Expose chat title editing in dashboard (codex)

[numnx]

🧩 Task: Expose chat title editing in dashboard

Automated task PR opened by Code UX for T02.

📋 Summary

Sprint: Sprint 151 · Menu Selects & Chat Session Title · Task: T02

Add chat session title generation/editing, constrain header selector menus while removing the All Sprints option, and add a Jira importer Hide in Work checkbox with tests and documentation.

📝 Full Task Prompt

## Objective
Let dashboard users rename a chat session from the chat UI while keeping the thread rail and active thread header synchronized with the backend title contract from T01.

## Scope
- `dashboard/src/v2/lib/connection-api.ts`
- `dashboard/src/v2/ChatPage.tsx`
- `dashboard/src/v2/components/chat/ChatThreadHeader.tsx`
- `dashboard/src/v2/components/chat/ThreadListCard.tsx`
- `dashboard/src/v2/components/chat/__tests__/ChatPage.accessibility.test.tsx`
- Any focused existing chat component test files under `dashboard/src/v2/components/chat/__tests__/`
- Consumes T01 contract: `PATCH /api/conversations/threads/:threadId` accepts `{ title: string }` and returns the updated `ChatThread`.

## Implementation Requirements
1. Update `updateConversationThread` usage/types so dashboard code can send a title patch without losing existing route/runtime-state behavior.
2. Add an accessible inline rename control to `ChatThreadHeader.tsx` using the existing visual language, with explicit save/cancel controls, Escape cancel, Enter save, pending state, and error display.
3. Update `ChatPage.tsx` state handling so a successful rename updates the active thread and cached thread list without forcing a full loading replacement.
4. Ensure `ThreadListCard.tsx` renders the updated title and handles long titles with stable truncation/wrapping that does not resize the rail unpredictably.
5. Add or update dashboard tests covering keyboard rename, empty-title rejection, successful API call, and thread rail/header synchronization.

## Constraints
- Do not implement title generation in the frontend; consume the backend title returned on thread records.
- Do not break thread deletion, route selection, compaction, cancellation, or invocation tab behavior.
- Preserve keyboard access and visible focus states for rename controls.
- Do not add new external UI libraries.

## Verification
- `pnpm run test:dashboard -- dashboard/src/v2/components/chat/__tests__/ChatPage.accessibility.test.tsx`
- Run any new focused chat component test file directly with `pnpm run test:dashboard -- <test path>`.
- `pnpm run typecheck:dashboard`
- Success means users can rename a thread by keyboard and pointer, invalid empty titles are blocked, and returned titles are reflected in both header and rail.

✅ QA Review

⏳ QA review runs after this PR is opened. Check the task card in the dashboard for the outcome once it lands.

🤖 Model & Provider

Provider	Codex CLI
Model	gpt-5.5

⏱️ Timing

Started	2026-07-07 01:25:17 UTC
Finished	2026-07-07 01:36:30 UTC
Duration	11m 13s

📊 Token Usage

Metric	Value
Input tokens	241,124
Cached input tokens	5,408,768
Output tokens	17,820
Total tokens	5,667,712
Invocations	1
Tool calls	92
Active time	10m 43s

Included usage estimate (subscription/local login): $4.44

🌿 Branch Info

Base: feature/CODUX-151-menu-selects-chat-session-title
Head: task/feature-codux-151-menu-selects-chat-session-titl-t02-codex-mr9yvs3t

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🤖 Generated by Code UX