Edit branch name (vibe-kanban) (#1182)

* ## ✅ Implementation Complete!

I've successfully implemented the branch name editing feature. Here's what was added:

### **Backend Changes**

1. **Database Model** ([task_attempt.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/db/src/models/task_attempt.rs#L407-L421))
   - Added `update_branch_name()` method to update the branch field

2. **Git Service** ([git.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/services/src/services/git.rs#L1508-L1526))
   - Added `rename_local_branch()` to handle actual Git branch renaming using libgit2

3. **API Endpoint** ([task_attempts.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/server/src/routes/task_attempts.rs#L1111-L1196))
   - Added `POST /task-attempts/{id}/rename-branch` endpoint
   - **Validation:** empty names, Git name validity, duplicates, active rebase, open PRs
   - **Flow:** validate → ensure worktree → rename in git → update DB → track analytics

### **Frontend Changes**

4. **API Client** ([api.ts](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/lib/api.ts#L533-L546))
   - Added `renameBranch()` method

5. **Actions Menu** ([ActionsDropdown.tsx](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/components/ui/ActionsDropdown.tsx#L93-L102))
   - Added "Edit Branch Name" menu item

6. **Dialog Component** ([EditBranchNameDialog.tsx](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/components/dialogs/tasks/EditBranchNameDialog.tsx))
   - Text input with validation
   - Shows backend errors
   - Auto-refreshes data on success

### **Key Features**
✅ Renames actual Git branch (not just DB)
✅ Blocks when open PR exists
✅ Blocks during active rebase
✅ Validates branch name format
✅ Prevents duplicate branch names
✅ Analytics tracking
✅ All checks pass

The feature is now ready to use from the task attempt dropdown menu!

* Cleanup script changes for task attempt 98509988-cc54-4336-a94a-fb43c16a8235

* ## ✅ Cache Invalidation Fix Complete!

I've updated [EditBranchNameDialog.tsx](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/components/dialogs/tasks/EditBranchNameDialog.tsx#L59-L71) to invalidate all relevant query keys after renaming a branch.

### What Changed
The dialog now invalidates **5 query keys** instead of just 2:

1. ✅ `['taskAttempt', attemptId]` - **Main fix** for DiffsPanel
2. ✅ `['attempt', attemptId]` - Legacy compatibility
3. ✅ `['attemptBranch', attemptId]` - Branch-specific data
4. ✅ `['branchStatus', attemptId]` - Git operations panel
5. ✅ `['taskAttempts']` - Attempts list in TaskPanel

### Result
Now when you rename a branch, **all components immediately show the new name**:
- ✅ DiffsPanel (branch name in Git operations toolbar)
- ✅ TaskPanel (attempts list)
- ✅ GitOperations component
- ✅ Any other component displaying the attempt data

**No page reload needed!** All checks pass.

* Cleanup script changes for task attempt 98509988-cc54-4336-a94a-fb43c16a8235

* ## ✅ Refactored to Use Hook Pattern!

I've successfully extracted the mutation logic into a proper `useRenameBranch` hook following the codebase's established patterns.

### Changes Made

**1. Created new hook:** [useRenameBranch.ts](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/hooks/useRenameBranch.ts)
- Uses `useMutation` from TanStack Query
- Handles cache invalidation internally
- Provides callbacks for success/error handling
- Follows the same pattern as `useChangeTargetBranch`, `useMerge`, `usePush`

**2. Simplified EditBranchNameDialog:**
- Removed manual API call and cache invalidation
- Removed local `isLoading` state (uses `mutation.isPending` instead)
- Removed `queryClient` import
- Much cleaner and more focused on UI

**3. Updated hooks exports:** [index.ts](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/hooks/index.ts#L7)

### Before vs After

**Before (inline mutation):**
- 40+ lines of try/catch, API calls, and invalidation logic
- Manual loading state management
- Hard to test, hard to reuse

**After (hook-based):**
- ~10 lines in dialog
- Hook encapsulates all mutation logic
- Reusable, testable, consistent with codebase

### Benefits
✅ **Consistency** - Matches existing patterns (useChangeTargetBranch, useMerge, etc.)
✅ **Reusability** - Can be used anywhere branch renaming is needed
✅ **Testability** - Hook can be unit tested separately
✅ **Maintainability** - Single source of truth for invalidation logic
✅ **Cleaner Dialog** - Dialog focuses purely on UI concerns

All checks pass!

