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/chat/StatusRow.tsx

@@ -24,6 +24,8 @@ import { isVSCodeRuntime } from "@/lib/desktop";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { useI18n } from "@/lib/i18n";
 
+const STATUS_ROW_CONTAINER_STYLE = { containerType: "inline-size" as const, containerName: "status-row" };
+
 const statusConfig: Record<TodoStatus, { textClassName: string }> = {
   in_progress: {
     textClassName: "text-foreground",
@@ -292,7 +294,7 @@ export const StatusRow: React.FC<StatusRowProps> = ({
   }
 
   return (
-    <div className={cn("mb-1", !hasLeftAccessory && "chat-column")} style={{ containerType: "inline-size", containerName: "status-row" }}>
+    <div className={cn("mb-1", !hasLeftAccessory && "chat-column")} style={STATUS_ROW_CONTAINER_STYLE}>
       <div className={cn("flex items-center justify-between py-0.5 gap-2 h-[1.2rem]", hasLeftAccessory && "px-0.5")}>
         {/* Left: Abort status or Working placeholder or leftAccessory */}
         <div className={cn("flex-1 flex items-center min-w-0", hasLeftAccessory ? "pl-1.5" : "overflow-hidden")}>