6 +66,7 @@ import { useStoredBoolean } from "../application/state/useStoredBoolean";
 import { readOptionalStoredStringValue, useStoredString } from "../application/state/useStoredString";
 import { useSessionLogBackend } from "../application/state/useSessionLogBackend";
 import { useTerminalLayoutSuppressActive } from "../application/state/terminalLayoutSuppressStore";
+import { useAppearanceChromeStore } from "../application/state/appearanceChromeStore";
 import {
   shouldPublishPluginTerminalSessionMountLifecycle,
   usePluginTerminalSessionLifecycle,
@@ -260,8 +261,6 @@ const TerminalComponent: React.FC<TerminalProps> = ({
   fontSize,
   terminalTheme,
   followAppTerminalTheme = false,
-  accentMode = "theme",
-  customAccent = "",
   terminalSettings,
   sessionId,
   workspaceId,
@@ -1264,22 +1263,31 @@ const TerminalComponent: React.FC<TerminalProps> = ({
     });
   }, [availableFonts, fontFamilyId, hasFontFamilyOverride, host.fontFamily, terminalSettings?.fallbackFont]);
 
+  const { accentMode, customAccent } = useAppearanceChromeStore();
+
   const baseEffectiveTheme = useMemo(() => {
-    if (appearanceTheme) return appearanceTheme;
-    if (followAppTerminalTheme) {
-      return applyCustomAccentToTerminalTheme(terminalTheme, accentMode, customAccent);
-    }
-    const themeId = resolveHostTerminalThemeId(
-      { theme: host.theme, themeOverride: host.themeOverride } as Pick<Host, 'theme' | 'themeOverride'>,
-      terminalTheme.id,
-    );
-    let baseTheme = terminalTheme;
-    if (themeId) {
-      const hostTheme = getBuiltinTerminalThemeById(themeId)
-        || customThemes.find((t) => t.id === themeId);
-      if (hostTheme) baseTheme = hostTheme;
-    }
-    return applyCustomAccentToTerminalTheme(baseTheme, accentMode, customAccent);
+    // Always re-apply appearanceChromeStore accent. appearanceTheme from the
+    // layer may still carry a previously baked custom accent while TerminalLayer
+    // memo ignores accent churn — re-resolve the catalog theme by id first.
+    const resolveBase = (): typeof terminalTheme => {
+      if (appearanceTheme) {
+        const clean = getBuiltinTerminalThemeById(appearanceTheme.id)
+          || customThemes.find((t) => t.id === appearanceTheme.id);
+        if (clean) return clean;
+      }
+      if (followAppTerminalTheme) return terminalTheme;
+      const themeId = resolveHostTerminalThemeId(
+        { theme: host.theme, themeOverride: host.themeOverride } as Pick<Host, 'theme' | 'themeOverride'>,
+        terminalTheme.id,
+      );
+      if (themeId) {
+        const hostTheme = getBuiltinTerminalThemeById(themeId)
+          || customThemes.find((t) => t.id === themeId);
+        if (hostTheme) return hostTheme;
+      }
+      return terminalTheme;
+    };
+    return applyCustomAccentToTerminalTheme(resolveBase(), accentMode, customAccent);
   }, [accentMode, appearanceTheme, customAccent, customThemes, followAppTerminalTheme, host.theme, host.themeOverride, terminalTheme]);
 
   const resolvedChainHosts =

components/TerminalLayer.memo.test.tsx

@@ -217,6 +217,32 @@ test("TerminalLayer ignores shellHistory prop churn (reads shellHistoryStore ins
   );
 });
 
+test("TerminalLayer ignores notes prop churn (reads notesStore instead)", () => {
+  assert.equal(
+    terminalLayerAreEqual(
+      baseProps as never,
+      {
+        ...baseProps,
+        notes: [{ id: "n1", title: "One", content: "body", tags: [], createdAt: 1, updatedAt: 1, order: 1000 }],
+        noteGroups: ["Ops"],
+        updateNotes: () => {},
+        updateNoteGroups: () => {},
+      } as never,
+    ),
+    true,
+  );
+});
+
+test("TerminalLayer ignores customAccent prop churn (reads appearanceChromeStore instead)", () => {
+  assert.equal(
+    terminalLayerAreEqual(
+      baseProps as never,
+      { ...baseProps, accentMode: "custom", customAccent: "#ff00aa" } as never,
+    ),
+    true,
+  );
+});
+
 test("TerminalLayer ignores sessions dynamicTitle-only updates", () => {
   const sessionsA = [{
     id: "s1",

components/TerminalLayer.tsx

@@ -25,6 +25,7 @@ import { useStoredString } from '../application/state/useStoredString';
 import { useStoredNumber } from '../application/state/useStoredNumber';
 import { useStoredBoolean } from '../application/state/useStoredBoolean';
 import {
+  STORAGE_KEY_SIDE_PANEL_POSITION,
   STORAGE_KEY_SIDE_PANEL_WIDTH,
   STORAGE_KEY_TERMINAL_COMPOSE_BAR_OPEN,
 } from '../infrastructure/config/storageKeys';
@@ -173,8 +174,6 @@ const TerminalLayerInner: React.FC<TerminalLayerProps> = ({
   identities,
   snippets,
   snippetPackages,
-  notes,
-  noteGroups,
   openNoteRequest,
   onOpenVaultNoteFromChat,
   onOpenVaultHostFromChat,
@@ -237,8 +236,6 @@ const TerminalLayerInner: React.FC<TerminalLayerProps> = ({
   updateHosts,
   updateSnippets,
   updateSnippetPackages,
-  updateNotes,
-  updateNoteGroups,
   sftpDefaultViewMode,
   sftpDoubleClickBehavior,
   sftpAutoSync,
@@ -555,7 +552,7 @@ const TerminalLayerInner: React.FC<TerminalLayerProps> = ({
     { min: TERMINAL_SIDE_PANEL_MIN_WIDTH, max: TERMINAL_SIDE_PANEL_MAX_WIDTH },
   );
   const [sidePanelPosition, setSidePanelPosition] = useStoredString<'left' | 'right'>(
-    'netcatty_side_panel_position',
+    STORAGE_KEY_SIDE_PANEL_POSITION,
     'left',
     (v): v is 'left' | 'right' => v === 'left' || v === 'right',
   );
@@ -2165,8 +2162,6 @@ const TerminalLayerInner: React.FC<TerminalLayerProps> = ({
     programmaticCommandLogRewriteHandlersRef,
     snippetPackages,
     snippets,
-    noteGroups,
-    notes,
     onOpenVaultHostFromChat,
     onOpenVaultNoteFromChat: handleOpenVaultNoteFromAiPanel,
     onOpenVaultSectionFromChat,
@@ -2189,8 +2184,6 @@ const TerminalLayerInner: React.FC<TerminalLayerProps> = ({
     TooltipContent,
     TooltipTrigger,
     updateHosts,
-    updateNoteGroups,
-    updateNotes,
     updateSnippetPackages,
     updateSnippets,
     X,

components/VaultView.memo.test.tsx

@@ -1,29 +1,29 @@
 import test from "node:test";
 import assert from "node:assert/strict";
 
-import { vaultViewAreEqual } from "./VaultView.tsx";
+import { syncVaultViewMemoSection, vaultViewAreEqual } from "./VaultView.tsx";
+
+const baseProps = {
+  hosts: [],
+  keys: [],
+  identities: [],
+  proxyProfiles: [],
+  snippets: [],
+  snippetPackages: [],
+  notes: [],
+  noteGroups: [],
+  customGroups: [],
+  knownHosts: [],
+  connectionLogs: [],
+  sessions: [],
+  managedSources: [],
+  groupConfigs: {},
+  terminalThemeId: "default",
+  terminalFontSize: 14,
+  navigateToSection: null,
+};
 
 test("VaultView re-renders when an external section navigation request changes", () => {
-  const baseProps = {
-    hosts: [],
-    keys: [],
-    identities: [],
-    proxyProfiles: [],
-    snippets: [],
-    snippetPackages: [],
-    notes: [],
-    noteGroups: [],
-    customGroups: [],
-    knownHosts: [],
-    connectionLogs: [],
-    sessions: [],
-    managedSources: [],
-    groupConfigs: {},
-    terminalThemeId: "default",
-    terminalFontSize: 14,
-    navigateToSection: null,
-  };
-
   assert.equal(
     vaultViewAreEqual(
       baseProps as never,
@@ -34,26 +34,6 @@ test("VaultView re-renders when an external section navigation request changes",
 });
 
 test("VaultView memo does not depend on shellHistory prop identity", () => {
-  const baseProps = {
-    hosts: [],
-    keys: [],
-    identities: [],
-    proxyProfiles: [],
-    snippets: [],
-    snippetPackages: [],
-    notes: [],
-    noteGroups: [],
-    customGroups: [],
-    knownHosts: [],
-    connectionLogs: [],
-    sessions: [],
-    managedSources: [],
-    groupConfigs: {},
-    terminalThemeId: "default",
-    terminalFontSize: 14,
-    navigateToSection: null,
-  };
-  // History-only updates must not be part of VaultView equality (store path).
   assert.equal(
     vaultViewAreEqual(baseProps as never, { ...baseProps } as never),
     true,
@@ -65,26 +45,6 @@ test("VaultView memo does not depend on shellHistory prop identity", () => {
 });
 
 test("VaultView re-renders when proxy profiles change", () => {
-  const baseProps = {
-    hosts: [],
-    keys: [],
-    identities: [],
-    proxyProfiles: [],
-    snippets: [],
-    snippetPackages: [],
-    notes: [],
-    noteGroups: [],
-    customGroups: [],
-    knownHosts: [],
-    connectionLogs: [],
-    sessions: [],
-    managedSources: [],
-    groupConfigs: {},
-    terminalThemeId: "default",
-    terminalFontSize: 14,
-    navigateToSection: null,
-  };
-
   assert.equal(
     vaultViewAreEqual(
       baseProps as never,
@@ -105,38 +65,12 @@ test("VaultView re-renders when proxy profiles change", () => {
 });
 
 test("VaultView re-renders when host-key verification setting changes", () => {
-  const baseProps = {
-    hosts: [],
-    keys: [],
-    identities: [],
-    proxyProfiles: [],
-    snippets: [],
-    snippetPackages: [],
-    notes: [],
-    noteGroups: [],
-    customGroups: [],
-    knownHosts: [],
-    connectionLogs: [],
-    sessions: [],
-    managedSources: [],
-    groupConfigs: {},
-    terminalThemeId: "default",
-    terminalFontSize: 14,
-    navigateToSection: null,
-    terminalSettings: {
-      verifyHostKeys: true,
-      keepaliveInterval: 30,
-      keepaliveCountMax: 10,
-    },
-  };
-
   assert.equal(
     vaultViewAreEqual(
       baseProps as never,
       {
         ...baseProps,
         terminalSettings: {
-          ...baseProps.terminalSettings,
           verifyHostKeys: false,
         },
       } as never,
@@ -144,3 +78,35 @@ test("VaultView re-renders when host-key verification setting changes", () => {
     false,
   );
 });
+
+test("VaultView ignores connectionLogs identity when not on logs section", () => {
+  syncVaultViewMemoSection("hosts");
+  const nextLogs = [{ id: "log-1" }];
+  assert.equal(
+    vaultViewAreEqual(
+      baseProps as never,
+      { ...baseProps, connectionLogs: nextLogs } as never,
+    ),
+    true,
+  );
+});
+
+test("VaultView compares connectionLogs identity when on logs section", () => {
+  syncVaultViewMemoSection("logs");
+  const nextLogs = [{ id: "log-2" }];
+  assert.equal(
+    vaultViewAreEqual(
+      baseProps as never,
+      { ...baseProps, connectionLogs: nextLogs } as never,
+    ),
+    false,
+  );
+  assert.equal(
+    vaultViewAreEqual(
+      { ...baseProps, connectionLogs: nextLogs } as never,
+      { ...baseProps, connectionLogs: nextLogs } as never,
+    ),
+    true,
+  );
+  syncVaultViewMemoSection("hosts");
+});

components/VaultView.tsx

@@ -147,7 +147,7 @@ import { Badge } from "./ui/badge";
 import { HotkeyScheme, KeyBinding } from "../domain/models";
 import { VaultViewLayout } from "./vault/VaultViewLayout";
 import { useVaultHostCollections } from "./vault/useVaultHostCollections";
-import { useVaultImportHandlers } from "./vault/useVaultImportHandlers";
+import { useVaultImportHandlers } from "../application/state/useVaultImportHandlers";
 import { useVaultGroupDragHandlers } from "./vault/useVaultGroupDragHandlers";
 
 const LazyProtocolSelectDialog = lazy(() => import("./ProtocolSelectDialog"));
@@ -167,6 +167,16 @@ export type VaultSection =
   | "knownhosts"
   | "logs";
 
