feat: add rate limiting and improve event handling

- Introduced rate limiting configuration in config.toml with options for enabling, requests per second (RPS), and burst capacity.
- Enhanced event handling in the OneBot11 adapter to ignore messages sent by the bot itself.
- Updated the dispatcher to register rate limit middleware based on configuration settings.
- Refactored WebSocket message handling to support flexible JSON parsing and improved event type detection.
- Removed deprecated echo plugin and associated tests to streamline the codebase.

internal/di/providers.go

@@ -1,14 +1,15 @@
 package di
 
 import (
+	"context"
+
 	"cellbot/internal/adapter/milky"
 	"cellbot/internal/adapter/onebot11"
 	"cellbot/internal/config"
 	"cellbot/internal/engine"
-	"cellbot/internal/plugins/echo"
+	_ "cellbot/internal/plugins/echo" // 导入插件以触发 init 函数
 	"cellbot/internal/protocol"
 	"cellbot/pkg/net"
-	"context"
 
 	"go.uber.org/fx"
 	"go.uber.org/zap"
@@ -41,8 +42,27 @@ func ProvideEventBus(logger *zap.Logger) *engine.EventBus {
 	return engine.NewEventBus(logger, 10000)
 }
 
-func ProvideDispatcher(eventBus *engine.EventBus, logger *zap.Logger) *engine.Dispatcher {
-	return engine.NewDispatcher(eventBus, logger)
+func ProvideDispatcher(eventBus *engine.EventBus, logger *zap.Logger, cfg *config.Config) *engine.Dispatcher {
+	dispatcher := engine.NewDispatcher(eventBus, logger)
+
+	// 注册限流中间件
+	if cfg.Engine.RateLimit.Enabled {
+		rateLimitMiddleware := engine.NewRateLimitMiddleware(
+			logger,
+			cfg.Engine.RateLimit.RPS,
+			cfg.Engine.RateLimit.Burst,
+		)
+		dispatcher.RegisterMiddleware(rateLimitMiddleware)
+		logger.Info("Rate limit middleware registered",
+			zap.Int("rps", cfg.Engine.RateLimit.RPS),
+			zap.Int("burst", cfg.Engine.RateLimit.Burst))
+	}
+
+	return dispatcher
+}
+
+func ProvidePluginRegistry(dispatcher *engine.Dispatcher, logger *zap.Logger) *engine.PluginRegistry {
+	return engine.NewPluginRegistry(dispatcher, logger)
 }
 
 func ProvideBotManager(logger *zap.Logger) *protocol.BotManager {
@@ -129,10 +149,26 @@ func ProvideOneBot11Bots(cfg *config.Config, logger *zap.Logger, wsManager *net.
 	return nil
 }
 
-func ProvideEchoPlugin(logger *zap.Logger, botManager *protocol.BotManager, dispatcher *engine.Dispatcher) {
-	echoPlugin := echo.NewEchoPlugin(logger, botManager)
-	dispatcher.RegisterHandler(echoPlugin)
-	logger.Info("Echo plugin registered")
+// LoadPlugins 加载所有插件
+func LoadPlugins(logger *zap.Logger, botManager *protocol.BotManager, registry *engine.PluginRegistry) {
+	// 从全局注册表加载所有插件（通过 RegisterPlugin 注册的）
+	plugins := engine.LoadAllPlugins(botManager, logger)
+	for _, plugin := range plugins {
+		registry.Register(plugin)
+	}
+
+	// 加载所有通过 OnXXX().Handle() 注册的处理器（注入依赖）
+	handlers := engine.LoadAllHandlers(botManager, logger)
+	for _, handler := range handlers {
+		registry.Register(handler)
+	}
+
+	totalCount := len(plugins) + len(handlers)
+	logger.Info("All plugins loaded",
+		zap.Int("plugin_count", len(plugins)),
+		zap.Int("handler_count", len(handlers)),
+		zap.Int("total_count", totalCount),
+		zap.Strings("plugins", engine.GetRegisteredPlugins()))
 }
 
 var Providers = fx.Options(
@@ -142,11 +178,12 @@ var Providers = fx.Options(
 		ProvideLogger,
 		ProvideEventBus,
 		ProvideDispatcher,
+		ProvidePluginRegistry,
 		ProvideBotManager,
 		ProvideWebSocketManager,
 		ProvideServer,
 	),
 	fx.Invoke(ProvideMilkyBots),
 	fx.Invoke(ProvideOneBot11Bots),
-	fx.Invoke(ProvideEchoPlugin),
+	fx.Invoke(LoadPlugins),
 )