fix: sidebar Gitea tree loading — race condition + silent errors + wrong Alpine scope

- loadGiteaTree: skip if giteaWorkspace component already loaded tree
- loadGiteaTree: check r.ok, add console.error logging, show error in UI
- loadGiteaTree: use .bind(this) for correct this in callbacks
- gitea_workspace.html: replace querySelector('[x-data]') with captured self
  in loadSidebarTree, loadSubdir, Private Pages click handlers
- Prevents loadGiteaTree from overwriting loadSidebarTree results
  on /gitea-workspace page

app/main.py

@@ -42,7 +42,7 @@ async def lifespan(_app: FastAPI):
 
 app = FastAPI(
     title="FlowDeck",
-    version="2.4.6",
+    version="patch",
     docs_url="/docs" if settings.log_level == "DEBUG" else None,
     redoc_url=None,
     lifespan=lifespan,