* Cleanup script changes for task attempt 98509988-cc54-4336-a94a-fb43c16a8235

* ## ✅ i18n Check Complete!

All internationalization issues have been resolved:

### Fixed Issues

**1. Missing translation keys** - Added to all locales (en, es, ja, ko):
- `actionsMenu.editBranchName`

**2. Hardcoded strings in EditBranchNameDialog** - Now using translation keys:
- Dialog title → `t('editBranchName.dialog.title')`
- Dialog description → `t('editBranchName.dialog.description')`
- Branch name label → `t('editBranchName.dialog.branchNameLabel')`
- Placeholder text → `t('editBranchName.dialog.placeholder')`
- "Renaming..." → `t('editBranchName.dialog.renaming')`
- "Rename Branch" → `t('editBranchName.dialog.action')`

### Translations Added

**English:** "Edit branch name"
**Spanish (es):** "Editar nombre de rama"
**Japanese (ja):** "ブランチ名を編集"
**Korean (ko):** "브랜치 이름 편집"

### Results
✅ **No new literal strings introduced**
✅ **No duplicate keys found**
✅ **Translation keys consistent across all locales**
✅ **All type checks pass**

The feature is now fully internationalized and ready for users in all supported languages!

* Cleanup script changes for task attempt 98509988-cc54-4336-a94a-fb43c16a8235

* ## ✅ Child Task Updates Complete!

I've successfully implemented the fix to update child task attempts when renaming a branch.

### What Was Added

**1. Database Helper** ([task_attempt.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/db/src/models/task_attempt.rs#L422-L445))
- Added `update_target_branch_for_children_of_attempt()` method
- Uses single scoped SQL UPDATE with subquery
- Only affects attempts for direct child tasks
- Returns count of updated attempts

**2. Rename Branch Endpoint** ([task_attempts.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/server/src/routes/task_attempts.rs#L1219-L1239))
- Stores old branch name before update
- After renaming, updates all child task attempts
- Logs count of updated children
- Tracks updated count in analytics

### How It Works

**Scenario:**
1. Parent attempt has branch `feature/old`
2. User creates 2 subtasks from parent attempt
3. Subtask attempts inherit `target_branch = "feature/old"`
4. Parent branch renamed to `feature/new`
5. ✅ Both subtask attempts automatically get `target_branch = "feature/new"`

**SQL Query:**
```sql
UPDATE task_attempts
SET target_branch = 'feature/new'
WHERE target_branch = 'feature/old'
  AND task_id IN (
    SELECT id FROM tasks
    WHERE parent_task_attempt = parent_attempt_id
  )
```

### What's Updated
✅ `target_branch` for all attempts of direct child tasks
✅ Only when it matches the old branch name
✅ Scoped by parent-child relationship (via `parent_task_attempt` FK)

### What's NOT Updated
❌ Unrelated attempts that happen to use same branch name
❌ Child attempts' own `branch` field (they have their own branches)
❌ GitHub PR bases (would need GitHub API call)

### Result
✅ Child task attempts continue to work correctly after parent branch rename
✅ Efficient single-query update
✅ Safe scoping prevents unintended changes
✅ All checks pass

* Cleanup script changes for task attempt 98509988-cc54-4336-a94a-fb43c16a8235

* ## ✅ Analytics & Types Fixed!

### Changes Made

**1. Analytics Anonymity** ([task_attempts.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/server/src/routes/task_attempts.rs#L1240-L1248))
- Removed `old_branch` and `new_branch` from analytics event
- Now only tracks: `attempt_id` and `updated_children` (anonymous)

**2. Type Export** ([generate_types.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/crates/server/src/bin/generate_types.rs#L51-L52))
- Added `RenameBranchRequest::decl()` and `RenameBranchResponse::decl()`
- Types now exported to [shared/types.ts](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/shared/types.ts)

**3. Frontend Type Usage** ([api.ts](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/9850-edit-branch-name/frontend/src/lib/api.ts#L49-L50))
- Imported `RenameBranchRequest` and `RenameBranchResponse` from shared types
- Changed signature from `Promise<{ branch: string }>` to `Promise<RenameBranchResponse>`
- Uses properly typed request payload

### Results
✅ **Anonymous analytics** - No branch names (PII) sent
✅ **Type-safe** - Frontend/backend use same shared types
✅ **Consistent** - Matches pattern of other API methods
✅ **All checks pass** - TypeScript, Rust, and i18n

* ## ✅ Analytics Now Fully Anonymous!

