Phase 1: Foundation — backend auth, frontend shell, Docker setup

Backend (FastAPI):
- App factory with async SQLAlchemy 2.0 + PostgreSQL
- Alembic migration for users and sessions tables
- JWT auth (access + refresh tokens, bcrypt passwords)
- Auth endpoints: register, login, refresh, logout, me
- Admin seed script, role-based access deps

Frontend (React + TypeScript):
- Vite + Tailwind CSS + shadcn/ui theme (health-oriented palette)
- i18n with English and Russian translations
- Zustand auth/UI stores with localStorage persistence
- Axios client with automatic token refresh on 401
- Login/register pages, protected routing
- App layout: collapsible sidebar, header with theme/language toggles
- Dashboard with placeholder stats

Infrastructure:
- Docker Compose (postgres, backend, frontend, nginx)
- Nginx reverse proxy with WebSocket support
- Dev override with hot reload

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

frontend/src/index.css

@@ -0,0 +1,59 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer base {
+  :root {
+    --background: 210 40% 98%;
+    --foreground: 222 47% 11%;
+    --card: 0 0% 100%;
+    --card-foreground: 222 47% 11%;
+    --popover: 0 0% 100%;
+    --popover-foreground: 222 47% 11%;
+    --primary: 198 70% 40%;
+    --primary-foreground: 210 40% 98%;
+    --secondary: 210 40% 96%;
+    --secondary-foreground: 222 47% 11%;
+    --muted: 210 40% 96%;
+    --muted-foreground: 215 16% 47%;
+    --accent: 210 40% 96%;
+    --accent-foreground: 222 47% 11%;
+    --destructive: 0 84% 60%;
+    --destructive-foreground: 210 40% 98%;
+    --border: 214 32% 91%;
+    --input: 214 32% 91%;
+    --ring: 198 70% 40%;
+    --radius: 0.75rem;
+  }
+
+  .dark {
+    --background: 222 47% 11%;
+    --foreground: 210 40% 98%;
+    --card: 222 47% 13%;
+    --card-foreground: 210 40% 98%;
+    --popover: 222 47% 13%;
+    --popover-foreground: 210 40% 98%;
+    --primary: 198 70% 50%;
+    --primary-foreground: 222 47% 11%;
+    --secondary: 217 33% 17%;
+    --secondary-foreground: 210 40% 98%;
+    --muted: 217 33% 17%;
+    --muted-foreground: 215 20% 65%;
+    --accent: 217 33% 17%;
+    --accent-foreground: 210 40% 98%;
+    --destructive: 0 63% 31%;
+    --destructive-foreground: 210 40% 98%;
+    --border: 217 33% 17%;
+    --input: 217 33% 17%;
+    --ring: 198 70% 50%;
+  }
+}
+
+@layer base {
+  * {
+    @apply border-border;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}