refactor(cli): show empty state prompt in current page

Empty commit/PR states no longer auto-return to the menu. Instead, the
user is shown an in-page prompt with a Back option, mirroring the rest
of the CLI: pressing Enter on Back (or ←/backspace) closes the prompt
and returns control to the previous step.

index.ts

@@ -611,14 +611,11 @@ async function showMenu(): Promise<void> {
 
     if (selected === null || selected === BACK) return;
 
-    const result =
+    if (selected === "commit") await handleCommit(false, false);
-      selected === "commit"
+    else if (selected === "pr") await handlePR(false);
-        ? await handleCommit(false, false)
+    else await handleConfig();
-        : selected === "pr"
-          ? await handlePR(false)
-          : await handleConfig();
 
-    if (result !== "back") return;
+    return;
   }
 }
 
@@ -663,8 +660,9 @@ async function handleCommit(
   const unstagedFiles = await getUnstagedFiles();
 
   if (stagedFiles.length === 0 && unstagedFiles.length === 0) {
-    console.log("  Nothing to commit.");
+    console.log(`\n  ${YELLOW}Nothing to commit.${RESET}`);
-    return "done";
+    await ask(`  ${DIM}Press Enter to exit...${RESET}`);
+    process.exit(0);
   }
 
   if (unstagedFiles.length > 0) {
@@ -687,8 +685,9 @@ async function handleCommit(
 
   const diff = await getStagedDiff();
   if (!diff) {
-    console.log("  No staged changes to commit.");
+    console.log(`\n  ${YELLOW}No staged changes to commit.${RESET}`);
-    return "done";
+    await ask(`  ${DIM}Press Enter to exit...${RESET}`);
+    process.exit(0);
   }
 
   const MAX_DIFF_SIZE = 15000;
@@ -817,9 +816,10 @@ async function handlePR(draft: boolean): Promise<"done" | "back"> {
 
   if (commits.length === 0) {
     console.error(
-      `  ${RED}Error: No commits on ${branchName} compared to ${baseBranch}. Commit something first.${RESET}`,
+      `\n  ${YELLOW}No commits on ${branchName} compared to ${baseBranch}. Commit something first.${RESET}`,
     );
-    process.exit(1);
+    await ask(`  ${DIM}Press Enter to exit...${RESET}`);
+    process.exit(0);
   }
 
   console.log(