feat: 全局文件选择器 + 项目管理路径选择按钮

- app.js新增window.pickPath(mode,callback)全局复用
- 项目管理「工作目录」+Git部署「目标目录」添加📁选择按钮
- Git部署不再硬编码data/projects,改用用户选择的目标目录
- files.js picker模式读取URL cb参数实现callback_id回传
- app.js版本号更新至v=0701

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

static/web_panel/js/app.js

@@ -172,6 +172,26 @@ async function loadPluginPage(pluginName) {
 }
 
 
+// ═══ Global file/dir picker (reusable by any page) ═══
+// Usage: pickPath('dir', function(path) { document.getElementById('my-input').value = path; })
+window.pickPath = function(mode, callback) {
+  var id = 'picker_' + Date.now();
+  window['_pickCallback_' + id] = callback;
+  var url = './static/pages/files.html?picker=1&mode=' + (mode || 'dir') + '&cb=' + id;
+  var w = window.open(url, 'fm-picker', 'width=680,height=520');
+  if (!w) { alert('请允许弹窗以使用文件选择器'); return; }
+  // Listen for pick result
+  window.addEventListener('message', function handler(e) {
+    try {
+      var d = JSON.parse(e.data);
+      if (d.action === 'fm-picked' && d.callback_id === id) {
+        window.removeEventListener('message', handler);
+        if (d.path && callback) callback(d.path);
+      }
+    } catch(ex) {}
+  });
+};
+
 // ═══ Sidebar toggle ═══
 function toggleSidebar() {
   document.getElementById('app').classList.toggle('collapsed');