+/** Memo section tracker: areEqual ignores connectionLogs unless on logs. */
+let vaultViewMemoSection: VaultSection = "hosts";
+/** Always stashed from areEqual so skipped updates stay available when opening logs. */
+let vaultViewLatestConnectionLogs: ConnectionLog[] | null = null;
+
+/** Test/helper: sync the section used by vaultViewAreEqual. */
+export function syncVaultViewMemoSection(section: VaultSection): void {
+  vaultViewMemoSection = section;
+}
+
 const haveSameHostOrderResult = (previous: Host[], next: Host[]) => {
   if (previous.length !== next.length) return false;
   return next.every((host, index) => {
@@ -365,6 +375,8 @@ const VaultViewInner: React.FC<VaultViewProps> = ({
   const hostsRef = useRef(hosts);
   hostsRef.current = hosts;
   const [currentSection, setCurrentSection] = useState<VaultSection>("hosts");
+  vaultViewMemoSection = currentSection;
+  const resolvedConnectionLogs = vaultViewLatestConnectionLogs ?? connectionLogs;
   const [search, setSearch] = useState("");
   const [selectedGroupPath, setSelectedGroupPath] = useState<string | null>(
     null,
@@ -888,6 +900,7 @@ const VaultViewInner: React.FC<VaultViewProps> = ({
       hosts,
       keys,
       managedSources,
+      notify: toast,
       onReadPersistedHosts,
       onUpdateHosts,
       onUpdateKeys,
@@ -1414,7 +1427,7 @@ const VaultViewInner: React.FC<VaultViewProps> = ({
           Clock,
           cn,
           commitInlineGroupRename,
-          connectionLogs,
+          connectionLogs: resolvedConnectionLogs,
           connectSelectedHosts,
           ContextMenu,
           ContextMenuContent,
@@ -1667,6 +1680,11 @@ export const vaultViewAreEqual = (
   prev: VaultViewProps,
   next: VaultViewProps,
 ): boolean => {
+  vaultViewLatestConnectionLogs = next.connectionLogs;
+  const connectionLogsEqual =
+    vaultViewMemoSection === "logs"
+      ? prev.connectionLogs === next.connectionLogs
+      : true;
   const isEqual =
     prev.hosts === next.hosts &&
     prev.keys === next.keys &&
@@ -1679,7 +1697,7 @@ export const vaultViewAreEqual = (
     prev.customGroups === next.customGroups &&
     prev.knownHosts === next.knownHosts &&
     // shellHistory is not a VaultView prop; SnippetsManager reads shellHistoryStore.
-    prev.connectionLogs === next.connectionLogs &&
+    connectionLogsEqual &&
     prev.sessionCount === next.sessionCount &&
     prev.managedSources === next.managedSources &&
     prev.groupConfigs === next.groupConfigs &&

components/ai/ChatInput.tsx

@@ -37,7 +37,7 @@ import type { AgentModelPreset, AIPermissionMode, ProviderConfig, UploadedFile }
 import { ProviderIconBadge } from '../settings/tabs/ai/ProviderIconBadge';
 import { VariableSizeVirtualList, type VariableSizeVirtualListHandle } from '../ui/VariableSizeVirtualList';
 import { Tooltip, TooltipContent, TooltipTrigger } from '../ui/tooltip';
-import type { AgentContextUsage } from './hooks/useAgentCompactionUi';
+import type { AgentContextUsage } from '../../application/state/useAgentCompactionUi';
 import {
   CHAT_INPUT_DEFAULT_HEIGHT,
   CHAT_INPUT_MAX_HEIGHT,

components/ai/ChatMessageList.test.tsx

@@ -38,16 +38,24 @@ test("resolved approval state retains only tool calls still present in messages"
   assert.deepEqual([...next], [["live-call", false]]);
 });
 
-test("assistant content stays plain only when markdown is hidden", () => {
+test("assistant content stays plain when markdown is hidden or streaming", () => {
   assert.equal(shouldRenderAssistantAsPlainText({
     hideMarkdown: false,
   }), false);
   assert.equal(shouldRenderAssistantAsPlainText({
     hideMarkdown: true,
   }), true);
+  assert.equal(shouldRenderAssistantAsPlainText({
+    hideMarkdown: false,
+    isStreaming: true,
+  }), true);
+  assert.equal(shouldRenderAssistantAsPlainText({
+    hideMarkdown: false,
+    isStreaming: false,
+  }), false);
 });
 
-test("ChatMessageList renders markdown for the streaming assistant message", () => {
+test("ChatMessageList renders plain text for the streaming assistant message", () => {
   const messages: ChatMessage[] = [
     {
       id: "user-1",
@@ -75,15 +83,16 @@ test("ChatMessageList renders markdown for the streaming assistant message", ()
     ),
   );
 
-  assert.match(markup, /data-ai-content="markdown"/);
+  assert.match(markup, /data-ai-content="plain"/);
   assert.match(markup, /streaming-body/);
-  assert.doesNotMatch(markup, /data-ai-content="plain"/);
+  assert.doesNotMatch(markup, /data-ai-content="markdown"/);
 });
 
-test("streaming markdown keeps the renderer in its animating mode", () => {
+test("streaming assistant content skips Streamdown while the turn is live", () => {
   const source = readFileSync(new URL("./ChatMessageList.tsx", import.meta.url), "utf8");
 
-  assert.match(source, /LazyMessageResponse isAnimating=\{!!isThisStreaming\}/);
+  assert.match(source, /isStreaming: !!isThisStreaming/);
+  assert.match(source, /shouldRenderAssistantAsPlainText\(\{[\s\S]*?isStreaming/);
 });
 
 test("ChatMessageList hydrates markdown after streaming settles", () => {

components/ai/ChatMessageList.tsx

@@ -67,7 +67,7 @@ import {
   compactionStatusText,
   resolveCompactionStatusText,
   type ActiveCompactionUi,
-} from './hooks/useAgentCompactionUi';
+} from '../../application/state/useAgentCompactionUi';
 import {
   getAIPanelDiagnosticHiddenParts,
   getAIPanelProfilerProps,
@@ -113,8 +113,9 @@ export function shouldProvideVaultArtifactNavigation({
 
 export function shouldRenderAssistantAsPlainText(options: {
   hideMarkdown: boolean;
+  isStreaming?: boolean;
 }): boolean {
-  return options.hideMarkdown;
+  return options.hideMarkdown || !!options.isStreaming;
 }
 
 const ASSISTANT_PLAIN_TEXT_CLASS = 'whitespace-pre-wrap break-words text-[13px] leading-[1.45]';
@@ -702,6 +703,7 @@ const ChatMessageList: React.FC<ChatMessageListProps> = ({
                     ? <div className={ASSISTANT_PLAIN_TEXT_CLASS}>{message.content}</div>
                     : shouldRenderAssistantAsPlainText({
                         hideMarkdown,
+                        isStreaming: !!isThisStreaming,
                       })
                       ? (
                           <div
@@ -714,7 +716,7 @@ const ChatMessageList: React.FC<ChatMessageListProps> = ({
                       : (
                           <React.Profiler {...getAIPanelProfilerProps('AIChatPanel.Markdown')}>
                             <div data-ai-content="markdown">
-                              <LazyMessageResponse isAnimating={!!isThisStreaming}>
+                              <LazyMessageResponse isAnimating={false}>
                                 {message.content}
                               </LazyMessageResponse>
                             </div>

components/ai/aiPanelDiagnostics.test.ts

@@ -2,14 +2,19 @@ import assert from 'node:assert/strict';
 import test from 'node:test';
 
 const storage = new Map<string, string>();
+const localStorageStub = {
+  getItem: (key: string) => storage.get(key) ?? null,
+  setItem: (key: string, value: string) => { storage.set(key, value); },
+  removeItem: (key: string) => { storage.delete(key); },
+};
+Object.defineProperty(globalThis, 'localStorage', {
+  configurable: true,
+  value: localStorageStub,
+});
 Object.defineProperty(globalThis, 'window', {
   configurable: true,
   value: {
-    localStorage: {
-      getItem: (key: string) => storage.get(key) ?? null,
-      setItem: (key: string, value: string) => storage.set(key, value),
-      removeItem: (key: string) => storage.delete(key),
-    },
+    localStorage: localStorageStub,
   },
 });
 

