feat: implement /recover command and fix /admin list

- Add /recover command for listing and recovering soft-deleted bounties
  - /recover - list recoverable bounties (admin only)
  - /recover <id> [<id>...] - recover specific bounties (admin only)
- Fix /admin list to show @username instead of admin_id
- Add recover_bounty and recover_bounties methods to BountyService
- Add get_deleted_bounty method to BountyService
- Clean up duplicate cmd_admin functions
- Add /recover to bot command menu
- Fixes #49 and #50

core/services.py

@@ -153,6 +153,44 @@ class BountyService:
         all_bounties = self._storage.list_all_bounties(room_id, include_deleted=True)
         return [b for b in all_bounties if b.deleted_at is not None]
 
+    def get_deleted_bounty(self, room_id: int, bounty_id: int) -> Bounty | None:
+        """Get a specific soft-deleted bounty by ID."""
+        all_bounties = self._storage.list_all_bounties(room_id, include_deleted=True)
+        for b in all_bounties:
+            if b.id == bounty_id and b.deleted_at is not None:
+                return b
+        return None
+
+    def recover_bounty(self, room_id: int, bounty_id: int, user_id: int) -> str:
+        """Recover a soft-deleted bounty. Admin only.
+
+        Returns: 'recovered', 'not_found', 'not_deleted', 'permission_denied'
+        """
+        if not self.is_admin(room_id, user_id):
+            return "permission_denied"
+
+        bounty = self.get_deleted_bounty(room_id, bounty_id)
+        if not bounty:
+            return "not_found"
+        if bounty.deleted_at is None:
+            return "not_deleted"
+
+        bounty.deleted_at = None
+        self._storage.update_bounty(room_id, bounty)
+        return "recovered"
+
+    def recover_bounties(
+        self, room_id: int, bounty_ids: list[int], user_id: int
+    ) -> dict[int, str]:
+        """Recover multiple soft-deleted bounties. Admin only.
+
+        Returns dict of bounty_id -> result ('recovered', 'not_found', 'not_deleted', 'permission_denied')
+        """
+        results = {}
+        for bounty_id in bounty_ids:
+            results[bounty_id] = self.recover_bounty(room_id, bounty_id, user_id)
+        return results
+
     def get_bounty(self, room_id: int, bounty_id: int) -> Bounty | None:
         """Get a specific bounty by ID. Excludes soft-deleted bounties."""
         bounty = self._storage.get_bounty(room_id, bounty_id)