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

frontend/src/routes/dashboards/[id]/+page.svelte

@@ -28,7 +28,9 @@
   import { t } from "$lib/i18n";
   import { api } from "$lib/api.js";
   import { gitService } from "../../../services/gitService";
-  import { openDrawerForTask } from "$lib/stores/taskDrawer.js";
+  import {
+    openDrawerForTaskIfPreferred,
+  } from "$lib/stores/taskDrawer.js";
   import { addToast } from "$lib/toasts.js";
   import Icon from "$lib/ui/Icon.svelte";
   import BranchSelector from "../../../components/git/BranchSelector.svelte";
@@ -169,7 +171,7 @@
       });
       const taskId = response?.task_id;
       if (taskId) {
-        openDrawerForTask(taskId);
+        openDrawerForTaskIfPreferred(taskId);
         addToast(
           $t.dashboard?.backup_started || "Backup task started",
           "success",
@@ -208,7 +210,7 @@
       });
       const taskId = response?.task_id || response?.id;
       if (taskId) {
-        openDrawerForTask(taskId);
+        openDrawerForTaskIfPreferred(taskId);
         addToast(
           $t.dashboard?.validation_started || "LLM validation started",
           "success",