components/ai/aiPanelDiagnostics.ts

@@ -1,81 +1,13 @@
-import type React from 'react';
-
-export const AI_PANEL_DIAGNOSTIC_HIDE_KEY = 'netcatty.aiDebug.hide';
-export const AI_PANEL_DIAGNOSTIC_PROFILE_KEY = 'netcatty.aiDebug.profile';
-export const AI_PANEL_FORCE_HIDE_ALL_CONTENT = false;
-export const AI_PANEL_FORCE_HIDE_SHELL = false;
-
-export type AIPanelDiagnosticPart =
-  | 'all'
-  | 'attachments'
-  | 'header'
-  | 'history'
-  | 'input'
-  | 'markdown'
-  | 'messages'
-  | 'recent'
-  | 'toolcalls';
-
-function readLocalStorageValue(key: string): string {
-  if (typeof window === 'undefined') return '';
-  try {
-    return window.localStorage.getItem(key) ?? '';
-  } catch {
-    return '';
-  }
-}
-
-export function getAIPanelDiagnosticHiddenParts(): ReadonlySet<string> {
-  if (AI_PANEL_FORCE_HIDE_ALL_CONTENT) {
-    return new Set(['all']);
-  }
-  const raw = readLocalStorageValue(AI_PANEL_DIAGNOSTIC_HIDE_KEY);
-  return new Set(
-    raw
-      .split(',')
-      .map((part) => part.trim().toLowerCase())
-      .filter(Boolean),
-  );
-}
-
-export function isAIPanelDiagnosticPartHidden(
-  part: AIPanelDiagnosticPart,
-  hiddenParts = getAIPanelDiagnosticHiddenParts(),
-): boolean {
-  return hiddenParts.has('all') || hiddenParts.has(part);
-}
-
-export function isAIPanelDiagnosticsProfilingEnabled(): boolean {
-  const raw = readLocalStorageValue(AI_PANEL_DIAGNOSTIC_PROFILE_KEY).trim().toLowerCase();
-  return raw === '1' || raw === 'true' || raw === 'yes' || raw === 'on';
-}
-
-export function logAIPanelProfiler(
-  id: string,
-  phase: 'mount' | 'update' | 'nested-update',
-  actualDuration: number,
-  baseDuration: number,
-): void {
-  if (!isAIPanelDiagnosticsProfilingEnabled()) return;
-  console.info(
-    `[AI panel profile] ${id} ${phase}: actual=${actualDuration.toFixed(1)}ms base=${baseDuration.toFixed(1)}ms`,
-  );
-}
-
-export function profileAIPanelCalculation<T>(label: string, calculate: () => T): T {
-  if (!isAIPanelDiagnosticsProfilingEnabled()) return calculate();
-  const startedAt = performance.now();
-  try {
-    return calculate();
-  } finally {
-    const elapsed = performance.now() - startedAt;
-    console.info(`[AI panel profile] ${label}: ${elapsed.toFixed(1)}ms`);
-  }
-}
-
-export function getAIPanelProfilerProps(id: string): Pick<React.ProfilerProps, 'id' | 'onRender'> {
-  return {
-    id,
-    onRender: logAIPanelProfiler,
-  };
-}
+export {
+  AI_PANEL_DIAGNOSTIC_HIDE_KEY,
+  AI_PANEL_DIAGNOSTIC_PROFILE_KEY,
+  AI_PANEL_FORCE_HIDE_ALL_CONTENT,
+  AI_PANEL_FORCE_HIDE_SHELL,
+  getAIPanelDiagnosticHiddenParts,
+  getAIPanelProfilerProps,
+  isAIPanelDiagnosticPartHidden,
+  isAIPanelDiagnosticsProfilingEnabled,
+  logAIPanelProfiler,
+  profileAIPanelCalculation,
+  type AIPanelDiagnosticPart,
+} from '../../application/state/aiPanelDiagnostics';

components/ai/hooks/aiChatStreamingSupport.ts

@@ -1,288 +1,2 @@
-import type { NetcattyBridge } from '../../../infrastructure/ai/cattyAgent/executor';
-import type {
-  OpenAIChatAssistantFields,
-  ProviderContinuationOptions,
-  ProviderContinuationSource,
-} from '../../../infrastructure/ai/providerContinuation';
-
-/** Shape of a text/text-delta chunk from the Vercel AI SDK stream. */
-export interface TextDeltaChunk {
-  type: 'text' | 'text-delta';
-  text?: string;
-  textDelta?: string;
-  providerMetadata?: unknown;
-}
-
-/** Shape of a reasoning chunk from the Vercel AI SDK stream. */
-export interface ReasoningChunk {
-  type: 'reasoning' | 'reasoning-start' | 'reasoning-delta';
-  text?: string;
-  textDelta?: string;
-  delta?: string;
-  providerMetadata?: unknown;
-}
-
-/** Shape of a raw provider chunk from the Vercel AI SDK stream. */
-export interface RawChunk {
-  type: 'raw';
-  rawValue: unknown;
-}
-
-/** Shape of a tool-call chunk from the Vercel AI SDK stream. */
-export interface ToolCallChunk {
-  type: 'tool-call';
-  toolCallId: string;
-  toolName: string;
-  input?: unknown;
-  args?: unknown;
-  providerMetadata?: unknown;
-}
-
-/** Shape of a tool-result chunk from the Vercel AI SDK stream. */
-export interface ToolResultChunk {
-  type: 'tool-result';
-  toolCallId: string;
-  output?: unknown;
-  result?: unknown;
-}
-
-/** Shape of a tool-error chunk from the Vercel AI SDK stream. */
-export interface ToolErrorChunk {
-  type: 'tool-error';
-  toolCallId: string;
-  toolName?: string;
-  error?: unknown;
-}
-
-/** Shape of a tool-output-denied chunk from the Vercel AI SDK stream. */
-export interface ToolOutputDeniedChunk {
-  type: 'tool-output-denied';
-  toolCallId: string;
-  toolName?: string;
-}
-
-/** Nested tool call reference on approval stream chunks. */
-export interface StreamChunkToolCallRef {
-  toolCallId: string;
-  toolName: string;
-  input?: unknown;
-  args?: unknown;
-}
-
-/** Shape of a tool-approval-response chunk from the Vercel AI SDK stream. */
-export interface ToolApprovalResponseChunk {
-  type: 'tool-approval-response';
-  approvalId?: string;
-  approved?: boolean;
-  reason?: string;
-  toolCallId?: string;
-  toolName?: string;
-  toolCall?: StreamChunkToolCallRef;
-}
-
-/** Resolve toolCallId from flat or nested approval/tool chunks. */
-export function resolveStreamChunkToolCallId(chunk: {
-  toolCallId?: string;
-  toolCall?: { toolCallId?: string };
-}): string | undefined {
-  return chunk.toolCallId ?? chunk.toolCall?.toolCallId;
-}
-
-/** Format tool execution failures for model/UI consumption. */
-export function formatToolErrorContent(error: unknown, fallback = 'Tool execution failed.'): string {
-  if (error instanceof Error) return JSON.stringify({ error: error.message });
-  if (typeof error === 'string') return JSON.stringify({ error });
-  if (error != null && typeof error === 'object' && 'error' in error) {
-    return JSON.stringify(error);
-  }
-  return JSON.stringify({ error: fallback });
-}
-
-/** Detect tool results that represent errors/denials (e.g. `{ error: "..." }` or `{ ok: false }`) */
-export function isToolResultError(output: unknown): boolean {
-  if (output == null) return false;
-  
-  if (typeof output === 'object') {
-    const obj = output as Record<string, unknown>;
-    // Check for explicit error objects
-    if ('error' in obj && typeof obj.error === 'string') return true;
-    if ('ok' in obj && obj.ok === false) return true;
-  }
-  
-  // Check stringified JSON (common for tool result wrapping)
-  if (typeof output === 'string') {
-    try {
-      const parsed = JSON.parse(output);
-      if (parsed && typeof parsed === 'object') {
-        const parsedObj = parsed as Record<string, unknown>;
-        if ('error' in parsedObj && typeof parsedObj.error === 'string') return true;
-        if ('ok' in parsedObj && parsedObj.ok === false) return true;
-      }
-    } catch { /* not JSON, not an error */ }
-  }
-  
-  return false;
-}
-
-/** Shape of an error chunk from the Vercel AI SDK stream. */
-export interface ErrorChunk {
-  type: 'error';
-  error: unknown;
-}
-
-/** Union of all stream chunk shapes we handle. */
-export type StreamChunk =
-  | TextDeltaChunk
-  | ReasoningChunk
-  | ToolCallChunk
-  | ToolResultChunk
-  | ToolErrorChunk
-  | ToolOutputDeniedChunk
-  | ToolApprovalResponseChunk
-  | ErrorChunk
-  | RawChunk
-  | { type: 'reasoning-end' | 'text-start' | 'text-end' | 'start' | 'finish' | 'start-step' | 'finish-step' | 'tool-approval-request'; approvalId?: string; toolCallId?: string; toolName?: string; approved?: boolean; toolCall?: StreamChunkToolCallRef; input?: unknown; args?: unknown };
-
-/** Shape of the netcatty bridge exposed on `window` (panel-specific subset). */
-export interface PanelBridge extends NetcattyBridge {
-  credentialsDecrypt?: (value: string) => Promise<string>;
-  aiSyncProviders?: (providers: Array<{ id: string; providerId: string; apiKey?: string; baseURL?: string; enabled: boolean }>) => Promise<{ ok: boolean }>;
-  aiSyncWebSearch?: (apiHost: string | null, apiKey: string | null) => Promise<{ ok: boolean }>;
-  aiMcpUpdateSessions?: (sessions: TerminalSessionInfo[], chatSessionId?: string) => Promise<unknown>;
-  aiMcpUpdateAttachments?: (
-    attachments: Array<{ base64Data?: string; mediaType?: string; filename?: string; filePath?: string }>,
-    chatSessionId?: string,
-  ) => Promise<unknown>;
-  aiSdkAgentListModels?: (
-    sdkBackend: string,
-    cwd?: string,
-    providerId?: string,
-    chatSessionId?: string,
-    agentEnv?: Record<string, string>,
-    agentCommand?: string,
-    codexRuntime?: 'sdk' | 'app-server',
-  ) => Promise<{ ok: boolean; models?: Array<{ id: string; name: string; description?: string; thinkingLevels?: string[]; defaultThinkingLevel?: string }>; currentModelId?: string | null; warning?: string; error?: string }>;
-  aiCattyCancelExec?(chatSessionId: string): Promise<unknown>;
-  aiSetChatSessionCancelled?(chatSessionId: string, cancelled?: boolean): Promise<{ ok: boolean; error?: string }>;
-  aiMcpSyncPermissionGrants?(grants: Array<Record<string, unknown>>): Promise<{ ok: boolean; count?: number; error?: string }>;
-  aiSdkAgentCancel?: (requestId: string, chatSessionId?: string) => Promise<{ ok: boolean; error?: string }>;
-  aiSdkAgentSteer?: (
-    requestId: string,
-    chatSessionId: string,
-    prompt: string,
-    images: Array<{ base64Data: string; mediaType: string; filename?: string; filePath?: string }> | undefined,
-    clientUserMessageId: string,
-  ) => Promise<{
-    status: 'accepted' | 'not-steerable' | 'busy' | 'inactive' | 'unsupported' | 'cancelled' | 'failed';
-    message?: string;
-    turnKind?: 'review' | 'compact';
-  }>;
-  aiSdkAgentCleanup?: (chatSessionId: string) => Promise<{ ok: boolean }>;
-  aiUserSkillsGetStatus?: () => Promise<{
-    ok: boolean;
-    skills?: Array<{
-      id: string;
-      slug: string;
-      name: string;
-      description: string;
-      status: 'ready' | 'warning';
-    }>;
-  }>;
-  aiUserSkillsBuildContext?: (prompt: string, selectedSkillSlugs?: string[]) => Promise<{ ok: boolean; context?: string; error?: string }>;
-  [key: string]: ((...args: unknown[]) => unknown) | undefined;
-}
-
-/** Terminal session info used throughout the streaming hooks. */
-export interface TerminalSessionInfo {
-  sessionId: string;
-  hostId: string;
-  hostname: string;
-  label: string;
-  os?: string;
-  username?: string;
-  protocol?: string;
-  shellType?: string;
-  deviceType?: string;
-  connected: boolean;
-  hostChain?: Array<{ hostId: string; label?: string; hostname?: string }>;
-  activePortForwards?: Array<{
-    ruleId: string;
-    label?: string;
-    type?: string;
-    localPort?: number;
-    status?: string;
-  }>;
-}
-
-export interface DefaultTargetSessionHint extends TerminalSessionInfo {
-  source: 'scope-target' | 'only-connected-in-scope';
-}
-
-export interface CattyProviderContinuationContext {
-  source: ProviderContinuationSource;
-  openAIChatAssistantFields: Array<OpenAIChatAssistantFields | undefined>;
-}
-
-export type AssistantContentPart =
-  | { type: 'reasoning'; text: string; providerOptions?: ProviderContinuationOptions }
-  | { type: 'text'; text: string; providerOptions?: ProviderContinuationOptions }
-  | { type: 'tool-call'; toolCallId: string; toolName: string; input: unknown; providerOptions?: ProviderContinuationOptions };
-
-export function toAssistantModelContent(parts: AssistantContentPart[]): string | AssistantContentPart[] {
-  if (parts.length === 1 && parts[0].type === 'text' && !parts[0].providerOptions) {
-    return parts[0].text;
-  }
-  return parts;
-}
-
-/** Typed accessor for the netcatty bridge on the window object. */
-export function getNetcattyBridge(): PanelBridge | undefined {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  return (window as any).netcatty as PanelBridge | undefined;
-}
-
-// ApprovalInfo and PendingApprovalContext removed — approval is now handled
-// inside the tool's execute function via the approvalGate module.
-
-export function generateId(): string {
-  return `msg-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
-}
-
-const USER_SKILLS_CONTEXT_TIMEOUT_MS = 500;
-
-interface UserSkillsContextResult {
-  ok: boolean;
-  context?: string;
-  error?: string;
-}
-
-function buildExplicitUserSkillsFallback(selectedUserSkillSlugs?: string[]): string {
-  if (!selectedUserSkillSlugs?.length) return '';
-  return `The user explicitly selected these Netcatty user skills for this request: ${selectedUserSkillSlugs.map((slug) => `/${slug}`).join(', ')}. Honor those selections even if their expanded skill content is unavailable.`;
-}
-
-export async function resolveUserSkillsContext(
-  bridge: PanelBridge | undefined,
-  prompt: string,
-  selectedUserSkillSlugs?: string[],
-): Promise<string> {
-  if (!bridge?.aiUserSkillsBuildContext) {
-    return buildExplicitUserSkillsFallback(selectedUserSkillSlugs);
-  }
-
-  const buildContextPromise: Promise<UserSkillsContextResult> = bridge
-    .aiUserSkillsBuildContext(prompt, selectedUserSkillSlugs)
-    .catch(() => ({ ok: false, context: '' }));
-
-  const hasExplicitSelections = (selectedUserSkillSlugs?.length ?? 0) > 0;
-  const result = hasExplicitSelections
-    ? await buildContextPromise
-    : await Promise.race([
-        buildContextPromise,
-        new Promise<UserSkillsContextResult>((resolve) =>
-          setTimeout(() => resolve({ ok: false, context: '' }), USER_SKILLS_CONTEXT_TIMEOUT_MS),
-        ),
-      ]);
-
-  return result.context || buildExplicitUserSkillsFallback(selectedUserSkillSlugs);
-}
+/** @deprecated Import from `@/infrastructure/ai/aiChatStreamingSupport` instead. */
+export * from '../../../infrastructure/ai/aiChatStreamingSupport';

