diff --git a/tests/components/SettingsDialog.test.tsx b/tests/components/SettingsDialog.test.tsx
index 844309f..c1a45a1 100644
--- a/tests/components/SettingsDialog.test.tsx
+++ b/tests/components/SettingsDialog.test.tsx
@@ -1,5 +1,5 @@
 import { render, screen, fireEvent, waitFor } from "@testing-library/react";
-import { describe, it, expect, vi, beforeEach } from "vitest";
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
 import { createContext, useContext } from "react";
 import { SettingsDialog } from "@/components/settings/SettingsDialog";
 
@@ -104,13 +104,16 @@ const createImportExportMock = (overrides: Partial<ImportExportMock> = {}) => {
 
 let settingsMock = createSettingsMock();
 let importExportMock = createImportExportMock();
+const useImportExportSpy = vi.fn();
+let lastUseImportExportOptions: Record<string, unknown> | undefined;
 
 vi.mock("@/hooks/useSettings", () => ({
   useSettings: () => settingsMock,
 }));
 
 vi.mock("@/hooks/useImportExport", () => ({
-  useImportExport: () => importExportMock,
+  useImportExport: (options?: Record<string, unknown>) =>
+    useImportExportSpy(options),
 }));
 
 vi.mock("@/lib/api", () => ({
@@ -177,8 +180,22 @@ vi.mock("@/components/settings/WindowSettings", () => ({
 }));
 
 vi.mock("@/components/settings/DirectorySettings", () => ({
-  DirectorySettings: ({ onBrowseDirectory }: any) => (
-    <button onClick={() => onBrowseDirectory("claude")}>browse-directory</button>
+  DirectorySettings: ({
+    onBrowseDirectory,
+    onResetDirectory,
+    onDirectoryChange,
+    onBrowseAppConfig,
+    onResetAppConfig,
+    onAppConfigChange,
+  }: any) => (
+    <div>
+      <button onClick={() => onBrowseDirectory("claude")}>browse-directory</button>
+      <button onClick={() => onResetDirectory("claude")}>reset-directory</button>
+      <button onClick={() => onDirectoryChange("codex", "/new/path")}>change-directory</button>
+      <button onClick={() => onBrowseAppConfig()}>browse-app-config</button>
+      <button onClick={() => onResetAppConfig()}>reset-app-config</button>
+      <button onClick={() => onAppConfigChange("/app/new")}>change-app-config</button>
+    </div>
   ),
 }));
 
@@ -193,12 +210,22 @@ describe("SettingsDialog Component", () => {
     tMock.mockImplementation((key: string) => key);
     settingsMock = createSettingsMock();
     importExportMock = createImportExportMock();
+    useImportExportSpy.mockReset();
+    useImportExportSpy.mockImplementation((options?: Record<string, unknown>) => {
+      lastUseImportExportOptions = options;
+      return importExportMock;
+    });
+    lastUseImportExportOptions = undefined;
     toastSuccessMock.mockReset();
     toastErrorMock.mockReset();
     settingsApi = (await import("@/lib/api")).settingsApi;
     settingsApi.restart.mockClear();
   });
 
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
   it("should not render form content when loading", () => {
     settingsMock = createSettingsMock({ settings: null, isLoading: true });
 
@@ -208,9 +235,21 @@ describe("SettingsDialog Component", () => {
     expect(screen.getByText("settings.title")).toBeInTheDocument();
   });
 
+  it("should reset import/export status when dialog transitions to open", () => {
+    const { rerender } = render(
+      <SettingsDialog open={false} onOpenChange={vi.fn()} />,
+    );
+
+    importExportMock.resetStatus.mockClear();
+
+    rerender(<SettingsDialog open={true} onOpenChange={vi.fn()} />);
+
+    expect(importExportMock.resetStatus).toHaveBeenCalledTimes(1);
+  });
+
   it("should render general and advanced tabs and trigger child callbacks", () => {
     const onOpenChange = vi.fn();
-    importExportMock = createImportExportMock({ selectedFile: "" });
+    importExportMock = createImportExportMock({ selectedFile: "/tmp/config.json" });
 
     render(<SettingsDialog open={true} onOpenChange={onOpenChange} />);
 
