fix(opencode): fix add/remove provider flow and toast messages

- Create separate removeFromLiveConfig API for additive mode apps
  (remove only removes from live config, not database)
- Fix useSwitchProviderMutation to invalidate opencodeLiveProviderIds
  cache so button state updates correctly after add operation
- Show appropriate toast messages:
  - Add: "已添加到配置" / "Added to config"
  - Remove: "已从配置移除" / "Removed from config"
- Add i18n texts for addToConfigSuccess and removeFromConfigSuccess

src/lib/api/providers.ts

@@ -38,6 +38,14 @@ export const providersApi = {
     return await invoke("delete_provider", { id, app: appId });
   },
 
+  /**
+   * Remove provider from live config only (for additive mode apps like OpenCode)
+   * Does NOT delete from database - provider remains in the list
+   */
+  async removeFromLiveConfig(id: string, appId: AppId): Promise<boolean> {
+    return await invoke("remove_provider_from_live_config", { id, app: appId });
+  },
+
   async switch(id: string, appId: AppId): Promise<boolean> {
     return await invoke("switch_provider", { id, app: appId });
   },

src/lib/query/mutations.ts

@@ -155,6 +155,13 @@ export const useSwitchProviderMutation = (appId: AppId) => {
     onSuccess: async () => {
       await queryClient.invalidateQueries({ queryKey: ["providers", appId] });
 
+      // OpenCode: also invalidate live provider IDs cache to update button state
+      if (appId === "opencode") {
+        await queryClient.invalidateQueries({
+          queryKey: ["opencodeLiveProviderIds"],
+        });
+      }
+
       // 更新托盘菜单（失败不影响主操作）
       try {
         await providersApi.updateTrayMenu();
@@ -165,15 +172,17 @@ export const useSwitchProviderMutation = (appId: AppId) => {
         );
       }
 
-      toast.success(
-        t("notifications.switchSuccess", {
-          defaultValue: "切换供应商成功",
-          appName: t(`apps.${appId}`, { defaultValue: appId }),
-        }),
-        {
-          closeButton: true,
-        },
-      );
+      // OpenCode: show "added to config" message instead of "switched"
+      const messageKey =
+        appId === "opencode"
+          ? "notifications.addToConfigSuccess"
+          : "notifications.switchSuccess";
+      const defaultMessage =
+        appId === "opencode" ? "已添加到配置" : "切换供应商成功";
+
+      toast.success(t(messageKey, { defaultValue: defaultMessage }), {
+        closeButton: true,
+      });
     },
     onError: (error: Error) => {
       const detail = extractErrorMessage(error) || t("common.unknown");