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]>

tests/test_sharing.py

@@ -4,7 +4,6 @@ Covers: partage par user_id ou email, validation de la permission
 (view/comment/edit), upsert anti-doublon, mise à jour de permission (PUT),
 retrait du partage et erreurs d'authentification.
 """
-import json
 import os
 import tempfile
 
@@ -27,8 +26,8 @@ def client():
     from app.config import settings
     settings.database_url = f"sqlite:///{db_path}"
 
+    from app.db import get_conn, init_db
     from app.main import app
-    from app.db import init_db, get_conn
     init_db()
     with get_conn() as conn:
         conn.execute(
@@ -323,4 +322,4 @@ def test_tree_is_shared_includes_link_shared_pages(client):
 
 def get_conn_ctx():
     from app.db import get_conn
-    return get_conn()
+    return get_conn()