feat: implement admin panel functionality in Mini App

- Added new API endpoints for admin features: `GET /api/admin/me`, `GET /api/admin/users`, and `PATCH /api/admin/duties/:id` to manage user duties.
- Introduced `UserForAdmin` and `AdminDutyReassignBody` schemas for handling admin-related data.
- Updated documentation to include Mini App design guidelines and admin panel functionalities.
- Enhanced tests for admin API to ensure proper access control and functionality.
- Improved error handling and localization for admin actions.

duty_teller/db/__init__.py

@@ -4,6 +4,7 @@ from duty_teller.db.models import Base, User, Duty, Role
 from duty_teller.db.schemas import (
     UserCreate,
     UserInDb,
+    UserForAdmin,
     DutyCreate,
     DutyInDb,
     DutyWithUser,
@@ -16,11 +17,14 @@ from duty_teller.db.session import (
 )
 from duty_teller.db.repository import (
     delete_duties_in_range,
+    get_duties,
+    get_duty_by_id,
     get_or_create_user,
     get_or_create_user_by_full_name,
-    get_duties,
+    get_users_for_admin,
     insert_duty,
     set_user_phone,
+    update_duty_user,
     update_user_display_name,
 )
 
@@ -31,6 +35,7 @@ __all__ = [
     "Role",
     "UserCreate",
     "UserInDb",
+    "UserForAdmin",
     "DutyCreate",
     "DutyInDb",
     "DutyWithUser",
@@ -39,11 +44,14 @@ __all__ = [
     "get_session",
     "session_scope",
     "delete_duties_in_range",
+    "get_duties",
+    "get_duty_by_id",
     "get_or_create_user",
     "get_or_create_user_by_full_name",
-    "get_duties",
+    "get_users_for_admin",
     "insert_duty",
     "set_user_phone",
+    "update_duty_user",
     "update_user_display_name",
     "init_db",
 ]