test: add test suite with 65 tests, 73% coverage

- Unit tests: password hashing, notification providers, webhook field parsing
- Integration tests: auth routes (register/login/confirm-email/logout),
  invite flow, Evotor webhooks (/user/create, /user/verify, /user/token),
  admin panel (access control, activate/suspend/delete/reset-password)
- conftest: SQLite in-memory engine, transactional sessions, factory-boy
  factories (UserFactory with UserRoleEnum variants)
- Fix bcrypt: replace passlib (broken on Python 3.14 + bcrypt 5.x) with
  direct bcrypt calls; drop passlib from requirements.txt
- Fix datetime.utcnow() deprecation across routes and tests
- Fix Jinja2 TemplateResponse signature (request as first positional arg)
- Add coverage config to pyproject.toml

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

web/routes/admin.py

@@ -1,5 +1,5 @@
 import secrets
-from datetime import datetime, timedelta
+from datetime import datetime, timezone, timedelta
 
 from fastapi import APIRouter, Depends, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
@@ -23,7 +23,7 @@ PAGE_SIZE = 25
 def _render(request: Request, template: str, ctx: dict) -> HTMLResponse:
     ctx["request"] = request
     ctx.setdefault("jivosite_widget_id", settings.JIVOSITE_WIDGET_ID)
-    return templates.TemplateResponse(template, ctx)
+    return templates.TemplateResponse(ctx.pop("request"), template, ctx)
 
 
 def _admin_user(request: Request, db: Session) -> User:
@@ -139,7 +139,7 @@ async def admin_reset_password(user_id: int, request: Request, db: Session = Dep
     if user:
         token = secrets.token_urlsafe(32)
         user.password_reset_token = token
-        user.password_reset_expires = datetime.utcnow() + timedelta(
+        user.password_reset_expires = datetime.now(timezone.utc).replace(tzinfo=None) + timedelta(
             minutes=settings.PASSWORD_RESET_EXPIRE_MINUTES
         )
         db.commit()
@@ -159,7 +159,7 @@ async def admin_send_invite(user_id: int, request: Request, db: Session = Depend
     if user:
         token = secrets.token_urlsafe(32)
         user.invite_token = token
-        user.invite_expires = datetime.utcnow() + timedelta(hours=settings.INVITE_EXPIRE_HOURS)
+        user.invite_expires = datetime.now(timezone.utc).replace(tzinfo=None) + timedelta(hours=settings.INVITE_EXPIRE_HOURS)
         db.commit()
         invite_url = f"{settings.BASE_URL}/invite?token={token}"
         html = (