feat: add first_name/last_name to users, avatar in header, neutral dashboard bg

app/main.py

@@ -1337,6 +1337,8 @@ def create_user(payload: dict, request: Request, _: User = Depends(require_admin
         expires_at=expires_at,
         active=payload.get("active", True),
         is_admin=payload.get("is_admin", False),
+        first_name=payload.get("first_name", ""),
+        last_name=payload.get("last_name", ""),
     )
     db.add(user)
     db.commit()
@@ -1349,7 +1351,7 @@ def edit_user(user_id: int, payload: dict, request: Request, _: User = Depends(r
     user = db.get(User, user_id)
     if not user:
         raise HTTPException(status_code=404, detail="User not found")
-    for key in ["username", "active", "is_admin"]:
+    for key in ["username", "active", "is_admin", "first_name", "last_name"]:
         if key in payload:
             setattr(user, key, payload[key])
     if "password" in payload and payload["password"]: