perf: reduce re-renders, fix mobile keyboard handling, add chunk load recovery, and improve PATH management (#1028)

* fix: exclude file content from reverted prompt text

Revert and fork now restore only the user's original prompt, not server-injected file content
Uses existing isSyntheticPart helper for type-safe filtering

* fix: keep scrollbar visible when hovering over thumb

* fix: prevent ESC abort from triggering when terminal is focused

* fix: pass directory to permission/question reply calls so approvals actually resolve

* fix: default model selection not responding after Base UI migration

* fix: prevent modal content from shifting and clipping footer buttons

* fix: improve session switching performance and add sub-agent export with prompt collapse

Defer viewport anchor saving to eliminate ~800ms UI freeze when switching sessions
Add export dialog to include sub-agent tasks recursively in markdown export
Add collapse chevron button for expanded user prompts in sticky header

* fix: resolve sidebar scroll and TDZ crash in session sidebar

* perf: reduce CPU overhead and re-renders across chat, layout, and settings

* fix: position collapse button at top of message and prevent ESC abort in terminal

* fix: position collapse button at top and add padding only when expanded

* refactor: extract shared PATH utilities and mobile keyboard hook

* refactor: import shared path-utils in electron, use module-level style constants

- Electron now imports pathLooksUserConfigured/mergePathValues from
  shared path-utils.js instead of inline duplication
- ToolPart collapsedCustomStyle moved from useMemo([]) to module const

* fix: resolve remaining merge conflicts and type errors

- Remove duplicate variable declarations in SessionNodeItem
- Remove orphaned export callback body from conflict resolution
- Fix HelpDialog description -> descriptionKey (i18n rename)

* fix: resolve type-check and lint errors in session-actions.test.ts

- Added missing bun:test type declarations (beforeEach, mock, mock.module)
- Removed unused State import
- Replaced 'as any' casts with proper OpencodeClient and ChildStoreManager types
- Added eslint-disable for unused _ parameter in mock function

* fix PR 1028 export and PATH edge cases

* fix startup retry exhaustion state

* remove opencode package lock change

* fix sub-session rename cancellation

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/components/sections/git-identities/GitPage.tsx

@@ -29,6 +29,7 @@ import {
   RiShieldKeyholeLine,
 } from '@remixicon/react';
 import { useGitIdentitiesStore, type GitIdentityProfile, type DiscoveredGitCredential } from '@/stores/useGitIdentitiesStore';
+import { useShallow } from 'zustand/react/shallow';
 import { GitSettings } from '@/components/sections/openchamber/GitSettings';
 import { GitHubSettings } from '@/components/sections/openchamber/GitHubSettings';
 import { GitIdentityEditorDialog } from './GitIdentityEditorDialog';
@@ -66,7 +67,18 @@ export const GitPage: React.FC = () => {
     loadDefaultGitIdentityId,
     setDefaultGitIdentityId,
     getUnimportedCredentials,
-  } = useGitIdentitiesStore();
+  } = useGitIdentitiesStore(useShallow((s) => ({
+    profiles: s.profiles,
+    globalIdentity: s.globalIdentity,
+    defaultGitIdentityId: s.defaultGitIdentityId,
+    deleteProfile: s.deleteProfile,
+    loadProfiles: s.loadProfiles,
+    loadGlobalIdentity: s.loadGlobalIdentity,
+    loadDiscoveredCredentials: s.loadDiscoveredCredentials,
+    loadDefaultGitIdentityId: s.loadDefaultGitIdentityId,
+    setDefaultGitIdentityId: s.setDefaultGitIdentityId,
+    getUnimportedCredentials: s.getUnimportedCredentials,
+  })));
 
   const [editorOpen, setEditorOpen] = React.useState(false);
   const [editorProfileId, setEditorProfileId] = React.useState<string | null>(null);