Initial commit: clean project structure

- Backend: FastAPI + SQLAlchemy + Celery (Python 3.11+)
- Frontend: Vue 3 + TypeScript + Pinia + Tailwind
- Admin Frontend: separate Vue 3 app for management
- Docker Compose: 9 services orchestration
- Specs: design prototypes, memory system PRD, product roadmap

Cleanup performed:
- Removed temporary debug scripts from backend root
- Removed deprecated admin_app.py (embedded UI)
- Removed duplicate docs from admin-frontend
- Updated .gitignore for Vite cache and egg-info

admin-frontend/vite.config.ts

@@ -0,0 +1,29 @@
+import { fileURLToPath, URL } from 'node:url'
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+
+export default defineConfig({
+  plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
+  server: {
+    port: 5174,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:52000',
+        changeOrigin: true,
+      },
+      '/auth': {
+        target: 'http://localhost:52000',
+        changeOrigin: true,
+      },
+      '/admin': {
+        target: 'http://localhost:52800',
+        changeOrigin: true,
+      },
+    },
+  },
+})