components/editor/UnsavedChangesDialog.test.ts

@@ -0,0 +1,16 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const source = readFileSync(new URL("./UnsavedChangesDialog.tsx", import.meta.url), "utf8");
+
+test("unsaved prompt singleton registers during render, not only in useEffect", () => {
+  // AppView close / Cmd+W call promptUnsavedChanges outside the render-prop.
+  // Assigning only in useEffect leaves a first-paint window where the
+  // singleton is null and dirty closes silently resolve to "cancel".
+  assert.match(source, /promptSingleton = prompt;/);
+  assert.doesNotMatch(
+    source,
+    /useEffect\(\(\) => \{\s*promptSingleton = prompt;/,
+  );
+});

components/editor/UnsavedChangesDialog.tsx

@@ -41,12 +41,12 @@ export const UnsavedChangesProvider: React.FC<{
     [],
   );
 
-  // Register the prompt function as the module-level singleton so it can be
-  // called from outside the React tree (e.g. useSftpViewPaneActions).
-  useEffect(() => {
-    promptSingleton = prompt;
-    return () => { promptSingleton = null; };
-  }, [prompt]);
+  // Keep the singleton current during render so AppView close handlers and
+  // hotkeys never race the post-commit useEffect registration window.
+  promptSingleton = prompt;
+  useEffect(() => () => {
+    promptSingleton = null;
+  }, []);
 
   // On unmount, resolve any in-flight prompt as "cancel" so awaiting callers don't leak.
   useEffect(() => () => {

components/knownHostsGridLayout.ts

@@ -0,0 +1,10 @@
+/** Container-width column policy (mirrors former 2 / sm:3 / xl:4 breakpoints). */
+const KNOWN_HOSTS_SM_MIN_WIDTH = 640;
+const KNOWN_HOSTS_XL_MIN_WIDTH = 1280;
+
+export function getKnownHostsGridColumnCount(width: number): number {
+  if (!Number.isFinite(width) || width <= 0) return 2;
+  if (width >= KNOWN_HOSTS_XL_MIN_WIDTH) return 4;
+  if (width >= KNOWN_HOSTS_SM_MIN_WIDTH) return 3;
+  return 2;
+}

components/notes/NotesManager.test.tsx

@@ -246,12 +246,28 @@ test("NotesManager shows placeholder label for notes without titles", () => {
   assert.match(markup, /Note title/);
 });
 
+test("NotesManager flushes drafts on pagehide/beforeunload", () => {
+  const source = readFileSync(new URL("./NotesManager.tsx", import.meta.url), "utf8");
+  assert.match(source, /addEventListener\("pagehide"/);
+  assert.match(source, /addEventListener\("beforeunload"/);
+  assert.match(source, /flushNoteDraft/);
+});
+
+test("NotesManager flushes drafts when retained mounts become inactive", () => {
+  const source = readFileSync(new URL("./NotesManager.tsx", import.meta.url), "utf8");
+  assert.match(source, /isActive\?: boolean/);
+  assert.match(source, /if \(isActive\) return;/);
+  assert.match(source, /useLayoutEffect\(\(\) => \{\s*if \(isActive\) return;/);
+  assert.match(source, /visibilitychange/);
+});
+
 test("NotesManager tree rename allows clearing note titles", () => {
   const source = readFileSync(new URL("./NotesManager.tsx", import.meta.url), "utf8");
   const renameBlock = source.match(/onRenameCommit=\{\(name\) => \{[\s\S]*?\}\}/)?.[0] ?? "";
 
-  assert.match(renameBlock, /saveNote\(\{ \.\.\.note, title: name\.trim\(\)/);
+  assert.match(renameBlock, /renameNoteFromTree\(note\.id, name\)/);
   assert.doesNotMatch(renameBlock, /if \(!title\) return/);
+  assert.match(source, /note\.id === noteId \? \{ \.\.\.note, title: nextTitle, updatedAt \}/);
 });
 
 test("NotesManager sidebar mode renders list without editor by default", () => {

components/notes/NotesManager.tsx

@@ -15,7 +15,7 @@ import {
   Upload,
   X,
 } from "lucide-react";
-import React, { lazy, Suspense, useCallback, useEffect, useMemo, useRef, useState } from "react";
+import React, { lazy, Suspense, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from "react";
 import { useI18n } from "../../application/i18n/I18nProvider";
 import { useApplicationBackend } from "../../application/state/useApplicationBackend";
 import { useStoredNumber } from "../../application/state/useStoredNumber";
@@ -121,6 +121,8 @@ export interface NotesManagerProps {
   onUpdateNoteGroups: (groups: string[]) => void;
   onOpenHost?: (host: Host, source?: { noteId: string }) => void;
   displayMode?: "full" | "sidebar";
+  /** When false (hidden retained mount), flush any pending draft immediately. */
+  isActive?: boolean;
   openNoteId?: string | null;
   openNoteRequestId?: number | null;
   /** Called after a one-shot openNoteId focus request has been applied. */
@@ -340,6 +342,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   onUpdateNoteGroups,
   onOpenHost,
   displayMode = "full",
+  isActive = true,
   openNoteId = null,
   openNoteRequestId = null,
   onOpenNoteIdHandled,
@@ -401,6 +404,97 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
     return cleaned;
   }, [onUpdateNotes]);
 
+  const NOTE_DRAFT_DEBOUNCE_MS = 300;
+  const draftNoteIdRef = useRef<string | null>(null);
+  const draftTitleRef = useRef<string | null>(null);
+  const draftContentRef = useRef<string | null>(null);
+  const draftTimerRef = useRef<number | null>(null);
+  const [draftNoteId, setDraftNoteId] = useState<string | null>(null);
+  const [draftTitle, setDraftTitle] = useState<string | null>(null);
+  const [draftContent, setDraftContent] = useState<string | null>(null);
+
+  const clearDraftTimer = useCallback(() => {
+    if (draftTimerRef.current !== null) {
+      window.clearTimeout(draftTimerRef.current);
+      draftTimerRef.current = null;
+    }
+  }, []);
+
+  const flushNoteDraft = useCallback(() => {
+    clearDraftTimer();
+    const noteId = draftNoteIdRef.current;
+    if (!noteId) return;
+    const title = draftTitleRef.current;
+    const content = draftContentRef.current;
+    draftNoteIdRef.current = null;
+    draftTitleRef.current = null;
+    draftContentRef.current = null;
+    setDraftNoteId(null);
+    setDraftTitle(null);
+    setDraftContent(null);
+    if (title === null && content === null) return;
+    commitNotes(sortedNotesRef.current.map((note) => {
+      if (note.id !== noteId) return note;
+      return {
+        ...note,
+        ...(title !== null ? { title } : {}),
+        ...(content !== null ? { content } : {}),
+        updatedAt: Date.now(),
+      };
+    }));
+  }, [clearDraftTimer, commitNotes]);
+
+  const scheduleNoteDraftFlush = useCallback(() => {
+    clearDraftTimer();
+    draftTimerRef.current = window.setTimeout(() => {
+      draftTimerRef.current = null;
+      flushNoteDraft();
+    }, NOTE_DRAFT_DEBOUNCE_MS);
+  }, [clearDraftTimer, flushNoteDraft]);
+
+  const updateNoteDraft = useCallback((noteId: string, fields: { title?: string; content?: string }) => {
+    if (draftNoteIdRef.current && draftNoteIdRef.current !== noteId) {
+      flushNoteDraft();
+    }
+    draftNoteIdRef.current = noteId;
+    setDraftNoteId(noteId);
+    if (fields.title !== undefined) {
+      draftTitleRef.current = fields.title;
+      setDraftTitle(fields.title);
+    }
+    if (fields.content !== undefined) {
+      draftContentRef.current = fields.content;
+      setDraftContent(fields.content);
+    }
+    scheduleNoteDraftFlush();
+  }, [flushNoteDraft, scheduleNoteDraftFlush]);
+
+  useEffect(() => () => {
+    flushNoteDraft();
+  }, [flushNoteDraft]);
+
+  useLayoutEffect(() => {
+    if (isActive) return;
+    flushNoteDraft();
+  }, [flushNoteDraft, isActive]);
+
+  useEffect(() => {
+    const flushOnTeardown = () => {
+      flushNoteDraft();
+    };
+    const flushOnHidden = () => {
+      if (document.visibilityState === "hidden") flushNoteDraft();
+    };
+    window.addEventListener("pagehide", flushOnTeardown);
+    window.addEventListener("beforeunload", flushOnTeardown);
+    document.addEventListener("visibilitychange", flushOnHidden);
+    return () => {
+      window.removeEventListener("pagehide", flushOnTeardown);
+      window.removeEventListener("beforeunload", flushOnTeardown);
+      document.removeEventListener("visibilitychange", flushOnHidden);
+    };
+  }, [flushNoteDraft]);
+
   const noteTree = useMemo(() => {
     const tree = buildNoteTree(groups, sortedNotes);
     return {
@@ -410,6 +504,26 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   }, [groupOrderByPath, groups, sortedNotes]);
   const selectedNote = getSelectedVaultNote(sortedNotes, selectedNoteId);
   const overlayNote = sortedNotes.find((note) => note.id === overlayNoteId) ?? null;
+  const selectedNoteView = selectedNote && draftNoteId === selectedNote.id
+    ? {
+        ...selectedNote,
+        ...(draftTitle !== null ? { title: draftTitle } : {}),
+        ...(draftContent !== null ? { content: draftContent } : {}),
+      }
+    : selectedNote;
+  const overlayNoteView = overlayNote && draftNoteId === overlayNote.id
+    ? {
+        ...overlayNote,
+        ...(draftTitle !== null ? { title: draftTitle } : {}),
+        ...(draftContent !== null ? { content: draftContent } : {}),
+      }
+    : overlayNote;
+
+  useEffect(() => {
+    if (!draftNoteIdRef.current) return;
+    if (draftNoteIdRef.current === selectedNoteId || draftNoteIdRef.current === overlayNoteId) return;
+    flushNoteDraft();
+  }, [flushNoteDraft, overlayNoteId, selectedNoteId]);
 
