Add web GUI: FastAPI API + Vue 3 frontend with dark theme

API (web/api.py):
  GET  /api/projects, /api/projects/{id}, /api/tasks/{id}
  GET  /api/decisions?project=X, /api/cost?days=7, /api/support/tickets
  POST /api/projects, /api/tasks, /api/decisions, /api/bootstrap
  CORS for localhost:5173, all queries via models.py

Frontend (web/frontend/):
  Vue 3 + TypeScript + Vite + Tailwind CSS v3
  Dashboard: project cards with task counters, cost, status badges
  ProjectView: tabs for Tasks/Decisions/Modules with filters
  Modals: Add Project, Add Task, Add Decision, Bootstrap
  Dark theme, monospace font, minimal clean design

Startup:
  API:  cd web && uvicorn api:app --reload --port 8420
  Web:  cd web/frontend && npm install && npm run dev

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/frontend/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc -b && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.5.30",
+    "vue-router": "^4.6.4"
+  },
+  "devDependencies": {
+    "@types/node": "^24.12.0",
+    "@vitejs/plugin-vue": "^6.0.5",
+    "@vue/tsconfig": "^0.9.0",
+    "autoprefixer": "^10.4.27",
+    "postcss": "^8.5.8",
+    "tailwindcss": "^3.4.19",
+    "typescript": "~5.9.3",
+    "vite": "^8.0.0",
+    "vue-tsc": "^3.2.5"
+  }
+}