chore: 清除最后5处硬编码qq引用（注释+配置白名单）

backend/platform-bridge/internal/handler/config_handler.go

@@ -9,7 +9,7 @@ import (
 )
 
 var validPlatformTypes = map[string]bool{
-	"qq": true, "telegram": true, "webhook": true,
+	"obv11": true, "telegram": true, "webhook": true,
 	"wechat": true, "feishu": true, "discord": true,
 }
 

backend/platform-bridge/internal/handler/log_handler.go

@@ -29,7 +29,7 @@ func (h *LogHandler) handleLogs(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Resolve platform type from config name (e.g. "qq-home" → "qq").
+	// Resolve platform type from config name (e.g. "obv11-home" → "obv11").
 	platform := name
 	if h.store != nil {
 		if cfg, err := h.store.Get(name); err == nil && cfg.Platform != "" {