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/managers.py

@@ -2,8 +2,8 @@
 Manager Rules Routes
 Manager settings, closing days, guarantees, and exclusions
 
-Key concept: Managers own parking spots and set rules for all their managed offices.
-Rules are set at manager level, not office level.
+Key concept: Managers own parking spots and set rules for their managed users.
+Rules are set at manager level (users have manager_id pointing to their manager).
 """
 from datetime import datetime
 from fastapi import APIRouter, Depends, HTTPException
@@ -13,7 +13,7 @@ import uuid
 
 from database.connection import get_db
 from database.models import (
-    Office, User, OfficeMembership,
+    User,
     ManagerClosingDay, ManagerWeeklyClosingDay,
     ParkingGuarantee, ParkingExclusion
 )
@@ -52,14 +52,12 @@ class ManagerSettingsUpdate(BaseModel):
 # Manager listing and details
 @router.get("")
 def list_managers(db: Session = Depends(get_db), user=Depends(require_manager_or_admin)):
-    """Get all managers with their managed offices and parking quota"""
+    """Get all managers with their managed user count and parking quota"""
     managers = db.query(User).filter(User.role == "manager").all()
     result = []
 
     for manager in managers:
-        memberships = db.query(OfficeMembership).filter(OfficeMembership.user_id == manager.id).all()
-        office_ids = [m.office_id for m in memberships]
-        offices = db.query(Office).filter(Office.id.in_(office_ids)).all() if office_ids else []
+        managed_user_count = db.query(User).filter(User.manager_id == manager.id).count()
 
         result.append({
             "id": manager.id,
@@ -67,7 +65,7 @@ def list_managers(db: Session = Depends(get_db), user=Depends(require_manager_or
             "email": manager.email,
             "parking_quota": manager.manager_parking_quota or 0,
             "spot_prefix": manager.manager_spot_prefix,
-            "offices": [{"id": o.id, "name": o.name} for o in offices]
+            "managed_user_count": managed_user_count
         })
 
     return result
@@ -75,14 +73,12 @@ def list_managers(db: Session = Depends(get_db), user=Depends(require_manager_or
 
 @router.get("/{manager_id}")
 def get_manager_details(manager_id: str, db: Session = Depends(get_db), user=Depends(require_manager_or_admin)):
-    """Get manager details including offices and parking settings"""
+    """Get manager details including managed users and parking settings"""
     manager = db.query(User).filter(User.id == manager_id, User.role == "manager").first()
     if not manager:
         raise HTTPException(status_code=404, detail="Manager not found")
 
-    memberships = db.query(OfficeMembership).filter(OfficeMembership.user_id == manager_id).all()
-    office_ids = [m.office_id for m in memberships]
-    offices = db.query(Office).filter(Office.id.in_(office_ids)).all() if office_ids else []
+    managed_user_count = db.query(User).filter(User.manager_id == manager_id).count()
 
     return {
         "id": manager.id,
@@ -90,7 +86,7 @@ def get_manager_details(manager_id: str, db: Session = Depends(get_db), user=Dep
         "email": manager.email,
         "parking_quota": manager.manager_parking_quota or 0,
         "spot_prefix": manager.manager_spot_prefix,
-        "offices": [{"id": o.id, "name": o.name} for o in offices]
+        "managed_user_count": managed_user_count
     }
 
 
@@ -131,19 +127,16 @@ def update_manager_settings(manager_id: str, data: ManagerSettingsUpdate, db: Se
 
 @router.get("/{manager_id}/users")
 def get_manager_users(manager_id: str, db: Session = Depends(get_db), user=Depends(require_manager_or_admin)):
-    """Get all users from offices managed by this manager"""
+    """Get all users in a manager's team (including the manager themselves)"""
     manager = db.query(User).filter(User.id == manager_id, User.role == "manager").first()
     if not manager:
         raise HTTPException(status_code=404, detail="Manager not found")
 
-    memberships = db.query(OfficeMembership).filter(OfficeMembership.user_id == manager_id).all()
-    managed_office_ids = [m.office_id for m in memberships]
-
-    if not managed_office_ids:
-        return []
-
-    users = db.query(User).filter(User.office_id.in_(managed_office_ids)).all()
-    return [{"id": u.id, "name": u.name, "email": u.email, "role": u.role, "office_id": u.office_id} for u in users]
+    # Include users managed by this manager + the manager themselves
+    users = db.query(User).filter(
+        (User.manager_id == manager_id) | (User.id == manager_id)
+    ).all()
+    return [{"id": u.id, "name": u.name, "email": u.email, "role": u.role} for u in users]
 
 
 # Closing days