feat(tui): git view, project-scoped task stats, polished layout/theme

- Add a Git interactive view (hotkey [t]/[4]): branch + ahead/behind,
  recent commits with detail strip, staged/unstaged/untracked files
  panel, branches list, worktrees panel, and a [P] push modal with
  pre-flight commit list and capture of stdout/stderr. ←→ cycles
  status → branches → worktrees → commits → changes; ↑↓ navigates
  rows in the focused list. 5s poll while mounted.
- Project-scoped task stats: BoardView pushes its selected project
  path into the controller; refreshTUIStats now reads from a per-
  project TaskStore via a shared getProjectStore helper. Project
  switch triggers an immediate refresh via onBoardScopeChange.
- Unified MainHeader used by status and interactive modes — section
  tabs ([1]–[5]) and interactive view tabs ([b]/[a]/[g]/[t]) always
  visible; previously the interactive header replaced the main one.
- Logs panel keeps its size when expanding a single entry.
- 'f' cycles severity filter from any panel in status mode.
- BoardView: explicit cross-view shortcuts so g/a/t always switch
  views regardless of input-handler ordering.
- BoardView column overlap fix: flexShrink={0} on structural rows.
- TaskCard always shows the title with wrap="wrap"; single short-id
  pill, no duplicate id-as-title fallback.
- Stats panel reorg: StatRow helper, bold section headers, narrow-
  width wrap for Heap and Memory trailing fragments.
- Lighter blue palette: cyanBright fg accents / cyan active bg /
  logo gradient whiteBright → white → cyanBright → cyan → blue.
- System stats sampler: RSS, heap (V8 limit-aware color), external,
  CPU%, load avg, system used/free. Heap thresholds scale off
  --max-old-space-size automatically.
- Test fixture updated for the new InteractiveData.git block.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/dashboard-tui/__tests__/app.test.tsx

@@ -63,6 +63,34 @@ function makeInteractiveData(opts: {
     getSettings: async () => settings,
     updateSettings: async (_partial: Partial<SettingsValues>) => {},
     listModels: () => models,
+    git: {
+      getStatus: async () => ({
+        branch: "main",
+        detached: false,
+        ahead: 0,
+        behind: 0,
+        staged: [],
+        unstaged: [],
+        untracked: [],
+        remoteUrl: "",
+        lastFetchAt: null,
+      }),
+      listCommits: async () => [],
+      showCommit: async () => ({
+        sha: "",
+        shortSha: "",
+        subject: "",
+        authorName: "",
+        relativeTime: "",
+        isoTime: "",
+        body: "",
+        stat: "",
+      }),
+      listBranches: async () => [],
+      listWorktrees: async () => [],
+      push: async () => ({ success: true, output: "" }),
+      fetch: async () => ({ success: true, output: "" }),
+    },
   };
 }