feat: 拆分 archive 为纯提示词命令，新增 finish 执行目录归档

src/cli.ts

@@ -286,6 +286,19 @@ cli.command("archive <change-name>", "归档阶段").action(async (changeName: s
   }
   const config = await loadConfig(root);
   const prompt = await assembleArchivePrompt(config, root, changeName);
+  console.log(prompt);
+});
+
+cli.command("finish <change-name>", "归档变更").action(async (changeName: string) => {
+  validateChangeName(changeName);
+  const root = requireProjectRoot();
+  const changeDir = getChangeDir(root, changeName);
+  if (!existsSync(changeDir)) {
+    const prefix = getPmPrefix();
+    throw new CommandError(`变更 '${changeName}' 不存在`, {
+      hint: `请先运行 ${prefix} create ${changeName} 创建变更`,
+    });
+  }
   const today = new Date().toISOString().slice(0, 10);
   const dest = join(getArchiveDir(root), `${today}-${changeName}`);
   if (existsSync(dest)) {
@@ -294,7 +307,7 @@ cli.command("archive <change-name>", "归档阶段").action(async (changeName: s
     });
   }
   await rename(changeDir, dest);
-  console.log(prompt);
+  console.log(`变更 "${changeName}" 已归档到 .rune/archive/${today}-${changeName}`);
 });
 
 cli.command("status [change-name]", "查看变更状态").action(async (changeName?: string) => {