feat: gitea-workspace now has file tree browser like local-workspace

- Main content area now shows file/folder tree with breadcrumb navigation
- Click folders to drill down, click files to open
- Breadcrumb shows current path with clickable segments
- Sorted tree: folders first, then files alphabetically
- refreshTree() now reloads without full page reload
- Empty state with 'New file' button when folder is empty

app/templates/gitea_workspace.html

@@ -88,20 +88,51 @@
     </div>
   </template>
 
-  <!-- Empty state -->
+  <!-- File tree browser (like local-workspace) -->
   <template x-if="!showFile && !showEditor && !showPrivate">
     <div class="gw-content">
-      <div class="empty-state">
-        <h2>📁 <span x-text="owner + '/' + repo"></span></h2>
-        <p x-show="!showNewFile">Select a file from the sidebar or create a new one</p>
-        <!-- New file form -->
-        <div x-show="showNewFile" style="margin-top:16px;text-align:left;max-width:400px;margin-left:auto;margin-right:auto;">
-          <input type="text" x-model="newFilePath" placeholder="path/to/file.md" class="settings-input" style="margin-bottom:8px;">
-          <textarea x-model="newFileContent" placeholder="File content..." class="settings-input" style="height:120px;margin-bottom:8px;"></textarea>
-          <input type="text" x-model="newFileMsg" placeholder="Commit message" class="settings-input" style="margin-bottom:8px;">
-          <button class="btn btn-primary" @click="createNewFile()">💾 Create file</button>
+      <!-- Breadcrumb -->
+      <div class="gw-breadcrumb" style="display:flex;align-items:center;gap:4px;margin-bottom:16px;font-size:14px;color:var(--text-secondary);">
+        <a href="#" @click.prevent="navigateToRoot()" style="color:var(--text-secondary);text-decoration:none;" x-text="owner + '/' + repo"></a>
+        <template x-for="(b, i) in folderStack" :key="i">
+          <span style="display:contents;">
+            <span style="color:var(--text-tertiary);">/</span>
+            <a href="#" @click.prevent="navigateToFolder(i)" style="color:var(--text-secondary);text-decoration:none;" x-text="b"></a>
+          </span>
+        </template>
+        <span x-show="treeLoading" style="color:var(--text-tertiary);">Loading...</span>
+      </div>
+
+      <!-- Tree items -->
+      <div x-show="!treeLoading">
+        <template x-if="treeItems.length === 0">
+          <div class="empty-state">
+            <h2>📁 Empty</h2>
+            <p>No files in this folder</p>
+            <button class="btn btn-primary" @click="showNewFile=!showNewFile">📄+ New file</button>
+          </div>
+        </template>
+
+        <div class="ws-tree">
+          <template x-for="item in sortedTreeItems" :key="item.path">
+            <div class="ws-tree-item"
+                 @click="item.type==='folder' ? drillDown(item.path) : openFile(item.path, item.sha)"
+                 style="display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:6px;cursor:pointer;">
+              <span x-text="item.type==='folder' ? '📁' : '📄'" style="font-size:16px;"></span>
+              <span x-text="item.name" style="flex:1;font-size:14px;" :style="{ fontWeight: item.type==='folder' ? '500' : '400' }"></span>
+              <span x-text="item.type==='folder' ? '' : formatSize(item.size)" style="font-size:12px;color:var(--text-tertiary);"></span>
+            </div>
+          </template>
         </div>
       </div>
+
+      <!-- New file form -->
+      <div x-show="showNewFile" style="margin-top:16px;max-width:400px;">
+        <input type="text" x-model="newFilePath" placeholder="path/to/file.md" class="settings-input" style="margin-bottom:8px;">
+        <textarea x-model="newFileContent" placeholder="File content..." class="settings-input" style="height:120px;margin-bottom:8px;"></textarea>
+        <input type="text" x-model="newFileMsg" placeholder="Commit message" class="settings-input" style="margin-bottom:8px;">
+        <button class="btn btn-primary" @click="createNewFile()">💾 Create file</button>
+      </div>
     </div>
   </template>
 
@@ -171,16 +202,61 @@ function giteaWorkspace() {
     editContent: '',
     commitMessage: 'Update via FlowDeck',
     commitHistory: JSON.parse(localStorage.getItem('fd_commit_msgs') || '[]'),
+    // File tree browser
+    treeItems: [],
+    treeLoading: false,
+    folderStack: [],
+    currentPath: '',
+
+    get sortedTreeItems() {
+      return [...this.treeItems].sort(function(a, b) {
+        if (a.type === b.type) return a.name.localeCompare(b.name);
+        return a.type === 'folder' ? -1 : 1;
+      });
+    },
 
     init() {
       // Set cookie for sidebar
       document.cookie = 'flowdeck_workspace=gitea:' + this.owner + ':' + this.repo + ';path=/;SameSite=Lax';
-      // Load root tree into sidebar
+      // Load sidebar tree
       this.loadSidebarTree();
+      // Load main content tree
+      this.loadMainTree('');
       // Listen for sidebar clicks on Gitea items
       this.setupSidebarClicks();
     },
 
+    async loadMainTree(path) {
+      this.treeLoading = true;
+      this.currentPath = path;
+      try {
+        var url = '/api/gitea/projects/' + this.owner + '/' + this.repo + '/tree';
+        if (path) url += '?path=' + encodeURIComponent(path);
+        var r = await fetch(url);
+        if (!r.ok) { this.treeItems = []; return; }
+        var d = await r.json();
+        this.treeItems = d.tree || [];
+      } catch(e) { this.treeItems = []; }
+      finally { this.treeLoading = false; }
+    },
+
+    drillDown(path) {
+      this.folderStack.push(path.split('/').pop());
+      this.loadMainTree(path);
+    },
+
+    navigateToFolder(idx) {
+      // Truncate stack and rebuild path
+      this.folderStack = this.folderStack.slice(0, idx + 1);
+      var path = this.folderStack.join('/');
+      this.loadMainTree(path);
+    },
+
+    navigateToRoot() {
+      this.folderStack = [];
+      this.loadMainTree('');
+    },
+
     async loadSidebarTree() {
       try {
         var r = await fetch('/api/gitea/projects/' + this.owner + '/' + this.repo + '/tree');
@@ -444,8 +520,9 @@ function giteaWorkspace() {
     },
 
     async refreshTree() {
-      // Reload page to refresh sidebar tree
-      window.location.reload();
+      // Reload main tree and sidebar tree without full page reload
+      this.loadMainTree(this.currentPath);
+      this.loadSidebarTree();
     },
 
     formatSize(bytes) {