@@ -227,6 +266,37 @@ describe("SettingsDialog Component", () => {
     fireEvent.click(screen.getByRole("button", { name: "settings.selectConfigFile" }));
 
     expect(importExportMock.selectImportFile).toHaveBeenCalled();
+
+    fireEvent.click(screen.getByRole("button", { name: "settings.exportConfig" }));
+    expect(importExportMock.exportConfig).toHaveBeenCalled();
+
+    fireEvent.click(screen.getByRole("button", { name: "settings.import" }));
+    expect(importExportMock.importConfig).toHaveBeenCalled();
+
+    fireEvent.click(screen.getByRole("button", { name: "common.clear" }));
+    expect(importExportMock.clearSelection).toHaveBeenCalled();
+  });
+
+  it("should pass onImportSuccess callback to useImportExport hook", async () => {
+    const onImportSuccess = vi.fn();
+
+    render(
+      <SettingsDialog
+        open={true}
+        onOpenChange={vi.fn()}
+        onImportSuccess={onImportSuccess}
+      />,
+    );
+
+    expect(useImportExportSpy).toHaveBeenCalledWith(
+      expect.objectContaining({ onImportSuccess }),
+    );
+    expect(lastUseImportExportOptions?.onImportSuccess).toBe(onImportSuccess);
+
+    if (typeof lastUseImportExportOptions?.onImportSuccess === "function") {
+      await lastUseImportExportOptions.onImportSuccess();
+    }
+    expect(onImportSuccess).toHaveBeenCalledTimes(1);
   });
 