   useEffect(() => {
     const urls = activeDownloadUrlsRef.current;
@@ -496,8 +610,28 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   const expandAllGroups = () => setExpandedGroups(new Set(allGroupPaths));
   const collapseAllGroups = () => setExpandedGroups(new Set());
 
-  const saveNote = (nextNote: VaultNote) => {
-    commitNotes(sortedNotes.map((note) => (note.id === nextNote.id ? nextNote : note)));
+  /** Flush pending draft, then mutate from the post-flush ref snapshot. */
+  const commitNotesAfterFlush = useCallback((mutator: (notes: VaultNote[]) => VaultNote[]) => {
+    flushNoteDraft();
+    return commitNotes(mutator(sortedNotesRef.current));
+  }, [commitNotes, flushNoteDraft]);
+
+  /** Rename from the tree row: merge title into the post-flush note so an
+   *  unflushed body edit is not discarded by a stale tree-row snapshot. */
+  const renameNoteFromTree = (noteId: string, title: string) => {
+    const nextTitle = title.trim();
+    const updatedAt = Date.now();
+    commitNotesAfterFlush((notes) => notes.map((note) => (
+      note.id === noteId ? { ...note, title: nextTitle, updatedAt } : note
+    )));
+  };
+
+  const saveNoteTitleDraft = (note: VaultNote, title: string) => {
+    updateNoteDraft(note.id, { title });
+  };
+
+  const saveNoteContentDraft = (note: VaultNote, content: string) => {
+    updateNoteDraft(note.id, { content });
   };
 
   const handleOpenHostFromNote = useCallback((host: Host, noteId: string) => {
@@ -531,10 +665,14 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   };
 
   const addNoteToGroup = (group: string | null) => {
-    const note = createNote(group, getNextVaultOrder(sortedNotes));
-    commitNotes([...sortedNotes, note]);
+    let created: VaultNote | null = null;
+    commitNotesAfterFlush((notes) => {
+      created = createNote(group, getNextVaultOrder(notes));
+      return [...notes, created];
+    });
+    if (!created) return;
     if (group) expandPath(group);
-    const nextSelection = getNoteSelectionState(note, isSidebarMode);
+    const nextSelection = getNoteSelectionState(created, isSidebarMode);
     setSelectedNoteId(nextSelection.selectedNoteId);
     setSelectedGroup(nextSelection.selectedGroup);
     setOverlayNoteId(nextSelection.overlayNoteId);
@@ -591,7 +729,10 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
 
       const result = importMarkdownPayloadsToVaultNotes(
         payloads,
-        sortedNotesRef.current,
+        (() => {
+          flushNoteDraft();
+          return sortedNotesRef.current;
+        })(),
         targetGroup,
       );
 
@@ -623,6 +764,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   }, [
     isSidebarMode,
     commitNotes,
+    flushNoteDraft,
     selectedGroup,
     selectedNote,
     t,
@@ -645,10 +787,12 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   }, []);
 
   const exportNoteToMarkdown = useCallback((note: VaultNote) => {
+    flushNoteDraft();
+    const latest = sortedNotesRef.current.find((item) => item.id === note.id) ?? note;
     try {
-      const fileName = `${sanitizeNoteExportFileNamePart(note.title, "note")}.md`;
+      const fileName = `${sanitizeNoteExportFileNamePart(latest.title, "note")}.md`;
       downloadNotesBlob(
-        new Blob([note.content], { type: "text/markdown;charset=utf-8" }),
+        new Blob([latest.content], { type: "text/markdown;charset=utf-8" }),
         fileName,
       );
       toast.success(t("notes.export.toast.success", { count: 1 }));
@@ -656,9 +800,10 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
       logger.error("Failed to export note:", err);
       toast.error(t("notes.export.toast.failed"));
     }
-  }, [downloadNotesBlob, t]);
+  }, [downloadNotesBlob, flushNoteDraft, t]);
 
   const exportNotesToZip = useCallback((scope: VaultNotesExportScope, fileNamePart: string) => {
+    flushNoteDraft();
     try {
       const files = buildVaultNoteMarkdownExportFiles(sortedNotesRef.current, scope);
       if (files.length === 0) {
@@ -674,7 +819,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
       logger.error("Failed to export notes:", err);
       toast.error(t("notes.export.toast.failed"));
     }
-  }, [downloadNotesBlob, t]);
+  }, [downloadNotesBlob, flushNoteDraft, t]);
 
   const exportAllNotes = useCallback(() => {
     exportNotesToZip({ type: "all" }, "all");
@@ -703,7 +848,8 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   );
 
   const duplicateNoteById = (noteId: string) => {
-    const source = sortedNotes.find((note) => note.id === noteId);
+    flushNoteDraft();
+    const source = sortedNotesRef.current.find((note) => note.id === noteId);
     if (!source) return;
     const now = Date.now();
     const copy: VaultNote = {
@@ -712,9 +858,9 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
       title: `${source.title} (${t("action.copy")})`,
       createdAt: now,
       updatedAt: now,
-      order: getNextVaultOrder(sortedNotes),
+      order: getNextVaultOrder(sortedNotesRef.current),
     };
-    commitNotes([...sortedNotes, copy]);
+    commitNotes([...sortedNotesRef.current, copy]);
     if (copy.group) expandPath(copy.group);
     const nextSelection = getNoteSelectionState(copy, isSidebarMode);
     setSelectedNoteId(nextSelection.selectedNoteId);
@@ -723,8 +869,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   };
 
   const performDeleteNoteById = (noteId: string) => {
-    const next = sortedNotes.filter((note) => note.id !== noteId);
-    commitNotes(next);
+    const next = commitNotesAfterFlush((notes) => notes.filter((note) => note.id !== noteId));
     if (selectedNoteId === noteId) {
       const nextSelection = getFallbackNoteSelectionState(next, isSidebarMode);
       setSelectedNoteId(nextSelection.selectedNoteId);
@@ -772,12 +917,11 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
     const nextGroups = normalizeNoteGroups(
       groups.map((item) => replaceNoteGroupPrefix(item, group, nextPath) || ""),
     );
-    const nextNotes = sortedNotes.map((note) => ({
+    onUpdateNoteGroups(nextGroups);
+    commitNotesAfterFlush((notes) => notes.map((note) => ({
       ...note,
       group: replaceNoteGroupPrefix(note.group, group, nextPath),
-    }));
-    onUpdateNoteGroups(nextGroups);
-    commitNotes(nextNotes);
+    })));
     setExpandedGroups((current) => {
       const next = new Set<string>();
       current.forEach((item) => {
@@ -794,7 +938,9 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
 
   const performDeleteGroup = (group: string) => {
     onUpdateNoteGroups(groups.filter((item) => !isNoteGroupInside(item, group)));
-    commitNotes(sortedNotes.map((note) => isNoteGroupInside(note.group, group) ? { ...note, group: undefined } : note));
+    commitNotesAfterFlush((notes) => notes.map((note) => (
+      isNoteGroupInside(note.group, group) ? { ...note, group: undefined } : note
+    )));
     if (selectedGroup && isNoteGroupInside(selectedGroup, group)) setSelectedGroup(null);
     setEditingGroupPath(null);
   };
@@ -844,12 +990,13 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   };
 
   const moveNoteToGroup = (noteId: string, group: string | null) => {
-    const source = sortedNotes.find((note) => note.id === noteId);
+    flushNoteDraft();
+    const source = sortedNotesRef.current.find((note) => note.id === noteId);
     if (!source) return;
     const nextGroup = group || undefined;
     if ((source.group || undefined) === nextGroup) return;
 
-    commitNotes(sortedNotes.map((note) => (
+    commitNotes(sortedNotesRef.current.map((note) => (
       note.id === noteId ? { ...note, group: nextGroup, updatedAt: Date.now() } : note
     )));
     if (group) expandPath(group);
@@ -858,29 +1005,31 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
   const reorderNoteToNote = (sourceId: string, targetNote: VaultNote, event: React.DragEvent<HTMLElement>) => {
     if (!sourceId || sourceId === targetNote.id) return;
     const position = getVaultDropPosition(event.currentTarget, event.clientX, event.clientY);
-    const movedNotes = sortedNotes.map((note) => (
-      note.id === sourceId
-        ? { ...note, group: targetNote.group, updatedAt: Date.now() }
-        : note
-    ));
-    commitNotes(reorderVaultItems(movedNotes, sourceId, targetNote.id, position));
+    commitNotesAfterFlush((notes) => {
+      const movedNotes = notes.map((note) => (
+        note.id === sourceId
+          ? { ...note, group: targetNote.group, updatedAt: Date.now() }
+          : note
+      ));
+      return reorderVaultItems(movedNotes, sourceId, targetNote.id, position);
+    });
     if (targetNote.group) expandPath(targetNote.group);
   };
 
   const moveGroupToParent = (group: string, parent: string | null) => {
+    flushNoteDraft();
     const knownGroups = normalizeNoteGroups([
       ...groups,
-      ...sortedNotes.map((note) => note.group).filter((item): item is string => Boolean(item)),
+      ...sortedNotesRef.current.map((note) => note.group).filter((item): item is string => Boolean(item)),
     ]);
     const nextPath = resolveMovedNoteGroupPath(group, parent, knownGroups);
     if (!nextPath) return;
     const nextGroups = normalizeNoteGroups(groups.map((item) => replaceNoteGroupPrefix(item, group, nextPath) || ""));
-    const nextNotes = sortedNotes.map((note) => ({
+    onUpdateNoteGroups(nextGroups);
+    commitNotes(sortedNotesRef.current.map((note) => ({
       ...note,
       group: replaceNoteGroupPrefix(note.group, group, nextPath),
-    }));
-    onUpdateNoteGroups(nextGroups);
-    commitNotes(nextNotes);
+    })));
     setExpandedGroups((current) => remapExpandedNoteGroupPaths(current, group, nextPath));
     if (selectedGroup && isNoteGroupInside(selectedGroup, group)) {
       setSelectedGroup(replaceNoteGroupPrefix(selectedGroup, group, nextPath) ?? null);
@@ -895,10 +1044,11 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
     if (!sourceGroup || !targetGroup || sourceGroup === targetGroup) return;
     if (targetGroup.startsWith(`${sourceGroup}/`)) return;
 
