fix(ui): add 'Press Enter to return' pause after subcommand completes

After a subcommand returns (especially 'Nothing to commit' cases), the
menu no longer immediately redraws and hides the message. Instead, the
user sees the subcommand output plus a 'Press Enter to return to menu'
prompt, giving them time to read the result before returning.

index.ts

@@ -130,6 +130,33 @@ async function dispatchMenuAction(key: string): Promise<number> {
   }
 }
 
+async function waitForEnter(): Promise<void> {
+  const D = DIM();
+  const R = RESET();
+  process.stdout.write(`\n  ${D}Press Enter to return to menu...${R}`);
+  // Read a line from stdin (works in cooked mode — blocks until Enter)
+  await new Promise<void>((resolve) => {
+    const onData = (data: Buffer) => {
+      process.stdin.removeListener("data", onData);
+      resolve();
+    };
+    process.stdin.on("data", onData);
+    // Resume stdin in case it was paused
+    process.stdin.resume();
+  });
+  process.stdout.write("\x1b[2J\x1b[H"); // clear screen
+}
+
+async function dispatchAndWait(item: MenuItem, wasRaw: boolean): Promise<number> {
+  showCursor();
+  process.stdin.setRawMode(wasRaw === true);
+  process.stdin.pause();
+  process.stdout.write("\x1b[2J\x1b[H"); // clear screen
+  const result = await dispatchMenuAction(item.key);
+  await waitForEnter();
+  return result;
+}
+
 async function showMenu(): Promise<number> {
   if (!isStdinTTY()) {
     console.error("Error: Interactive menu requires a TTY. Use --help for usage.");
@@ -163,14 +190,8 @@ async function showMenu(): Promise<number> {
 
       // Enter
       if (raw === "\r" || raw === "\n") {
-        const item = MENU_ITEMS[cursor]!;
-        showCursor();
-        process.stdin.setRawMode(wasRaw === true);
-        process.stdin.pause();
-        process.stdout.write("\x1b[2J\x1b[H"); // clear screen
-        const result = await dispatchMenuAction(item.key);
+        const result = await dispatchAndWait(MENU_ITEMS[cursor]!, wasRaw);
         if (result !== 0) return result;
-        // Return to menu
         hideCursor();
         if (wasRaw !== true) process.stdin.setRawMode(true);
         process.stdin.resume();
@@ -193,12 +214,7 @@ async function showMenu(): Promise<number> {
         if (idx < MENU_ITEMS.length) {
           cursor = idx;
           renderMenu(banner, cursor);
-          const item = MENU_ITEMS[idx]!;
-          showCursor();
-          process.stdin.setRawMode(wasRaw === true);
-          process.stdin.pause();
-          process.stdout.write("\x1b[2J\x1b[H"); // clear screen
-          const result = await dispatchMenuAction(item.key);
+          const result = await dispatchAndWait(MENU_ITEMS[idx]!, wasRaw);
           if (result !== 0) return result;
           hideCursor();
           if (wasRaw !== true) process.stdin.setRawMode(true);