feat: auto-fallback to Clash proxy on scheduled subscription updates; refactor fallback logic and add request timeout

src/components/profile/profile-item.tsx

@@ -183,12 +183,6 @@ export const ProfileItem = (props: Props) => {
     setAnchorEl(null);
     setLoadingCache((cache) => ({ ...cache, [itemData.uid]: true }));
 
-    // 存储原始设置以便回退后恢复
-    const originalOptions = { 
-      with_proxy: itemData.option?.with_proxy,
-      self_proxy: itemData.option?.self_proxy
-    };
-
     // 根据类型设置初始更新选项
     const option: Partial<IProfileOption> = {};
     if (type === 0) {
@@ -205,31 +199,15 @@ export const ProfileItem = (props: Props) => {
     }
 
     try {
-      // 尝试正常更新
+      // 调用后端更新（后端会自动处理回退逻辑）
       await updateProfile(itemData.uid, option);
+      
+      // 更新成功，刷新列表
       Notice.success(t("Update subscription successfully"));
       mutate("getProfiles");
     } catch (err: any) {
-      // 更新失败，尝试使用自身代理
-      const errmsg = err?.message || err.toString();
-      Notice.info(t("Update failed, retrying with Clash proxy..."));
-      
-      try {
-        await updateProfile(itemData.uid, {
-          with_proxy: false,
-          self_proxy: true
-        });
-        
-        Notice.success(t("Update with Clash proxy successfully"));
-        
-        await updateProfile(itemData.uid, originalOptions);
-        mutate("getProfiles");
-      } catch (retryErr: any) {
-        const retryErrmsg = retryErr?.message || retryErr.toString();
-        Notice.error(
-          `${t("Update failed even with Clash proxy")}: ${retryErrmsg.replace(/error sending request for url (\S+?): /, "")}`,
-        );
-      }
+      // 更新完全失败（包括后端的回退尝试）
+      // 不需要做处理，后端会通过事件通知系统发送错误
     } finally {
       setLoadingCache((cache) => ({ ...cache, [itemData.uid]: false }));
     }

src/components/profile/profile-viewer.tsx

@@ -262,6 +262,25 @@ export const ProfileViewer = forwardRef<ProfileViewerRef, Props>(
                 />
               )}
             />
+            
+            <Controller
+              name="option.timeout_seconds"
+              control={control}
+              render={({ field }) => (
+                <TextField
+                  {...text}
+                  {...field}
+                  type="number"
+                  placeholder="60"
+                  label={t("HTTP Request Timeout")}
+                  InputProps={{
+                    endAdornment: (
+                      <InputAdornment position="end">{t("seconds")}</InputAdornment>
+                    ),
+                  }}
+                />
+              )}
+            />
           </>
         )}