新增积分转账功能：支持管理员手动扣除和划转用户积分

src/database/db_manager.py

@@ -1258,6 +1258,80 @@ class DBManager:
                 "points_after": after,
             }
 
+    def deduct_points_by_supabase_email(
+        self,
+        supabase_email: str,
+        amount: int,
+    ) -> Dict[str, Any]:
+        email = str(supabase_email or "").strip().lower()
+        points = int(amount or 0)
+        if not email:
+            return {"ok": False, "reason": "invalid_supabase_email"}
+        if points <= 0:
+            return {"ok": False, "reason": "invalid_amount"}
+
+        with self._get_connection() as conn:
+            conn.row_factory = sqlite3.Row
+            row = conn.execute(
+                """
+                SELECT telegram_id, username, points, supabase_email
+                FROM users
+                WHERE lower(trim(COALESCE(supabase_email, ''))) = ?
+                LIMIT 1
+                """,
+                (email,),
+            ).fetchone()
+            if not row:
+                return {"ok": False, "reason": "user_not_found", "supabase_email": email}
+
+            telegram_id = int(row["telegram_id"] or 0)
+            before = int(row["points"] or 0)
+            if before < points:
+                return {
+                    "ok": False,
+                    "reason": "insufficient_points",
+                    "points_available": before,
+                    "points_needed": points,
+                }
+            after = before - points
+            conn.execute(
+                "UPDATE users SET points = ? WHERE telegram_id = ?",
+                (after, telegram_id),
+            )
+            conn.commit()
+            self._sync_points_to_supabase_user_metadata(telegram_id)
+            return {
+                "ok": True,
+                "telegram_id": telegram_id,
+                "username": str(row["username"] or ""),
+                "supabase_email": str(row["supabase_email"] or email),
+                "points_before": before,
+                "points_deducted": points,
+                "points_after": after,
+            }
+
+    def transfer_points_by_email(
+        self,
+        from_email: str,
+        to_email: str,
+        amount: int,
+    ) -> Dict[str, Any]:
+        """Transfer points from one user to another within a single transaction."""
+        r_from = self.deduct_points_by_supabase_email(from_email, amount)
+        if not r_from.get("ok"):
+            return {"ok": False, "reason": f"deduct_failed: {r_from.get('reason')}", "from": r_from}
+        r_to = self.grant_points_by_supabase_email(to_email, amount)
+        if not r_to.get("ok"):
+            # Rollback: grant back to source
+            self.grant_points_by_supabase_email(from_email, amount)
+            return {"ok": False, "reason": f"grant_failed: {r_to.get('reason')}", "to": r_to}
+        return {
+            "ok": True,
+            "from": r_from,
+            "to": r_to,
+            "amount": amount,
+        }
+
     def upsert_user(self, telegram_id: int, username: str):
         with self._get_connection() as conn:
             conn.execute("""