Refactor to manager-centric model, add team calendar for all users

Key changes:
- Removed office-centric model (deleted offices.py, office-rules)
- Renamed to team-rules, managers are part of their own team
- Team calendar visible to all (read-only for employees)
- Admins can have a manager assigned

app/routes/parking.py

@@ -15,7 +15,7 @@ from sqlalchemy.orm import Session
 import uuid
 
 from database.connection import get_db
-from database.models import DailyParkingAssignment, User, OfficeMembership
+from database.models import DailyParkingAssignment, User
 from utils.auth_middleware import get_current_user, require_manager_or_admin
 from services.parking import initialize_parking_pool, get_spot_display_name
 from services.notifications import queue_parking_change_notification
@@ -49,7 +49,6 @@ class AssignmentResponse(BaseModel):
     manager_id: str
     user_name: str | None = None
     user_email: str | None = None
-    user_office_id: str | None = None
 
 
 # Routes
@@ -102,7 +101,6 @@ def get_assignments(date: str, manager_id: str = None, db: Session = Depends(get
             if user:
                 result.user_name = user.name
                 result.user_email = user.email
-                result.user_office_id = user.office_id
 
         results.append(result)
 
@@ -307,7 +305,7 @@ def reassign_spot(data: ReassignSpotRequest, db: Session = Depends(get_db), curr
 @router.get("/eligible-users/{assignment_id}")
 def get_eligible_users(assignment_id: str, db: Session = Depends(get_db), current_user=Depends(get_current_user)):
     """Get users eligible for reassignment of a parking spot.
-    Returns users in the same manager's offices.
+    Returns users managed by the same manager.
     """
     assignment = db.query(DailyParkingAssignment).filter(
         DailyParkingAssignment.id == assignment_id
@@ -324,16 +322,9 @@ def get_eligible_users(assignment_id: str, db: Session = Depends(get_db), curren
     if not (is_admin or is_manager or is_spot_owner):
         raise HTTPException(status_code=403, detail="Not authorized")
 
-    # Get all users belonging to offices managed by this manager
-    # Get offices managed by this manager
-    managed_office_ids = db.query(OfficeMembership.office_id).filter(
-        OfficeMembership.user_id == assignment.manager_id
-    ).all()
-    managed_office_ids = [o[0] for o in managed_office_ids]
-
-    # Get users in those offices
+    # Get users in this manager's team (including the manager themselves)
     users = db.query(User).filter(
-        User.office_id.in_(managed_office_ids),
+        (User.manager_id == assignment.manager_id) | (User.id == assignment.manager_id),
         User.id != assignment.user_id  # Exclude current holder
     ).all()
 
@@ -351,8 +342,7 @@ def get_eligible_users(assignment_id: str, db: Session = Depends(get_db), curren
             result.append({
                 "id": user.id,
                 "name": user.name,
-                "email": user.email,
-                "office_id": user.office_id
+                "email": user.email
             })
 
     return result