   it("should call saveSettings and close dialog when clicking save", async () => {
@@ -276,4 +346,48 @@ describe("SettingsDialog Component", () => {
       expect(toastSuccessMock).toHaveBeenCalledWith("settings.devModeRestartHint");
     });
   });
+
+  it("should allow postponing restart and close dialog without restarting", async () => {
+    const onOpenChange = vi.fn();
+    settingsMock = createSettingsMock({ requiresRestart: true });
+
+    render(<SettingsDialog open={true} onOpenChange={onOpenChange} />);
+
+    expect(await screen.findByText("settings.restartRequired")).toBeInTheDocument();
+
+    fireEvent.click(screen.getByText("settings.restartLater"));
+
+    await waitFor(() => {
+      expect(onOpenChange).toHaveBeenCalledWith(false);
+      expect(settingsMock.acknowledgeRestart).toHaveBeenCalledTimes(1);
+    });
+
+    expect(settingsApi.restart).not.toHaveBeenCalled();
+    expect(toastSuccessMock).not.toHaveBeenCalled();
+    expect(toastErrorMock).not.toHaveBeenCalled();
+  });
+
+  it("should trigger directory management callbacks inside advanced tab", () => {
+    render(<SettingsDialog open={true} onOpenChange={vi.fn()} />);
+
+    fireEvent.click(screen.getByText("settings.tabAdvanced"));
+
+    fireEvent.click(screen.getByText("browse-directory"));
+    expect(settingsMock.browseDirectory).toHaveBeenCalledWith("claude");
+
+    fireEvent.click(screen.getByText("reset-directory"));
+    expect(settingsMock.resetDirectory).toHaveBeenCalledWith("claude");
+
+    fireEvent.click(screen.getByText("change-directory"));
+    expect(settingsMock.updateDirectory).toHaveBeenCalledWith("codex", "/new/path");
+
+    fireEvent.click(screen.getByText("browse-app-config"));
+    expect(settingsMock.browseAppConfigDir).toHaveBeenCalledTimes(1);
+
+    fireEvent.click(screen.getByText("reset-app-config"));
+    expect(settingsMock.resetAppConfigDir).toHaveBeenCalledTimes(1);
+
+    fireEvent.click(screen.getByText("change-app-config"));
+    expect(settingsMock.updateAppConfigDir).toHaveBeenCalledWith("/app/new");
+  });
 });
diff --git a/tests/integration/App.test.tsx b/tests/integration/App.test.tsx
new file mode 100644
index 0000000..6b4d050
--- /dev/null
+++ b/tests/integration/App.test.tsx
@@ -0,0 +1,395 @@
+import { Suspense } from "react";
+import { describe, it, expect, vi, beforeEach, beforeAll } from "vitest";
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+
+const {
+  toastSuccessMock,
+  toastErrorMock,
+  deleteProviderMock,
+  addProviderMock,
+  updateProviderMock,
+  saveUsageScriptMock,
+  onSwitchedMock,
+  updateSortOrderMock,
+  updateTrayMenuMock,
+  openExternalMock,
+  useProvidersQueryMock,
+  useProviderActionsMock,
+  providersDataMock,
+  getAllMock,
+  getCurrentMock,
+  importDefaultMock,
+} = vi.hoisted(() => {
+  const deleteProviderMock = vi.fn();
+  const addProviderMock = vi.fn();
+  const updateProviderMock = vi.fn();
+  const saveUsageScriptMock = vi.fn();
+  const onSwitchedMock = vi.fn();
+  const updateSortOrderMock = vi.fn();
+  const updateTrayMenuMock = vi.fn();
+  const openExternalMock = vi.fn();
+  const useProvidersQueryMock = vi.fn();
+  const getAllMock = vi.fn();
+  const getCurrentMock = vi.fn();
+  const importDefaultMock = vi.fn();
+  const toastSuccessMock = vi.fn();
+  const toastErrorMock = vi.fn();
+
+  const providersDataMock = {
+    claude: [
+      {
+        id: "claude-1",
+        name: "Claude Default",
+        settingsConfig: {},
+        category: "default",
+        sortIndex: 0,
+      },
+      {
+        id: "claude-2",
+        name: "Claude Custom",
+        settingsConfig: {},
+        category: "custom",
+        sortIndex: 1,
+      },
+    ],
+    codex: [
+      {
+        id: "codex-1",
+        name: "Codex Default",
+        settingsConfig: {},
+        category: "default",
+        sortIndex: 0,
+      },
+      {
+        id: "codex-2",
+        name: "Codex Secondary",
+        settingsConfig: {},
+        category: "custom",
+        sortIndex: 1,
+      },
+    ],
+  };
+
+  const useProviderActionsMock = vi.fn(() => ({
+    addProvider: addProviderMock,
+    updateProvider: updateProviderMock,
+    deleteProvider: deleteProviderMock,
+    saveUsageScript: saveUsageScriptMock,
+  }));
+
+  return {
+    toastSuccessMock,
+    toastErrorMock,
+    deleteProviderMock,
+    addProviderMock,
+    updateProviderMock,
+    saveUsageScriptMock,
+    onSwitchedMock,
+    updateSortOrderMock,
+    updateTrayMenuMock,
+    openExternalMock,
+    useProvidersQueryMock,
+    useProviderActionsMock,
+    providersDataMock,
+    getAllMock,
+    getCurrentMock,
+    importDefaultMock,
+  };
+});
+
+vi.mock("@/lib/query", () => ({
+  useProvidersQuery: (...args: unknown[]) => useProvidersQueryMock(...args),
+}));
+
