feat: add FSM handlers and admin interface

- Add all user FSM states (INTRO through CONFIRM_SAVE)
- Add replica re-recording by number (ASK_REPLICA_NUMBER, REPEAT_REPLICA)
- Add admin interface with stats and scenario upload
- Add voice message handling and storage

src/database.py

@@ -164,7 +164,11 @@ def get_or_create_user(telegram_id: int) -> User:
         row = cursor.fetchone()
 
         if row:
-            return User(id=row["id"], telegram_id=row["telegram_id"], created_at=row["created_at"])
+            return User(
+                id=row["id"],
+                telegram_id=row["telegram_id"],
+                created_at=row["created_at"],
+            )
 
         cursor = conn.execute(
             "INSERT INTO users (telegram_id) VALUES (?) RETURNING id, telegram_id, created_at",
@@ -173,7 +177,9 @@ def get_or_create_user(telegram_id: int) -> User:
         row = cursor.fetchone()
         conn.commit()
         logger.info(f"Создан новый пользователь: dataset_speaker_id={row['id']}")
-        return User(id=row["id"], telegram_id=row["telegram_id"], created_at=row["created_at"])
+        return User(
+            id=row["id"], telegram_id=row["telegram_id"], created_at=row["created_at"]
+        )
 
 
 def get_user_by_telegram_id(telegram_id: int) -> User | None:
@@ -185,7 +191,11 @@ def get_user_by_telegram_id(telegram_id: int) -> User | None:
         )
         row = cursor.fetchone()
         if row:
-            return User(id=row["id"], telegram_id=row["telegram_id"], created_at=row["created_at"])
+            return User(
+                id=row["id"],
+                telegram_id=row["telegram_id"],
+                created_at=row["created_at"],
+            )
         return None
 
 
@@ -221,8 +231,13 @@ def get_scenario(scenario_id: str) -> Scenario | None:
 def get_all_scenarios() -> list[Scenario]:
     """Получает все сценарии."""
     with get_connection() as conn:
-        cursor = conn.execute("SELECT id, created_at FROM scenarios ORDER BY created_at")
-        return [Scenario(id=row["id"], created_at=row["created_at"]) for row in cursor.fetchall()]
+        cursor = conn.execute(
+            "SELECT id, created_at FROM scenarios ORDER BY created_at"
+        )
+        return [
+            Scenario(id=row["id"], created_at=row["created_at"])
+            for row in cursor.fetchall()
+        ]
 
 
 # === Replicas CRUD ===
@@ -233,7 +248,10 @@ def create_replicas(scenario_id: str, replicas: list[tuple[int, int, str]]) -> N
     with get_connection() as conn:
         conn.executemany(
             "INSERT INTO replicas (scenario_id, speaker_id, replica_index, text) VALUES (?, ?, ?, ?)",
-            [(scenario_id, speaker_id, idx, text) for speaker_id, idx, text in replicas],
+            [
+                (scenario_id, speaker_id, idx, text)
+                for speaker_id, idx, text in replicas
+            ],
         )
         conn.commit()
 
@@ -383,7 +401,9 @@ def get_user_session(user_id: int) -> UserSession | None:
                 scenario_id=row["scenario_id"],
                 speaker_id=row["speaker_id"],
                 replica_index=row["replica_index"],
-                previous_state=UserState(row["previous_state"]) if row["previous_state"] else None,
+                previous_state=UserState(row["previous_state"])
+                if row["previous_state"]
+                else None,
                 last_bot_message_id=row["last_bot_message_id"],
             )
         return None
@@ -437,10 +457,14 @@ def get_stats() -> dict:
         stats = {}
 
         # Общее количество сценариев
-        stats["total_scenarios"] = conn.execute("SELECT COUNT(*) FROM scenarios").fetchone()[0]
+        stats["total_scenarios"] = conn.execute(
+            "SELECT COUNT(*) FROM scenarios"
+        ).fetchone()[0]
 
         # Общее количество реплик
-        stats["total_replicas"] = conn.execute("SELECT COUNT(*) FROM replicas").fetchone()[0]
+        stats["total_replicas"] = conn.execute(
+            "SELECT COUNT(*) FROM replicas"
+        ).fetchone()[0]
 
         # Общее количество дорожек
         stats["total_tracks"] = conn.execute(
@@ -451,7 +475,9 @@ def get_stats() -> dict:
         stats["total_users"] = conn.execute("SELECT COUNT(*) FROM users").fetchone()[0]
 
         # Количество озвученных реплик
-        stats["total_recordings"] = conn.execute("SELECT COUNT(*) FROM recordings").fetchone()[0]
+        stats["total_recordings"] = conn.execute(
+            "SELECT COUNT(*) FROM recordings"
+        ).fetchone()[0]
 
         # Количество полностью озвученных дорожек (в data/)
         # Это вычисляется по файловой системе, здесь примерная оценка