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/commands/CommandsPage.tsx

@@ -4,6 +4,7 @@ import { Input } from '@/components/ui/input';
 import { Textarea } from '@/components/ui/textarea';
 import { toast } from '@/components/ui';
 import { useCommandsStore, type CommandConfig, type CommandScope } from '@/stores/useCommandsStore';
+import { useShallow } from 'zustand/react/shallow';
 import { RiTerminalBoxLine, RiUser3Line, RiFolderLine } from '@remixicon/react';
 import { ModelSelector } from '../agents/ModelSelector';
 import { AgentSelector } from './AgentSelector';
@@ -19,7 +20,23 @@ import { useI18n } from '@/lib/i18n';
 
 export const CommandsPage: React.FC = () => {
   const { t } = useI18n();
-  const { selectedCommandName, getCommandByName, createCommand, updateCommand, commands, commandDraft, setCommandDraft } = useCommandsStore();
+  const {
+    selectedCommandName,
+    getCommandByName,
+    createCommand,
+    updateCommand,
+    commands,
+    commandDraft,
+    setCommandDraft,
+  } = useCommandsStore(useShallow((s) => ({
+    selectedCommandName: s.selectedCommandName,
+    getCommandByName: s.getCommandByName,
+    createCommand: s.createCommand,
+    updateCommand: s.updateCommand,
+    commands: s.commands,
+    commandDraft: s.commandDraft,
+    setCommandDraft: s.setCommandDraft,
+  })));
 
   const selectedCommand = selectedCommandName ? getCommandByName(selectedCommandName) : null;
   const isNewCommand = Boolean(commandDraft && commandDraft.name === selectedCommandName && !selectedCommand);

packages/ui/src/components/sections/commands/CommandsSidebar.tsx

@@ -20,6 +20,7 @@ import {
 import { RiAddLine, RiTerminalBoxLine, RiMore2Line, RiDeleteBinLine, RiFileCopyLine, RiRestartLine, RiEditLine } from '@remixicon/react';
 import { useCommandsStore, isCommandBuiltIn, type Command } from '@/stores/useCommandsStore';
 import { useSkillsStore } from '@/stores/useSkillsStore';
+import { useShallow } from 'zustand/react/shallow';
 import { ScrollableOverlay } from '@/components/ui/ScrollableOverlay';
 import { cn } from '@/lib/utils';
 import { SettingsProjectSelector } from '@/components/sections/shared/SettingsProjectSelector';
@@ -46,8 +47,17 @@ export const CommandsSidebar: React.FC<CommandsSidebarProps> = ({ onItemSelect }
     createCommand,
     deleteCommand,
     loadCommands,
-  } = useCommandsStore();
-  const { skills, loadSkills } = useSkillsStore();
+  } = useCommandsStore(useShallow((s) => ({
+    selectedCommandName: s.selectedCommandName,
+    commands: s.commands,
+    setSelectedCommand: s.setSelectedCommand,
+    setCommandDraft: s.setCommandDraft,
+    createCommand: s.createCommand,
+    deleteCommand: s.deleteCommand,
+    loadCommands: s.loadCommands,
+  })));
+  const skills = useSkillsStore((s) => s.skills);
+  const loadSkills = useSkillsStore((s) => s.loadSkills);
 
   React.useEffect(() => {
     loadCommands();