Add install script for clone-first one-click deployment.

Prompt for repo URL and install directory, auto git clone, then run project setup. Keep deploy.py for in-repo updates only.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/deploy.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""LocalNav 一键部署：环境检测、生成 .env、安装依赖。"""
+"""LocalNav 项目内部署：环境检测、生成 .env、安装依赖（需已在项目目录内）。"""
 
 from __future__ import annotations
 
@@ -62,11 +62,14 @@ def check_pip(py_exe: str) -> None:
 
 
 def optional_tools() -> None:
-    for name in ("git", "pm2"):
-        if shutil.which(name):
-            _ok(f"可选工具 {name} 已安装")
-        else:
-            _warn(f"未检测到 {name}（可选）")
+    if shutil.which("git"):
+        _ok("可选工具 git 已安装")
+    else:
+        _warn("未检测到 git（可选，首次安装请用 scripts/install.py）")
+    if shutil.which("pm2"):
+        _ok("可选工具 pm2 已安装")
+    else:
+        _warn("未检测到 pm2（可选）")
 
 
 def read_env_lines(path: Path) -> list[str]:
@@ -199,7 +202,13 @@ def print_summary() -> None:
 
 
 def main() -> None:
-    print(f"LocalNav 一键部署 · {platform.system()} {platform.release()}")
+    if not (ROOT / "app.py").is_file():
+        _fail(
+            "请在 LocalNav 项目目录内运行，或使用 scripts/install.py 自动克隆安装：\n"
+            "  python scripts/install.py"
+        )
+
+    print(f"LocalNav 项目部署 · {platform.system()} {platform.release()}")
     print(f"项目目录: {ROOT}")
     print()