feat(cli): merge @fusion/tui into fn dashboard with Ink TUI

Replace the legacy ANSI-based DashboardTUI with an Ink/React rewrite
under packages/cli/src/commands/dashboard-tui/, delete the standalone
@fusion/tui package, and make `fn` (no args) launch the dashboard.

The new TUI keeps the existing 5-panel status mode (system, logs,
utilities, stats, settings) but adds an interactive mode (b/a/g) with
three views: a kanban board with project picker and per-task detail,
an agents list+detail with state management, and a settings editor.
Bordered focus-aware panels, solid-background help overlay, static
all-blue FUSION splash that adapts to small terminals. DashboardTUI
and DashboardLogSink public API are unchanged so dashboard.ts only
needed import-path updates plus interactiveData/loadingStatus wiring.

Also adds zod to @fusion/dashboard to satisfy a peer dep introduced
by pi-coding-agent 0.70.

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

packages/cli/package.json

@@ -50,8 +50,12 @@
     "@mariozechner/pi-ai": "^0.70.0",
     "@mariozechner/pi-coding-agent": "^0.70.0",
     "express": "^5.1.0",
+    "ink": "^6.8.0",
+    "ink-spinner": "^5.0.0",
+    "ink-text-input": "^6.0.0",
     "ioredis": "^5.6.0",
-    "multer": "^2.1.1"
+    "multer": "^2.1.1",
+    "react": "^19.0.0"
   },
   "peerDependencies": {
     "@mariozechner/pi-ai": "*",
@@ -74,11 +78,13 @@
     "@fusion/dashboard": "workspace:*",
     "@fusion/engine": "workspace:*",
     "@fusion/pi-claude-cli": "workspace:*",
-    "typebox": "^1.0.0",
     "@types/node": "^22.0.0",
+    "@types/react": "^19.0.0",
     "@vitest/coverage-v8": "^3.1.0",
+    "ink-testing-library": "^4.0.0",
     "tsup": "^8.5.1",
     "tsx": "^4.19.0",
+    "typebox": "^1.0.0",
     "typescript": "^5.7.0",
     "vitest": "^3.1.0",
     "yaml": "^2.8.3"