refactor(server): decouple services and improve architecture

- Introduce interfaces for all major services (JWT, PostAI, Comment, Message, Notification, QRCodeLogin, Upload, Vote, etc.) to support dependency inversion.
- Move query parameters from `internal/dto` to a new `internal/query` package to separate request payloads from data transfer objects.
- Refactor `internal/router` to use embedded `RouterDeps` for cleaner dependency management.
- Decouple handlers from repositories by injecting services instead of direct repository access, ensuring proper layering.
- Improve database initialization by moving it from `internal/model` to `internal/database`.
- Optimize message decryption by implementing a more efficient `BatchDecrypt` method in `MessageEncryptor` using a worker pool.
- Enhance error handling and security by implementing fail-fast checks for encryption key length during startup.
- Clean up unused code, including the `avatar` package and several unused DTOs.

internal/service/call_service.go

@@ -26,11 +26,11 @@ const (
 	CallLifetimeMs = 60000  // 通话邀请有效期 60秒 (参考 Matrix)
 	CallTimeoutMs  = 120000 // 通话超时(无人接听) 120秒
 
-	redisCallKeyPrefix      = "call:"
-	redisCallByUserPrefix   = "call_by_user:"
-	redisCallAcceptPrefix   = "call:accept:"
-	redisCallTTL             = 120 * time.Second
-	redisCallAcceptLockTTL  = 10 * time.Second
+	redisCallKeyPrefix     = "call:"
+	redisCallByUserPrefix  = "call_by_user:"
+	redisCallAcceptPrefix  = "call:accept:"
+	redisCallTTL           = 120 * time.Second
+	redisCallAcceptLockTTL = 10 * time.Second
 )
 
 // activeCallRedisData Redis 中存储的通话数据（精简字段）
@@ -431,7 +431,7 @@ func (s *callService) Invite(ctx context.Context, callerID, calleeID, conversati
 			callerID: {UserID: callerID, Status: model.ParticipantStatusJoined, JoinedAt: &now},
 			calleeID: {UserID: calleeID, Status: model.ParticipantStatusInvited},
 		},
-			}
+	}
 
 	// 存储到内存
 	s.storeActiveCall(call)
@@ -451,7 +451,7 @@ func (s *callService) Invite(ctx context.Context, callerID, calleeID, conversati
 		"media_type":      mediaType,
 		"created_at":      now.UnixMilli(),
 		"lifetime":        CallLifetimeMs,
-			}
+	}
 
 	online := s.hub.PublishToUserOnline(calleeID, "call_incoming", payload)
 
@@ -510,9 +510,9 @@ func (s *callService) Accept(ctx context.Context, callID, userID string) (*Activ
 
 	// 通知拨打方
 	s.hub.PublishToUserOnline(call.CallerID, "call_accepted", map[string]any{
-		"call_id":     callID,
-		"started_at":  now.UnixMilli(),
-			})
+		"call_id":    callID,
+		"started_at": now.UnixMilli(),
+	})
 
 	// 通知被叫方其他设备
 	s.hub.PublishToUserOnline(userID, "call_answered_elsewhere", map[string]any{
@@ -896,7 +896,6 @@ func (s *callService) GetCallHistory(ctx context.Context, userID string, page, p
 	return s.callRepo.GetCallHistory(userID, page, pageSize)
 }
 
-
 // saveCallHistory 保存通话历史到数据库
 func (s *callService) saveCallHistory(call *ActiveCall, status model.CallStatus, duration int64, endedBy string) {
 	ctx := context.Background()