test: align packaged terminal smoke check

Author: txchen

tests/packaging-smoke.test.ts

@@ -122,7 +122,7 @@ async function expectPackedTerminal(command: string, args: string[], env: Record
 
   try {
     await waitFor(() => output.includes("Player") && output.includes("Library") && output.includes("Downloads"));
-    expect(output).toContain("prev · next");
+    expect(stripAnsi(output)).toContain("[ prev ] next");
     output = "";
     terminal.write("]");
     await waitFor(() => output.includes("▸ Library ◂"));
@@ -141,6 +141,10 @@ async function expectPackedTerminal(command: string, args: string[], env: Record
   }
 }
 
+function stripAnsi(value: string): string {
+  return value.replaceAll(/\x1b\[[0-?]*[ -/]*[@-~]/g, "");
+}
+
 async function withTimeout<T>(promise: Promise<T>, timeoutMs: number, message: string): Promise<T> {
   let timer: ReturnType<typeof setTimeout> | undefined;
   try {