+    flushNoteDraft();
     const targetParent = getNoteGroupParentPath(targetGroup);
     const knownGroups = normalizeNoteGroups([
       ...groups,
-      ...sortedNotes.map((note) => note.group).filter((item): item is string => Boolean(item)),
+      ...sortedNotesRef.current.map((note) => note.group).filter((item): item is string => Boolean(item)),
     ]);
     const nextSourceGroup = getNoteGroupParentPath(sourceGroup) === targetParent
       ? cleanNoteGroupPath(sourceGroup)
@@ -916,16 +1066,13 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
       targetGroup,
       position,
     );
-    const nextNotes = nextSourceGroup === sourceGroup
-      ? sortedNotes
-      : sortedNotes.map((note) => ({
-        ...note,
-        group: replaceNoteGroupPrefix(note.group, sourceGroup, nextSourceGroup),
-      }));
 
     onUpdateNoteGroups(nextGroups);
     if (nextSourceGroup !== sourceGroup) {
-      commitNotes(nextNotes);
+      commitNotes(sortedNotesRef.current.map((note) => ({
+        ...note,
+        group: replaceNoteGroupPrefix(note.group, sourceGroup, nextSourceGroup),
+      })));
       setExpandedGroups((current) => remapExpandedNoteGroupPaths(current, sourceGroup, nextSourceGroup));
       if (selectedGroup && isNoteGroupInside(selectedGroup, sourceGroup)) {
         setSelectedGroup(replaceNoteGroupPrefix(selectedGroup, sourceGroup, nextSourceGroup) ?? null);
@@ -1092,7 +1239,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
             editingInitialName={note.title}
             onRenameCommit={(name) => {
               setEditingNoteId(null);
-              saveNote({ ...note, title: name.trim(), updatedAt: Date.now() });
+              renameNoteFromTree(note.id, name);
             }}
             onRenameCancel={() => setEditingNoteId(null)}
             icon={<FileText size={16} className="mr-2 shrink-0 text-muted-foreground" />}
@@ -1515,41 +1662,41 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
 
         {!isSidebarMode && (
         <main className="flex min-w-0 flex-1 flex-col bg-background">
-          {selectedNote ? (
+          {selectedNoteView ? (
             <>
               <div className="flex min-h-[54px] shrink-0 items-center gap-3 px-8 pt-6 pb-1" data-note-title-row>
                 <div className="min-w-0 flex-1">
                   <input
                     className="h-8 w-full bg-transparent text-lg font-semibold leading-8 outline-none placeholder:text-muted-foreground"
-                    value={selectedNote.title}
+                    value={selectedNoteView.title}
                     placeholder={t("notes.title.placeholder")}
-                    onChange={(event) => saveNote({
-                      ...selectedNote,
-                      title: event.target.value,
-                      updatedAt: Date.now(),
-                    })}
+                    onChange={(event) => saveNoteTitleDraft(selectedNoteView, event.target.value)}
+                    onBlur={() => flushNoteDraft()}
                   />
                 </div>
-                {renderNoteExportButton(selectedNote)}
+                {renderNoteExportButton(selectedNoteView)}
                 {renderNoteModeToggle()}
               </div>
               <ScrollArea className="min-h-0 flex-1">
-                <div className="min-h-full w-full px-8 pt-2 pb-6">
-                  <LazyLoadBoundary name="Notes editor" resetKey={selectedNote.id}>
+                <div
+                  className="min-h-full w-full px-8 pt-2 pb-6"
+                  onBlur={(event) => {
+                    if (!event.currentTarget.contains(event.relatedTarget as Node | null)) {
+                      flushNoteDraft();
+                    }
+                  }}
+                >
+                  <LazyLoadBoundary name="Notes editor" resetKey={selectedNoteView.id}>
                     <Suspense fallback={<InlineMarkdownEditorFallback />}>
                       <InlineMarkdownEditor
-                        key={selectedNote.id}
-                        value={selectedNote.content}
+                        key={selectedNoteView.id}
+                        value={selectedNoteView.content}
                         placeholder={t("notes.editor.placeholder")}
                         editorMode={noteEditorMode}
                         previewEmptyLabel={t("notes.preview.empty")}
-                        onChange={(content) => saveNote({
-                          ...selectedNote,
-                          content,
-                          updatedAt: Date.now(),
-                        })}
+                        onChange={(content) => saveNoteContentDraft(selectedNoteView, content)}
                         hosts={hosts}
-                        onOpenHost={(host) => handleOpenHostFromNote(host, selectedNote.id)}
+                        onOpenHost={(host) => handleOpenHostFromNote(host, selectedNoteView.id)}
                         onOpenExternalLink={openExternal}
                       />
                     </Suspense>
@@ -1582,7 +1729,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
         )}
       </div>
 
-      {isSidebarMode && overlayNote && (
+      {isSidebarMode && overlayNoteView && (
         <div className="absolute inset-0 z-30 flex min-h-0 flex-col bg-background text-foreground">
           <div className={cn(
             TERMINAL_SIDE_PANEL_INNER_HEADER_CLASS,
@@ -1602,7 +1749,7 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
               <TooltipContent side="bottom">{t("common.back")}</TooltipContent>
             </Tooltip>
             <div className="min-w-0 flex-1 truncate px-1 text-xs font-medium leading-4 text-foreground">
-              {overlayNote.title || t("notes.title.placeholder")}
+              {overlayNoteView.title || t("notes.title.placeholder")}
             </div>
           </div>
           <div className="flex min-h-0 flex-1 flex-col bg-background">
@@ -1610,35 +1757,35 @@ export const NotesManager: React.FC<NotesManagerProps> = ({
               <div className="min-w-0 flex-1">
                 <input
                   className="h-8 w-full bg-transparent text-lg font-semibold leading-8 outline-none placeholder:text-muted-foreground"
-                  value={overlayNote.title}
+                  value={overlayNoteView.title}
                   placeholder={t("notes.title.placeholder")}
-                  onChange={(event) => saveNote({
-                    ...overlayNote,
-                    title: event.target.value,
-                    updatedAt: Date.now(),
-                  })}
+                  onChange={(event) => saveNoteTitleDraft(overlayNoteView, event.target.value)}
+                  onBlur={() => flushNoteDraft()}
                 />
               </div>
-              {renderNoteExportButton(overlayNote)}
+              {renderNoteExportButton(overlayNoteView)}
               {renderNoteModeToggle()}
             </div>
             <ScrollArea className="min-h-0 flex-1">
-              <div className="min-h-full w-full px-4 pt-2 pb-6">
-                <LazyLoadBoundary name="Notes editor" resetKey={overlayNote.id}>
+              <div
+                className="min-h-full w-full px-4 pt-2 pb-6"
+                onBlur={(event) => {
+                  if (!event.currentTarget.contains(event.relatedTarget as Node | null)) {
+                    flushNoteDraft();
+                  }
+                }}
+              >
+                <LazyLoadBoundary name="Notes editor" resetKey={overlayNoteView.id}>
                   <Suspense fallback={<InlineMarkdownEditorFallback />}>
                     <InlineMarkdownEditor
-                      key={overlayNote.id}
-                      value={overlayNote.content}
+                      key={overlayNoteView.id}
+                      value={overlayNoteView.content}
                       placeholder={t("notes.editor.placeholder")}
                       editorMode={noteEditorMode}
-                      onChange={(content) => saveNote({
-                        ...overlayNote,
-                        content,
-                        updatedAt: Date.now(),
-                      })}
+                      onChange={(content) => saveNoteContentDraft(overlayNoteView, content)}
                       previewEmptyLabel={t("notes.preview.empty")}
                       hosts={hosts}
-                      onOpenHost={(host) => handleOpenHostFromNote(host, overlayNote.id)}
+                      onOpenHost={(host) => handleOpenHostFromNote(host, overlayNoteView.id)}
                       onOpenExternalLink={openExternal}
                     />
                   </Suspense>

components/port-forwarding/hostKeyVerification.ts

@@ -1,56 +1,10 @@
-import type { KnownHost } from "../../domain/models";
-import { toHostKeyInfo, type HostKeyVerificationRequest } from "../terminal/hostKeyVerification";
-import type { HostKeyInfo } from "../terminal/TerminalHostKeyVerification";
-
-export const isPortForwardHostKeySessionId = (sessionId?: string): boolean => {
-  return typeof sessionId === "string" && sessionId.startsWith("pf-");
-};
-
-export type PortForwardHostKeyRequest = HostKeyVerificationRequest & {
-  requestId: string;
-  sessionId?: string;
-};
-
-export interface PendingPortForwardHostKeyVerification {
-  requestId: string;
-  hostKeyInfo: HostKeyInfo;
-}
-
-export const toPendingPortForwardHostKeyVerification = (
-  request: PortForwardHostKeyRequest,
-): PendingPortForwardHostKeyVerification | null => {
-  if (!isPortForwardHostKeySessionId(request.sessionId)) return null;
-  return {
-    requestId: request.requestId,
-    hostKeyInfo: toHostKeyInfo(request),
-  };
-};
-
-export const enqueuePortForwardHostKeyVerification = (
-  queue: PendingPortForwardHostKeyVerification[],
-  pending: PendingPortForwardHostKeyVerification,
-): PendingPortForwardHostKeyVerification[] => [...queue, pending];
-
-export const removePortForwardHostKeyVerification = (
-  queue: PendingPortForwardHostKeyVerification[],
-  requestId: string,
-): PendingPortForwardHostKeyVerification[] => {
-  if (queue[0]?.requestId === requestId) {
-    return queue.slice(1);
-  }
-  return queue.filter((pending) => pending.requestId !== requestId);
-};
-
-export const createKnownHostFromPortForwardHostKeyInfo = (
-  hostKeyInfo: HostKeyInfo,
-  now = Date.now(),
-  idSuffix = Math.random().toString(36).slice(2, 11),
-): KnownHost => ({
-  id: hostKeyInfo.knownHostId || `kh-${now}-${idSuffix}`,
-  hostname: hostKeyInfo.hostname,
-  port: hostKeyInfo.port || 22,
-  keyType: hostKeyInfo.keyType,
-  publicKey: hostKeyInfo.publicKey || `SHA256:${hostKeyInfo.fingerprint}`,
-  fingerprint: hostKeyInfo.fingerprint,
-  discoveredAt: now,
-});
+/** @deprecated Import from `@/domain/portForwardHostKey` instead. */
+export {
+  createKnownHostFromPortForwardHostKeyInfo,
+  enqueuePortForwardHostKeyVerification,
+  isPortForwardHostKeySessionId,
+  removePortForwardHostKeyVerification,
+  toPendingPortForwardHostKeyVerification,
+  type PendingPortForwardHostKeyVerification,
+  type PortForwardHostKeyRequest,
+} from "../../domain/portForwardHostKey";

