chore(release): prepare 3.16.4-5 wizard build

Bump the app and Tauri versions to 3.16.4-5 for the v3.16.4-5wizard release line. Add a regression assertion that the Codex MultiRouter wizard connectivity confirmation dialog renders at the top dialog layer z-[200].

Verification: pnpm typecheck; pnpm vitest run tests/lib/codexMultiRouterWizard.test.ts tests/components/CodexMultiRouterWizard.test.tsx tests/components/CodexFormFields.test.tsx; pnpm exec prettier --check package.json src-tauri/tauri.conf.json tests/components/CodexMultiRouterWizard.test.tsx; git diff --check.

Author: BigStrongSun

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cc-switch-multi",
-  "version": "3.16.4-4",
+  "version": "3.16.4-5",
   "description": "All-in-One Assistant for Claude Code, Codex & Gemini CLI",
   "type": "module",
   "scripts": {

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "CCSwitchMulti",
-  "version": "3.16.4-4",
+  "version": "3.16.4-5",
   "identifier": "com.ccswitchmulti.desktop",
   "build": {
     "frontendDist": "../dist",

tests/components/CodexMultiRouterWizard.test.tsx

@@ -376,6 +376,7 @@ describe("CodexMultiRouterWizard", () => {
       screen.getByRole("button", { name: "测试 Chat / Responses 连通性" }),
     );
     expect(screen.getByText("确认开始连通性测试")).toBeInTheDocument();
+    expect(screen.getByRole("dialog")).toHaveClass("z-[200]");
     fireEvent.click(screen.getByRole("button", { name: "确认测试" }));
 
     expect(