+vi.mock("@/hooks/useProviderActions", () => ({
+  useProviderActions: () => useProviderActionsMock(),
+}));
+
+vi.mock("@/lib/api", () => ({
+  providersApi: {
+    onSwitched: onSwitchedMock,
+    updateSortOrder: updateSortOrderMock,
+    updateTrayMenu: updateTrayMenuMock,
+    getAll: getAllMock,
+    getCurrent: getCurrentMock,
+    importDefault: importDefaultMock,
+  },
+  settingsApi: {
+    openExternal: openExternalMock,
+  },
+}));
+
+vi.mock("sonner", () => ({
+  toast: {
+    success: toastSuccessMock,
+    error: toastErrorMock,
+  },
+}));
+
+vi.mock("react-i18next", async () => {
+  const actual = await vi.importActual<typeof import("react-i18next")>("react-i18next");
+  return {
+    ...actual,
+    useTranslation: () => ({
+      t: (key: string, options?: Record<string, unknown>) =>
+        options?.defaultValue ?? key,
+    }),
+  };
+});
+
+
+vi.mock("@/components/providers/ProviderList", () => ({
+  ProviderList: ({
+    providers,
+    currentProviderId,
+    onSwitch,
+    onEdit,
+    onDelete,
+    onDuplicate,
+    onConfigureUsage,
+    onOpenWebsite,
+    onCreate,
+  }: any) => (
+    <div>
+      <div data-testid="provider-list">{JSON.stringify(providers)}</div>
+      <button onClick={() => onSwitch({ id: currentProviderId })}>switch</button>
+      <button onClick={() => onEdit({ id: currentProviderId })}>edit</button>
+      <button onClick={() => onDelete({ id: currentProviderId })}>delete</button>
+      <button
+        onClick={() =>
+          onDuplicate(
+            providers[currentProviderId] ?? {
+              id: "claude-1",
+              name: "Claude Default",
+              settingsConfig: {},
+              sortIndex: 0,
+            },
+          )
+        }
+      >
+        duplicate
+      </button>
+      <button onClick={() => onConfigureUsage({ id: currentProviderId })}>
+        usage
+      </button>
+      <button onClick={() => onOpenWebsite("https://example.com")}>
+        open-website
+      </button>
+      <button onClick={() => onCreate?.()}>create</button>
+    </div>
+  ),
+}));
+
+vi.mock("@/components/providers/AddProviderDialog", () => ({
+  AddProviderDialog: ({ open, onOpenChange, onSubmit, appType }: any) =>
+    open ? (
+      <div data-testid="add-provider-dialog">
+        <button onClick={() => onSubmit({ name: "New Provider", appType })}>
+          add-provider
+        </button>
+        <button onClick={() => onOpenChange(false)}>close-add</button>
+      </div>
+    ) : null,
+}));
+
+vi.mock("@/components/providers/EditProviderDialog", () => ({
+  EditProviderDialog: ({ open, provider, onSubmit, onOpenChange }: any) =>
+    open ? (
+      <div data-testid="edit-provider-dialog">
+        <span>{provider?.id}</span>
+        <button
+          onClick={() =>
+            onSubmit({
+              id: provider?.id,
+              name: `${provider?.name}-edited`,
+            })
+          }
+        >
+          save-edit
+        </button>
+        <button onClick={() => onOpenChange(false)}>close-edit</button>
+      </div>
+    ) : null,
+}));
+
+vi.mock("@/components/UsageScriptModal", () => ({
+  default: ({ isOpen, provider, onSave, onClose }: any) =>
+    isOpen ? (
+      <div data-testid="usage-modal">
+        <span>{provider?.id}</span>
+        <button onClick={() => onSave("script-code")}>save-script</button>
+        <button onClick={() => onClose()}>close-usage</button>
+      </div>
+    ) : null,
+}));
+
+vi.mock("@/components/ConfirmDialog", () => ({
+  ConfirmDialog: ({ isOpen, onConfirm, onCancel }: any) =>
+    isOpen ? (
+      <div data-testid="confirm-dialog">
+        <button onClick={() => onConfirm()}>confirm-delete</button>
+        <button onClick={() => onCancel()}>cancel-delete</button>
+      </div>
+    ) : null,
+}));
+
+vi.mock("@/components/settings/SettingsDialog", () => ({
+  SettingsDialog: ({ open, onOpenChange, onImportSuccess }: any) =>
+    open ? (
+      <div data-testid="settings-dialog">
+        <button onClick={() => onImportSuccess?.()}>settings-on-import</button>
+        <button onClick={() => onOpenChange(false)}>close-settings</button>
+      </div>
+    ) : (
+      <button onClick={() => onOpenChange(true)}>open-settings</button>
+    ),
+}));
+
+vi.mock("@/components/AppSwitcher", () => ({
+  AppSwitcher: ({ activeApp, onSwitch }: any) => (
+    <div data-testid="app-switcher">
+      <span>{activeApp}</span>
+      <button onClick={() => onSwitch("codex")}>switch-app</button>
+    </div>
+  ),
+}));
+
+vi.mock("@/components/UpdateBadge", () => ({
+  UpdateBadge: ({ onClick }: any) => (
+    <button onClick={onClick}>update-badge</button>
+  ),
+}));
+
+vi.mock("@/components/mcp/McpPanel", () => ({
+  default: ({ open, onOpenChange }: any) =>
+    open ? (
+      <div data-testid="mcp-panel">
