feat: Implement user profile preferences for start page, Git identity, and task drawer auto-open, alongside Git server default branch configuration.

frontend/src/lib/components/layout/TopNavbar.svelte

@@ -40,6 +40,7 @@
     taskDrawerStore,
     openDrawerForTask,
     openDrawer,
+    setTaskDrawerAutoOpenPreference,
   } from "$lib/stores/taskDrawer.js";
   import { sidebarStore, toggleMobileSidebar } from "$lib/stores/sidebar.js";
   import { t } from "$lib/i18n";
@@ -112,6 +113,19 @@
     toggleAssistantChat();
   }
 
+  async function hydrateTaskDrawerPreference() {
+    try {
+      const response = await api.getProfilePreferences();
+      const autoOpenTaskDrawer = response?.preference?.auto_open_task_drawer;
+      setTaskDrawerAutoOpenPreference(autoOpenTaskDrawer !== false);
+    } catch (error) {
+      console.warn(
+        "[TopNavbar][REFLECT] Failed to hydrate task drawer preference, fallback to local preference cache",
+        error,
+      );
+    }
+  }
+
   function handleSearchFocus() {
     isSearchFocused = true;
     showSearchDropdown = groupedSearchResults.length > 0;
@@ -320,6 +334,7 @@
 
   onMount(() => {
     void initializeEnvironmentContext();
+    void hydrateTaskDrawerPreference();
     if (typeof document !== "undefined") {
       document.addEventListener("click", handleDocumentClick);
     }