chore: ethend QQ→OBv11 + config.js环境变量同步 + curQQ变量重命名

- ethend: QQ_BOT_PORT→OBV11_BOT_PORT, QQ_ADMIN_UID→OBV11_ADMIN_UID
- ethend UI: QQ→OBv11 标签, 企鹅图标→🔷, 对话框文案
- platform-bridge: curQQ→curAdapter 变量名

Co-Authored-By: Claude <noreply@anthropic.com>

backend/platform-bridge/cmd/main.go

@@ -438,16 +438,16 @@ func startOBv11Readers(router *bridge.PlatformRouter) {
 							if err != nil {
 								continue
 							}
-							curQQ, ok := cur.(*qqadapter.Adapter)
+							curAdapter, ok := cur.(*qqadapter.Adapter)
 							if !ok {
 								continue
 							}
 							var sendErr error
 							switch messageType {
 							case "private":
-								sendErr = curQQ.SendMessage("private", userID, 0, rm.Content)
+								sendErr = curAdapter.SendMessage("private", userID, 0, rm.Content)
 							case "group":
-								sendErr = curQQ.SendMessage("group", 0, groupID, rm.Content)
+								sendErr = curAdapter.SendMessage("group", 0, groupID, rm.Content)
 							}
 							if sendErr != nil {
 								fmt.Printf("[qq:%s] send msg error: %v\n", adapterKey, sendErr)