+        <button onClick={() => onOpenChange(false)}>close-mcp</button>
+      </div>
+    ) : (
+      <button onClick={() => onOpenChange(true)}>open-mcp</button>
+    ),
+}));
+
+const mockRefetch = vi.fn();
+
+const queryClient = new QueryClient();
+let AppComponent: typeof import("@/App").default;
+
+describe("App Integration", () => {
+  beforeAll(async () => {
+    const module = await import("@/App");
+    AppComponent = module.default;
+  });
+
+  beforeEach(() => {
+    queryClient.clear();
+    mockRefetch.mockReset();
+    mockRefetch.mockResolvedValue(undefined);
+    useProvidersQueryMock.mockReset();
+    getAllMock.mockReset();
+    getCurrentMock.mockReset();
+    importDefaultMock.mockReset();
+    onSwitchedMock.mockResolvedValue(() => {});
+    updateSortOrderMock.mockResolvedValue(undefined);
+    updateTrayMenuMock.mockResolvedValue(undefined);
+    openExternalMock.mockResolvedValue(undefined);
+
+    useProvidersQueryMock.mockImplementation((appType: string) => {
+      const providers = providersDataMock[appType as keyof typeof providersDataMock] || [];
+      getAllMock.mockResolvedValue(Object.fromEntries(providers.map((provider) => [provider.id, provider])));
+      getCurrentMock.mockResolvedValue(providers[0]?.id ?? "");
+      importDefaultMock.mockResolvedValue(false);
+      return {
+        data: {
+          providers: Object.fromEntries(
+            providers.map((provider) => [provider.id, provider]),
+          ),
+          currentProviderId: providers[0]?.id ?? "",
+        },
+        isLoading: false,
+        refetch: mockRefetch,
+      };
+    });
+  });
+
+  it("should render providers, open dialogs, and execute core flows", async () => {
+    const { container } = render(
+      <QueryClientProvider client={queryClient}>
+        <Suspense fallback={<div data-testid="loading">loading</div>}>
+          <AppComponent />
+        </Suspense>
+      </QueryClientProvider>,
+    );
+
+    // 初始加载后，应显示 ProviderList mock 渲染的 JSON
+    await waitFor(() =>
+      expect(screen.getByTestId("provider-list")).toBeInTheDocument(),
+    );
+    expect(screen.getByText("CC Switch")).toBeInTheDocument();
+
+    // 打开设置对话框并触发导入成功回调
+    fireEvent.click(screen.getByText("update-badge")); // open settings via badge
+    expect(screen.getByTestId("settings-dialog")).toBeInTheDocument();
+    fireEvent.click(screen.getByText("settings-on-import"));
+    await waitFor(() => expect(mockRefetch).toHaveBeenCalledTimes(1));
+    await waitFor(() => expect(updateTrayMenuMock).toHaveBeenCalledTimes(1));
+    fireEvent.click(screen.getByText("close-settings"));
+    expect(screen.queryByTestId("settings-dialog")).not.toBeInTheDocument();
+
+    // 切换到 codex 应用，确保 useProvidersQuery 被使用
+    fireEvent.click(screen.getByText("switch-app"));
+    await waitFor(() => {
+      expect(useProvidersQueryMock).toHaveBeenCalledWith("codex");
+    });
+
+    // 添加供应商流程
+    fireEvent.click(screen.getByText("header.addProvider"));
+    expect(screen.getByTestId("add-provider-dialog")).toBeInTheDocument();
+    fireEvent.click(screen.getByText("add-provider"));
+    expect(addProviderMock).toHaveBeenCalledWith({ name: "New Provider", appType: "codex" });
+    fireEvent.click(screen.getByText("close-add"));
+
+    // 编辑供应商流程
+    fireEvent.click(screen.getByText("edit"));
+    expect(screen.getByTestId("edit-provider-dialog")).toBeInTheDocument();
+    fireEvent.click(screen.getByText("save-edit"));
+    expect(updateProviderMock).toHaveBeenCalledWith({
+      id: "codex-1",
+      name: "undefined-edited",
+    });
+    fireEvent.click(screen.getByText("close-edit"));
+
+    // 删除供应商流程
+    fireEvent.click(screen.getByText("delete"));
+    expect(screen.getByTestId("confirm-dialog")).toBeInTheDocument();
+    fireEvent.click(screen.getByText("confirm-delete"));
+    expect(deleteProviderMock).toHaveBeenCalledWith("codex-1");
+
+    // 复制供应商流程（触发排序更新 + 添加）
+    fireEvent.click(screen.getByText("duplicate"));
+    await waitFor(() => {
+      expect(updateSortOrderMock).toHaveBeenCalled();
+    });
+    expect(addProviderMock).toHaveBeenCalledTimes(2);
+
+    // 使用脚本弹窗
+    fireEvent.click(screen.getByText("usage"));
+    expect(screen.getByTestId("usage-modal")).toBeInTheDocument();
+    fireEvent.click(screen.getByText("save-script"));
+    expect(saveUsageScriptMock).toHaveBeenCalledWith(
+      { id: "codex-1" },
+      "script-code",
+    );
+    fireEvent.click(screen.getByText("close-usage"));
+    expect(screen.queryByTestId("usage-modal")).not.toBeInTheDocument();
+
+    // 打开网站链接
+    fireEvent.click(screen.getByText("open-website"));
+    expect(openExternalMock).toHaveBeenCalledWith("https://example.com");
+
+    // 确保页面保留核心元素
+    expect(container.textContent).toContain("CC Switch");
+  });
+});