components/settings/tabs/ai/ExternalMcpCard.tsx

@@ -2,26 +2,19 @@ import React, { useCallback, useEffect, useMemo, useState } from "react";
 import { Check, Copy, HelpCircle, RefreshCw } from "lucide-react";
 import { useI18n } from "../../../../application/i18n/I18nProvider";
 import {
-  normalizeExternalMcpIdleTimeoutMinutes,
-  normalizeExternalMcpMode,
-  normalizeSessionIdleTimeoutMinutes,
   readExternalMcpFocusOnHostOpen,
   readExternalMcpIdleTimeoutMinutes,
   readExternalMcpMode,
   readExternalMcpSilentSessions,
   readSessionIdleTimeoutMinutes,
   writeExternalMcpFocusOnHostOpen,
+  writeExternalMcpIdleTimeoutMinutes,
+  writeExternalMcpMode,
   writeExternalMcpSilentSessions,
+  writeSessionIdleTimeoutMinutes,
   type ExternalMcpMode,
   useExternalMcpToggleState,
 } from "../../../../application/state/useExternalMcpToggleState";
-import {
-  STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES,
-  STORAGE_KEY_AI_EXTERNAL_MCP_MODE,
-  STORAGE_KEY_AI_SESSION_IDLE_TIMEOUT_MINUTES,
-} from "../../../../infrastructure/config/storageKeys";
-import { localStorageAdapter } from "../../../../infrastructure/persistence/localStorageAdapter";
-import { emitAIStateChanged } from "../../../../application/state/aiStateEvents";
 import { cn } from "../../../../lib/utils";
 import { Button } from "../../../ui/button";
 import { Tooltip, TooltipContent, TooltipTrigger } from "../../../ui/tooltip";
@@ -328,26 +321,20 @@ export const ExternalMcpCard: React.FC = () => {
   }, []);
 
   const setMode = useCallback((nextMode: ExternalMcpMode) => {
-    const normalized = normalizeExternalMcpMode(nextMode);
+    const normalized = writeExternalMcpMode(nextMode);
     setModeRaw(normalized);
-    localStorageAdapter.writeString(STORAGE_KEY_AI_EXTERNAL_MCP_MODE, normalized);
-    emitAIStateChanged(STORAGE_KEY_AI_EXTERNAL_MCP_MODE);
     pushConfig(normalized, idleTimeoutMinutes, sessionIdleTimeoutMinutes);
   }, [idleTimeoutMinutes, pushConfig, sessionIdleTimeoutMinutes]);
 
   const setIdleTimeoutMinutes = useCallback((minutes: number) => {
-    const normalized = normalizeExternalMcpIdleTimeoutMinutes(minutes);
+    const normalized = writeExternalMcpIdleTimeoutMinutes(minutes);
     setIdleTimeoutRaw(normalized);
-    localStorageAdapter.writeNumber(STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES, normalized);
-    emitAIStateChanged(STORAGE_KEY_AI_EXTERNAL_MCP_IDLE_TIMEOUT_MINUTES);
     pushConfig(mode, normalized, sessionIdleTimeoutMinutes);
   }, [mode, pushConfig, sessionIdleTimeoutMinutes]);
 
   const setSessionIdleTimeoutMinutes = useCallback((minutes: number) => {
-    const normalized = normalizeSessionIdleTimeoutMinutes(minutes);
+    const normalized = writeSessionIdleTimeoutMinutes(minutes);
     setSessionIdleTimeoutRaw(normalized);
-    localStorageAdapter.writeNumber(STORAGE_KEY_AI_SESSION_IDLE_TIMEOUT_MINUTES, normalized);
-    emitAIStateChanged(STORAGE_KEY_AI_SESSION_IDLE_TIMEOUT_MINUTES);
     pushConfig(mode, idleTimeoutMinutes, normalized);
   }, [idleTimeoutMinutes, mode, pushConfig]);
 

components/sftp/SftpPaneFileList.tsx

@@ -14,7 +14,7 @@ import type { SftpFileEntry } from "../../types";
 import type { SftpPane } from "../../application/state/sftp/types";
 import type { SftpTransferSource } from "./SftpContext";
 import { sftpListOrderStore } from "./hooks/useSftpListOrderStore";
-import type { UseSftpPaneSortingResult } from "./hooks/useSftpPaneSorting";
+import type { UseSftpPaneSortingResult } from "../../application/state/sftp/useSftpPaneSorting";
 import { buildSftpColumnTemplate, isNavigableDirectory, isSftpColumnMenuKey } from "./utils";
 import { isKnownBinaryFile } from "../../lib/sftpFileUtils";
 import { SftpFileRow } from "./SftpFileRow";

components/sftp/SftpPaneTreeView.tsx

@@ -12,7 +12,7 @@ import { getParentPath, isWindowsRoot, joinPath, resolveSftpWindowsPathOptions }
 import { buildSftpColumnTemplate, filterHiddenFiles, isNavigableDirectory, isSftpColumnMenuKey, sortSftpEntries } from './utils';
 import type { SftpTransferSource } from './SftpContext';
 import type { SftpPaneTreeViewProps } from './SftpPaneTreeView.types';
-import { sftpTreeSelectionStore, useSftpTreeSelectionState } from './hooks/useSftpTreeSelectionStore';
+import { sftpTreeSelectionStore, useSftpTreeSelectionState } from '../../application/state/sftp/sftpTreeSelectionStore';
 import { sftpKeyboardSelectionStore, sftpTreeEnterStore } from './hooks/useSftpKeyboardShortcuts';
 import { useI18n } from '../../application/i18n/I18nProvider';
 import { SftpColumnMenuItems } from './SftpColumnMenuItems';

components/sftp/SftpPaneTreeView.types.ts

@@ -1,7 +1,7 @@
 import type { SftpFileEntry } from '../../types';
 import type { SftpPane } from '../../application/state/sftp/types';
 import type { SftpTransferSource } from './SftpContext';
-import type { UseSftpPaneSortingResult } from './hooks/useSftpPaneSorting';
+import type { UseSftpPaneSortingResult } from '../../application/state/sftp/useSftpPaneSorting';
 
 export interface SftpPaneTreeViewProps {
   pane: SftpPane;

components/sftp/SftpPaneView.tsx

@@ -25,16 +25,16 @@ import { useSftpPaneDialogs } from "./hooks/useSftpPaneDialogs";
 import { useSftpPaneDragAndSelect } from "./hooks/useSftpPaneDragAndSelect";
 import { useSftpPaneFiles } from "./hooks/useSftpPaneFiles";
 import { useSftpPanePath } from "./hooks/useSftpPanePath";
-import { useSftpPaneSorting, type UseSftpPaneSortingResult } from "./hooks/useSftpPaneSorting";
+import { useSftpPaneSorting, type UseSftpPaneSortingResult } from "../../application/state/sftp/useSftpPaneSorting";
 import { useSftpPaneVirtualList } from "./hooks/useSftpPaneVirtualList";
 import { sftpPaneViewModeStore } from "../../application/state/sftp/sftpPaneViewModeStore";
-import { useSftpDialogActionHandler } from "./hooks/useSftpDialogAction";
+import { useSftpDialogActionHandler } from "../../application/state/sftp/sftpDialogActionStore";
 import { useSftpBookmarks } from "./hooks/useSftpBookmarks";
-import { useLocalSftpBookmarks } from "./hooks/useLocalSftpBookmarks";
+import { useLocalSftpBookmarks } from "../../application/state/sftp/localSftpBookmarks";
 import { useGlobalSftpBookmarks } from "./hooks/useGlobalSftpBookmarks";
-import { useSftpHostViewMode } from "./hooks/useSftpHostViewMode";
+import { useSftpHostViewMode } from "../../application/state/sftp/sftpHostViewModeStore";
 import { sftpListOrderStore } from "./hooks/useSftpListOrderStore";
-import { sftpTreeSelectionStore } from "./hooks/useSftpTreeSelectionStore";
+import { sftpTreeSelectionStore } from "../../application/state/sftp/sftpTreeSelectionStore";
 import { sftpClipboardUploadStore } from "./clipboardUpload";
 
 interface TreeReloadRequest {

components/sftp/hooks/selectionScope.ts

@@ -1,5 +1,5 @@
 import type { SftpStateApi } from "../../../application/state/useSftpState";
-import { sftpTreeSelectionStore } from "./useSftpTreeSelectionStore";
+import { sftpTreeSelectionStore } from "../../../application/state/sftp/sftpTreeSelectionStore";
 
 export interface SftpSelectionTarget {
   side: "left" | "right";

components/sftp/hooks/useLocalSftpBookmarks.ts

@@ -1,65 +0,0 @@
-import { useCallback, useMemo, useSyncExternalStore } from "react";
-import type { SftpBookmark } from "../../../domain/models";
-import { localStorageAdapter } from "../../../infrastructure/persistence/localStorageAdapter";
-import { STORAGE_KEY_SFTP_LOCAL_BOOKMARKS } from "../../../infrastructure/config/storageKeys";
-import { createSftpBookmark } from "../../../application/state/sftp/bookmarkHelpers";
-
-// ── Shared external store so every hook instance sees the same bookmarks ──
-
-type Listener = () => void;
-const listeners = new Set<Listener>();
-
-let snapshot: SftpBookmark[] =
-    localStorageAdapter.read<SftpBookmark[]>(STORAGE_KEY_SFTP_LOCAL_BOOKMARKS) ?? [];
-
-function subscribe(listener: Listener) {
-    listeners.add(listener);
-    return () => { listeners.delete(listener); };
-}
-
-function getSnapshot() {
-    return snapshot;
-}
-
-function setBookmarks(next: SftpBookmark[] | ((prev: SftpBookmark[]) => SftpBookmark[])) {
-    snapshot = typeof next === "function" ? next(snapshot) : next;
-    localStorageAdapter.write(STORAGE_KEY_SFTP_LOCAL_BOOKMARKS, snapshot);
-    for (const l of listeners) l();
-}
-
-// ── Hook ──
-
-interface UseLocalSftpBookmarksParams {
-    currentPath: string | undefined;
-}
-
-export const useLocalSftpBookmarks = ({
-    currentPath,
-}: UseLocalSftpBookmarksParams) => {
-    const bookmarks = useSyncExternalStore(subscribe, getSnapshot, getSnapshot);
-
-    const isCurrentPathBookmarked = useMemo(
-        () => !!currentPath && bookmarks.some((b) => b.path === currentPath),
-        [currentPath, bookmarks],
-    );
-
-    const toggleBookmark = useCallback(() => {
-        if (!currentPath) return;
-        if (isCurrentPathBookmarked) {
-            setBookmarks((prev) => prev.filter((b) => b.path !== currentPath));
-        } else {
-            setBookmarks((prev) => [...prev, createSftpBookmark(currentPath)]);
-        }
-    }, [currentPath, isCurrentPathBookmarked]);
-
-    const deleteBookmark = useCallback((id: string) => {
-        setBookmarks((prev) => prev.filter((b) => b.id !== id));
-    }, []);
-
-    return {
-        bookmarks,
-        isCurrentPathBookmarked,
-        toggleBookmark,
-        deleteBookmark,
-    };
-};

