feat: implement Phase 1 Foundation for AutoScheduler GTD System

- Initialize npm workspaces monorepo (backend, frontend, shared-types)
- Scaffold NestJS backend with modules: Auth, Users, Tasks, Projects, Inbox, Health
- Create React frontend with Vite, TailwindCSS, Radix UI
- Implement TypeORM entities: User, InboxItem, Task, Project
- Add JWT authentication with Passport.js and bcrypt
- Build Inbox capture API (POST /inbox, GET /inbox, POST /inbox/:id/process)
- Create Inbox UI with quick-add form and GTD processing workflow modal
- Configure Docker Compose stack (postgres, redis, backend, frontend)
- Add health check endpoint with database/Redis status
- Write unit tests for auth and inbox services

Phase 1 features complete:
- GTD Inbox Capture: Manual tasks via web form quick-add
- GTD Processing Workflow: Interactive inbox processing interface

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/frontend/postcss.config.js

@@ -0,0 +1,6 @@
+export default {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};