fix: send-proactive adapter查找 — 先按名再按平台类型回退

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

@@ -200,9 +200,18 @@ func (h *BridgeHandler) sendProactive(w http.ResponseWriter, r *http.Request) {
 		content = fmt.Sprintf("[CQ:at,qq=%s] %s", req.AtUserID, content)
 	}
 
-	// Find the adapter. For OBv11, use the platform name as adapter name.
+	// Resolve adapter: try exact name first, then find by platform type.
 	adapterName := req.Platform
 	err := h.router.SendProactive(adapterName, msgType, userID, groupID, content)
+	if err != nil {
+		for _, name := range h.router.ListAdapters() {
+			if a, aErr := h.router.GetAdapter(name); aErr == nil && a.PlatformName() == req.Platform && a.IsConnected() {
+				adapterName = name
+				err = h.router.SendProactive(name, msgType, userID, groupID, content)
+				break
+			}
+		}
+	}
 	if err != nil {
 		log.Printf("[send-proactive] 发送失败: adapter=%s err=%v", adapterName, err)
 		writeJSON(w, http.StatusInternalServerError, errResp("send failed: "+err.Error()))