test(cli): harden plan permission-mode sync wiring (#1182)

src/tests/cli/permission-mode-retry-wiring.test.ts

@@ -8,6 +8,27 @@ function readAppSource(): string {
 }
 
 describe("permission mode retry wiring", () => {
+  test("setUiPermissionMode syncs singleton mode immediately", () => {
+    const source = readAppSource();
+
+    const start = source.indexOf(
+      "const setUiPermissionMode = useCallback((mode: PermissionMode) => {",
+    );
+    const end = source.indexOf(
+      "const statusLineTriggerVersionRef = useRef(0);",
+    );
+    expect(start).toBeGreaterThan(-1);
+    expect(end).toBeGreaterThan(start);
+
+    const segment = source.slice(start, end);
+    expect(segment).toContain("if (permissionMode.getMode() !== mode)");
+    expect(segment).toContain(
+      'if (mode === "plan" && !permissionMode.getPlanFilePath())',
+    );
+    expect(segment).toContain("permissionMode.setPlanFilePath(planPath);");
+    expect(segment).toContain("permissionMode.setMode(mode);");
+  });
+
   test("pins submission permission mode and defines a restore helper", () => {
     const source = readAppSource();