refactors

backend/schemas/user.py

@@ -0,0 +1,24 @@
+from pydantic import BaseModel
+
+
+class UserResponse(BaseModel):
+    """Response model for authenticated user info."""
+
+    id: int
+    email: str
+    roles: list[str]
+    permissions: list[str]
+
+
+class AdminUserResponse(BaseModel):
+    """Minimal user info for admin dropdowns."""
+
+    id: int
+    email: str
+
+
+class UserSearchResult(BaseModel):
+    """Result item for user search."""
+
+    id: int
+    email: str