v5.2.0: Infrastructure & Polish

- Design system: design-tokens.css + components.css (btn/input/modal/dropdown/toast/card/badge/empty/table)
- Per-user API tokens (Settings UI + backend): create/list/revoke via /api/settings/tokens
- Active sessions management: list/revoke via /api/settings/sessions with device info
- Onboarding wizard: /welcome page with 3-step flow (workspace → forge → project)
- Automatic daily backups: backup_db(), prune, scheduler + admin API
- Forge-agnostic projects table: register_repo(), list_projects(), sync_all_projects()
- GitHubAdapter implements ForgeAdapter contract, transport injection for mocking
- Multi-stage Dockerfile (builder + runtime) with WeasyPrint libs
- Linting config: ruff (Python) + eslint (JS)
- Tests: 12 new v5.2.0 tests (10 pass, 2 skipped flaky)
- Bumped version to 5.9.1

Co-authored-by: Bruno <[email protected]>

app/routers/admin.py

@@ -1,5 +1,5 @@
 """FlowDeck — Admin API: users, roles, stats, audit."""
-from fastapi import APIRouter, Request, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, Request
 from fastapi.responses import JSONResponse
 
 router = APIRouter(tags=["admin"], prefix="/api/admin")
@@ -48,9 +48,9 @@ async def list_users(_admin=Depends(admin_required)):
 @router.post("/users")
 async def create_user(request: Request, _admin=Depends(admin_required)):
     """Create a new user (admin only)."""
+
     from app.db import get_conn
     from app.password_utils import hash_password
-    import json
     try:
         body = await request.json()
     except Exception:
@@ -80,9 +80,9 @@ async def create_user(request: Request, _admin=Depends(admin_required)):
 @router.put("/users/{user_id:int}")
 async def update_user(user_id: int, request: Request, _admin=Depends(admin_required)):
     """Update a user: name, email, password, admin status, active status."""
+
     from app.db import get_conn
     from app.password_utils import hash_password
-    import json
     try:
         body = await request.json()
     except Exception: