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/tsconfig.node.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}