feat(call): integrate call handling and WebSocket support

- Added CallHandler and related services for managing call sessions and participants.
- Enhanced WSHandler to support call signaling, including invite, answer, reject, and end functionalities.
- Updated router to include call-related routes for history and ICE server retrieval.
- Introduced WebRTC configuration in the application settings for call management.
- Refactored wire generation to include CallService and CallRepository for improved dependency injection.

internal/config/config.go

@@ -29,6 +29,7 @@ type Config struct {
 	Casbin            CasbinConfig            `mapstructure:"casbin"`
 	Encryption        EncryptionConfig        `mapstructure:"encryption"`
 	HotRank           HotRankConfig           `mapstructure:"hot_rank"`
+	WebRTC            WebRTCConfig            `mapstructure:"webrtc"`
 }
 
 // Load 加载配置文件
@@ -150,6 +151,10 @@ func Load(configPath string) (*Config, error) {
 	viper.SetDefault("hot_rank.recent_window_hours", 168)
 	viper.SetDefault("hot_rank.recent_fetch_limit", 500)
 	viper.SetDefault("hot_rank.candidate_cap", 800)
+	// WebRTC 默认值（Google 公共 STUN 服务器）
+	viper.SetDefault("webrtc.ice_servers", []map[string]interface{}{
+		{"urls": []string{"stun:stun.l.google.com:19302"}},
+	})
 
 	if err := viper.ReadInConfig(); err != nil {
 		return nil, fmt.Errorf("failed to read config: %w", err)

internal/config/webrtc.go

@@ -0,0 +1,13 @@
+package config
+
+// WebRTCConfig WebRTC ICE 服务器配置
+type WebRTCConfig struct {
+	ICEServers []ICEServerConfig `mapstructure:"ice_servers"`
+}
+
+// ICEServerConfig ICE 服务器配置
+type ICEServerConfig struct {
+	URLs       []string `mapstructure:"urls"`
+	Username   string   `mapstructure:"username"`
+	Credential string   `mapstructure:"credential"`
+}