components/sftp/hooks/useSftpKeyboardShortcuts.ts

@@ -10,10 +10,10 @@ import type { MutableRefObject } from "react";
 import { KeyBinding, matchesKeyBinding } from "../../../domain/models";
 import { getParentPath, joinPath, resolveSftpWindowsPathOptions } from "../../../application/state/sftp/utils";
 import { netcattyBridge } from "../../../infrastructure/services/netcattyBridge";
-import { sftpClipboardStore, SftpClipboardFile } from "./useSftpClipboard";
-import { sftpFocusStore } from "./useSftpFocusedPane";
-import { sftpDialogActionStore } from "./useSftpDialogAction";
-import { sftpTreeSelectionStore } from "./useSftpTreeSelectionStore";
+import { sftpClipboardStore, SftpClipboardFile } from "../../../application/state/sftp/sftpClipboardStore";
+import { sftpFocusStore } from "../../../application/state/sftp/sftpFocusStore";
+import { sftpDialogActionStore } from "../../../application/state/sftp/sftpDialogActionStore";
+import { sftpTreeSelectionStore } from "../../../application/state/sftp/sftpTreeSelectionStore";
 import { sftpListOrderStore } from "./useSftpListOrderStore";
 import { sftpPaneViewModeStore } from "../../../application/state/sftp/sftpPaneViewModeStore";
 import { keepOnlyPaneSelections } from "./selectionScope";

components/sftp/utils.ts

@@ -23,7 +23,18 @@ import {
 } from 'lucide-react';
 import React from 'react';
 import type { LucideIcon } from 'lucide-react';
+import { formatBytes as formatBytesDomain } from '../../domain/formatBytes';
 import { SftpFileEntry } from '../../types';
+import {
+  formatDate as formatDateFromState,
+  isNavigableDirectory,
+} from '../../application/state/sftp/utils';
+
+export { isNavigableDirectory };
+
+/** Accept undefined timestamps from file-list rows. */
+export const formatDate = (timestamp: number | undefined): string =>
+  formatDateFromState(timestamp ?? 0);
 
 // Pre-built icon maps for O(1) lookup in getFileIcon
 type IconDef = [LucideIcon, string?];
@@ -177,37 +188,29 @@ const EXTENSION_ICON_MAP = new Map<string, IconDef>([
 ]);
 
 /**
- * Format bytes with appropriate unit (B, KB, MB, GB)
+ * Format bytes with appropriate unit (B, KB, MB, GB, TB)
  */
 export const formatBytes = (bytes: number | string): string => {
     const numBytes = typeof bytes === 'string' ? parseInt(bytes, 10) : bytes;
-    if (isNaN(numBytes) || numBytes === 0) return '0 B';
-    const units = ['B', 'KB', 'MB', 'GB', 'TB'];
-    const i = Math.floor(Math.log(numBytes) / Math.log(1024));
-    const size = numBytes / Math.pow(1024, i);
-    return `${size.toFixed(i === 0 ? 0 : 1)} ${units[i]}`;
+    if (typeof numBytes !== 'number' || isNaN(numBytes)) return '0 B';
+    return formatBytesDomain(numBytes, {
+        zeroDisplay: '0 B',
+        includeTB: true,
+        fractionDigits: 1,
+        byteUnit: 'B',
+    });
 };
 
 /**
  * Format bytes for transfer display
  */
 export const formatTransferBytes = (bytes: number): string => {
-    if (bytes === 0) return '0 B';
-    const units = ['B', 'KB', 'MB', 'GB'];
-    const i = Math.floor(Math.log(bytes) / Math.log(1024));
-    const size = bytes / Math.pow(1024, i);
-    return `${size.toFixed(i === 0 ? 0 : 1)} ${units[i]}`;
-};
-
-/**
- * Format date as YYYY-MM-DD hh:mm in local timezone
- */
-export const formatDate = (timestamp: number | undefined): string => {
-    if (!timestamp) return '--';
-    const date = new Date(timestamp);
-    if (isNaN(date.getTime())) return '--';
-    const pad = (n: number) => n.toString().padStart(2, '0');
-    return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())} ${pad(date.getHours())}:${pad(date.getMinutes())}`;
+    return formatBytesDomain(bytes, {
+        zeroDisplay: '0 B',
+        includeTB: false,
+        fractionDigits: 1,
+        byteUnit: 'B',
+    });
 };
 
 /**
@@ -245,40 +248,15 @@ export const getFileIcon = (entry: SftpFileEntry): React.ReactElement => {
     return React.createElement(FileCode, { size: 14 });
 };
 
-// Sort configuration types
-export type SortField = 'name' | 'size' | 'modified' | 'type';
-export type SortOrder = 'asc' | 'desc';
-
-// Column widths type
-export interface ColumnWidths {
-    name: number;
-    modified: number;
-    size: number;
-    type: number;
-}
-
-export type SftpColumnVisibility = Record<keyof ColumnWidths, boolean>;
-
-export const DEFAULT_SFTP_COLUMN_VISIBILITY: SftpColumnVisibility = {
-    name: true,
-    modified: true,
-    size: true,
-    type: true,
-};
-
-export const normalizeSftpColumnVisibility = (value: unknown): SftpColumnVisibility => {
-    if (!value || typeof value !== 'object' || Array.isArray(value)) {
-        return DEFAULT_SFTP_COLUMN_VISIBILITY;
-    }
-
-    const stored = value as Partial<Record<keyof ColumnWidths, unknown>>;
-    return {
-        name: true,
-        modified: stored.modified !== false,
-        size: stored.size !== false,
-        type: stored.type !== false,
-    };
-};
+// Sort / column layout — owned by application/state; re-exported for UI callers.
+export {
+  DEFAULT_SFTP_COLUMN_VISIBILITY,
+  normalizeSftpColumnVisibility,
+  type ColumnWidths,
+  type SftpColumnVisibility,
+  type SortField,
+  type SortOrder,
+} from '../../application/state/sftp/columnLayout';
 
 export const isSftpColumnMenuKey = (key: string, shiftKey: boolean): boolean =>
     key === 'ContextMenu' || (key === 'F10' && shiftKey);
@@ -339,14 +317,6 @@ export const sortSftpEntries = (
     return sorted;
 };
 
-/**
- * Check if an entry is navigable like a directory
- * This includes regular directories and symlinks that point to directories
- */
-export const isNavigableDirectory = (entry: SftpFileEntry): boolean => {
-    return entry.type === 'directory' || (entry.type === 'symlink' && entry.linkTarget === 'directory');
-};
-
 /**
  * Check if a file is hidden
  * - Windows: checks the `hidden` attribute (set by localFsBridge)

components/snippetsGridLayout.ts

@@ -0,0 +1,26 @@
+const SNIPPETS_GRID_GAP = 12;
+const SNIPPETS_GRID_MIN_CARD_WIDTH = 220;
+/** Container-width thresholds (mirrors former md / xl column steps). */
+const SNIPPETS_GRID_MD_MIN_WIDTH = 768;
+const SNIPPETS_GRID_XL_MIN_WIDTH = 1280;
+const SNIPPETS_GRID_MAX_COLUMNS = 3;
+
+/** Column policy for snippets — shared by virtualized and CSS-var grids. */
+export function getSnippetsGridColumnCount(
+  width: number,
+  options: { hasSidePanel: boolean },
+): number {
+  if (!Number.isFinite(width) || width <= 0) return 1;
+  if (options.hasSidePanel) {
+    return Math.max(
+      1,
+      Math.floor(
+        (width + SNIPPETS_GRID_GAP)
+        / (SNIPPETS_GRID_MIN_CARD_WIDTH + SNIPPETS_GRID_GAP),
+      ),
+    );
+  }
+  if (width >= SNIPPETS_GRID_XL_MIN_WIDTH) return SNIPPETS_GRID_MAX_COLUMNS;
+  if (width >= SNIPPETS_GRID_MD_MIN_WIDTH) return 2;
+  return 1;
+}

components/systemManager/DockerContainersPanel.tsx

@@ -27,8 +27,8 @@ import {
   SystemPanelToolbar,
 } from './SystemPanelUi';
 import { SystemPanelConfirmDialog } from './SystemPanelConfirmDialog';
-import { useAsyncRecordCache } from './hooks/useAsyncRecordCache';
-import { usePolling, useStableTranslate } from './hooks/useSystemManager';
+import { useAsyncRecordCache } from '../../application/state/systemManager/useAsyncRecordCache';
+import { usePolling, useStableTranslate } from '../../application/state/useSystemManager';
 import { openInteractiveTerminal } from './openInteractiveTerminal';
 import { showSystemManagerError } from './systemManagerToast';
 

components/systemManager/DockerImagesPanel.tsx

@@ -23,8 +23,8 @@ import {
 } from './SystemPanelUi';
 import { SystemPanelConfirmDialog } from './SystemPanelConfirmDialog';
 import { SystemPanelPromptDialog } from './SystemPanelPromptDialog';
-import { useAsyncRecordCache } from './hooks/useAsyncRecordCache';
-import { usePolling, useStableTranslate } from './hooks/useSystemManager';
+import { useAsyncRecordCache } from '../../application/state/systemManager/useAsyncRecordCache';
+import { usePolling, useStableTranslate } from '../../application/state/useSystemManager';
 import { showSystemManagerError } from './systemManagerToast';
 
 type Backend = ReturnType<typeof useSystemManagerBackend>;

components/systemManager/GpuManagerTab.tsx

@@ -20,7 +20,7 @@ import {
   SystemPanelStatusBadge,
   SystemPanelToolbar,
 } from './SystemPanelUi';
-import { usePolling, useStableTranslate } from './hooks/useSystemManager';
+import { usePolling, useStableTranslate } from '../../application/state/useSystemManager';
 
 type Backend = ReturnType<typeof useSystemManagerBackend>;
 

components/systemManager/ProcessManagerTab.tsx

@@ -33,7 +33,7 @@ import {
 } from './SystemPanelUi';
 import { SystemPanelConfirmDialog } from './SystemPanelConfirmDialog';
 import { SystemPanelPromptDialog } from './SystemPanelPromptDialog';
-import { usePolling, useStableTranslate } from './hooks/useSystemManager';
+import { usePolling, useStableTranslate } from '../../application/state/useSystemManager';
 import {
   getCachedProcessList,
   setCachedProcessList,

components/systemManager/SystemManagerSidePanel.tsx

@@ -18,7 +18,7 @@ import { TmuxManagerTab } from './TmuxManagerTab';
 import { WorkspaceSidebarHostHeader } from '../terminalLayer/WorkspaceSidebarHostHeader';
 import { TERMINAL_SIDE_PANEL_INNER_HEADER_CLASS } from '../terminalLayer/terminalSidePanelChrome';
 import { SystemPanelEmpty, SystemPanelShell } from './SystemPanelUi';
-import { useSessionCapabilities } from './hooks/useSystemManager';
+import { useSessionCapabilities } from '../../application/state/useSystemManager';
 
 const SystemPanelChecking = memo(function SystemPanelChecking({
   message,

components/systemManager/SystemOverviewTab.tsx

@@ -10,7 +10,7 @@ import React, { memo, useEffect, useMemo, useState } from 'react';
 import { useI18n } from '../../application/i18n/I18nProvider';
 import { aggregateMountedDiskUsage } from '../../domain/systemDiskUsage';
 import { cn } from '../../lib/utils';
-import { useServerStats } from '../terminal/hooks/useServerStats';
+import { useServerStats } from '../../application/state/useServerStats';
 import { ResourceBar } from './ResourceBar';
 import {
   SystemPanelEmpty,