feat: enhance CLI discussion agent and multi-CLI planning with JSON string support; improve error handling and internationalization

ccw/src/templates/dashboard-css/21-cli-toolmgmt.css

@@ -746,8 +746,7 @@
 }
 
 .file-browser-loading,
-.file-browser-empty,
-.file-browser-error {
+.file-browser-empty {
   display: flex;
   align-items: center;
   justify-content: center;
@@ -758,9 +757,28 @@
 }
 
 .file-browser-error {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  min-height: 200px;
+  font-size: 0.875rem;
+  text-align: center;
+  padding: 1rem;
+  gap: 0.5rem;
+}
+
+.file-browser-error p {
+  margin: 0;
   color: hsl(var(--destructive));
 }
 
+.file-browser-hint {
+  color: hsl(var(--muted-foreground));
+  font-size: 0.8rem;
+}
+
 .file-browser-item {
   display: flex;
   align-items: center;

ccw/src/templates/dashboard-js/i18n.js

@@ -278,6 +278,8 @@ const i18n = {
     'cli.fileBrowserUp': 'Parent Directory',
     'cli.fileBrowserHome': 'Home',
     'cli.fileBrowserShowHidden': 'Show hidden files',
+    'cli.fileBrowserApiError': 'Server restart required to enable file browser',
+    'cli.fileBrowserManualHint': 'Type the full path above and click Select (e.g., C:\\Users\\name\\.gemini)',
 
     // CodexLens Configuration
     'codexlens.config': 'CodexLens Configuration',
@@ -2517,6 +2519,8 @@ const i18n = {
     'cli.fileBrowserUp': '上级目录',
     'cli.fileBrowserHome': '主目录',
     'cli.fileBrowserShowHidden': '显示隐藏文件',
+    'cli.fileBrowserApiError': '需要重启服务器以启用文件浏览器',
+    'cli.fileBrowserManualHint': '请在上方输入完整路径后点击选择（如 C:\\Users\\用户名\\.gemini）',
 
     // CodexLens 配置
     'codexlens.config': 'CodexLens 配置',

ccw/src/templates/dashboard-js/views/cli-manager.js

@@ -659,7 +659,17 @@ async function loadFileBrowserDirectory(path) {
   } catch (err) {
     console.error('Failed to load directory:', err);
     if (listContainer) {
-      listContainer.innerHTML = '<div class="file-browser-error">Failed to load directory</div>';
+      listContainer.innerHTML = '<div class="file-browser-error">' +
+        '<p>' + t('cli.fileBrowserApiError') + '</p>' +
+        '<p class="file-browser-hint">' + t('cli.fileBrowserManualHint') + '</p>' +
+      '</div>';
+    }
+    // Enable manual path entry mode - enable select button when path is typed
+    var selectBtn = document.getElementById('fileBrowserSelectBtn');
+    var pathInput = document.getElementById('fileBrowserPathInput');
+    if (selectBtn && pathInput) {
+      selectBtn.disabled = false;
+      pathInput.focus();
     }
   }
 }
@@ -744,8 +754,17 @@ function initFileBrowserEvents() {
   var selectBtn = document.getElementById('fileBrowserSelectBtn');
   if (selectBtn) {
     selectBtn.onclick = function() {
+      // First try selected path from list, then fall back to path input
       var path = selectBtn.getAttribute('data-selected-path');
-      closeFileBrowserModal(path);
+      if (!path) {
+        var pathInput = document.getElementById('fileBrowserPathInput');
+        if (pathInput && pathInput.value.trim()) {
+          path = pathInput.value.trim();
+        }
+      }
+      if (path) {
+        closeFileBrowserModal(path);
+      }
     };
   }