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/workspace.py

@@ -7,11 +7,11 @@ import json
 import logging
 import sqlite3
 
-from fastapi import APIRouter, Request, HTTPException
+from fastapi import APIRouter, HTTPException, Request
 from fastapi.responses import HTMLResponse, StreamingResponse
 
-from app.db import get_conn
 from app.auth.session import SessionManager
+from app.db import get_conn
 from app.services.automations import fire_event
 
 logger = logging.getLogger(__name__)
@@ -561,7 +561,7 @@ async def sprint_burndown(request: Request, collection_id: int, sid: int):
                 completed += p["velocity_points"]
                 break
 
-    from datetime import date, timedelta
+    from datetime import date
     today = date.today()
     start = date.fromisoformat(sprint["start_date"]) if sprint["start_date"] else today
     end = date.fromisoformat(sprint["end_date"]) if sprint["end_date"] else today