Migrate web app from Python/FastAPI to Node.js/TypeScript

Replace the entire Python/FastAPI backend with a Node.js/TypeScript stack:
- Framework: Hono + @hono/node-server
- Templates: Nunjucks (.njk) replacing Jinja2 (.html)
- ORM: Drizzle ORM with mysql2 (same MariaDB schema, no migrations needed)
- Sessions: hono-sessions with CookieStore
- CSS: Pico CSS v2 replacing Bootstrap 5 (Bootstrap Icons CDN kept)
- Dev: tsx watch; Prod: tsc + node dist/index.js

Original Python app preserved in web-python/ as backup.
Updated Dockerfile.web and docker-compose.yml for Node.js deployment.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web-python/auth.py

@@ -0,0 +1,23 @@
+from fastapi import Request, Depends
+from sqlalchemy.orm import Session
+from passlib.context import CryptContext
+
+from web.database import get_db
+from web.models import User
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def hash_password(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return pwd_context.verify(plain, hashed)
+
+
+def get_current_user(request: Request, db: Session = Depends(get_db)) -> User | None:
+    user_id = request.session.get("user_id")
+    if not user_id:
+        return None
+    return db.query(User).filter(User.id == user_id).first()