fix: remove getter from giteaWorkspace() to fix Alpine 3.14.9 init error

The 'get sortedTreeItems()' getter caused Alpine's Proxy to fail during
component initialization, resulting in all properties being undefined
(fileLoading, fileLanguage, showFile, etc. — Uncaught ReferenceError).

Fix:
- Replaced getter with _sortTree() method + sortedTreeItems property
- _sortTree() called after treeItems is updated in loadMainTree()
- sortedTreeItems explicitly set to [] on error/empty paths

app/templates/gitea_workspace.html

@@ -215,14 +215,15 @@ function giteaWorkspace() {
     commitHistory: JSON.parse(localStorage.getItem('fd_commit_msgs') || '[]'),
     // File tree browser
     treeItems: [],
+    sortedTreeItems: [],
     treeLoading: false,
     folderStack: [],
     currentPath: '',
     // Context menu
     gwCtx: { visible: false, x: 0, y: 0, item: null },
 
-    get sortedTreeItems() {
-      return [...this.treeItems].sort(function(a, b) {
+    _sortTree() {
+      this.sortedTreeItems = [...this.treeItems].sort(function(a, b) {
         if (a.type === b.type) return a.name.localeCompare(b.name);
         return a.type === 'folder' ? -1 : 1;
       });
@@ -248,10 +249,11 @@ function giteaWorkspace() {
         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; }
+        if (!r.ok) { this.treeItems = []; this.sortedTreeItems = []; return; }
         var d = await r.json();
         this.treeItems = d.tree || [];
-      } catch(e) { this.treeItems = []; }
+        this._sortTree();
+      } catch(e) { this.treeItems = []; this.sortedTreeItems = []; }
       finally { this.treeLoading = false; }
     },