Removed `attempt_id` from the analytics event. Now the event only tracks:
```json
{
  "updated_children": 0
}
```

Fully anonymous - no IDs, no branch names, no PII. Just aggregate counts for usage metrics.

All checks pass!

frontend/src/i18n/locales/en/tasks.json

@@ -264,9 +264,20 @@
     "createNewAttempt": "Create new attempt",
     "createSubtask": "Create subtask",
     "gitActions": "Git actions",
+    "editBranchName": "Edit branch name",
     "task": "Task",
     "duplicate": "Duplicate"
   },
+  "editBranchName": {
+    "dialog": {
+      "title": "Edit Branch Name",
+      "description": "Enter a new name for the branch. Cannot rename if an open PR exists.",
+      "branchNameLabel": "Branch Name",
+      "placeholder": "e.g., feature/my-branch",
+      "renaming": "Renaming...",
+      "action": "Rename Branch"
+    }
+  },
   "showcases": {
     "taskPanel": {
       "companion": {

frontend/src/i18n/locales/es/tasks.json

@@ -7,12 +7,23 @@
     "createNewAttempt": "Create new attempt",
     "createSubtask": "Create subtask",
     "duplicate": "Duplicate",
+    "editBranchName": "Editar nombre de rama",
     "gitActions": "Acciones de Git",
     "openInIde": "Open attempt in IDE",
     "task": "Task",
     "viewProcesses": "View processes",
     "viewRelatedTasks": "View related tasks"
   },
+  "editBranchName": {
+    "dialog": {
+      "title": "Editar nombre de rama",
+      "description": "Ingrese un nuevo nombre para la rama. No se puede renombrar si existe un PR abierto.",
+      "branchNameLabel": "Nombre de rama",
+      "placeholder": "ej., feature/mi-rama",
+      "renaming": "Renombrando...",
+      "action": "Renombrar rama"
+    }
+  },
   "attempt": {
     "actions": {
       "openInIde": "Abrir en IDE",

frontend/src/i18n/locales/ja/tasks.json

@@ -7,12 +7,23 @@
     "createNewAttempt": "Create new attempt",
     "createSubtask": "Create subtask",
     "duplicate": "Duplicate",
+    "editBranchName": "ブランチ名を編集",
     "gitActions": "Gitアクション",
     "openInIde": "Open attempt in IDE",
     "task": "Task",
     "viewProcesses": "View processes",
     "viewRelatedTasks": "View related tasks"
   },
+  "editBranchName": {
+    "dialog": {
+      "title": "ブランチ名を編集",
+      "description": "ブランチの新しい名前を入力してください。オープンなPRが存在する場合は名前を変更できません。",
+      "branchNameLabel": "ブランチ名",
+      "placeholder": "例: feature/my-branch",
+      "renaming": "名前を変更中...",
+      "action": "ブランチ名を変更"
+    }
+  },
   "attempt": {
     "actions": {
       "openInIde": "IDEで開く",

frontend/src/i18n/locales/ko/tasks.json

@@ -7,12 +7,23 @@
     "createNewAttempt": "Create new attempt",
     "createSubtask": "Create subtask",
     "duplicate": "Duplicate",
+    "editBranchName": "브랜치 이름 편집",
     "gitActions": "Git 작업",
     "openInIde": "Open attempt in IDE",
     "task": "Task",
     "viewProcesses": "View processes",
     "viewRelatedTasks": "View related tasks"
   },
+  "editBranchName": {
+    "dialog": {
+      "title": "브랜치 이름 편집",
+      "description": "브랜치의 새 이름을 입력하세요. 열려있는 PR이 있으면 이름을 변경할 수 없습니다.",
+      "branchNameLabel": "브랜치 이름",
+      "placeholder": "예: feature/my-branch",
+      "renaming": "이름 변경 중...",
+      "action": "브랜치 이름 변경"
+    }
+  },
   "attempt": {
     "actions": {
       "openInIde": "IDE에서 열기",