fix: restore reliable update flow across sidebar and mobile

Show Update button in sidebar only when an update is available
Support update button on mobile sidebar and remove duplicate mobile Settings entry
Force desktop Tauri recheck and preflight before download to avoid missing pending updates

packages/ui/src/components/session/SessionSidebar.tsx

@@ -36,12 +36,14 @@ import { useSessionFolderCleanup } from './sidebar/hooks/useSessionFolderCleanup
 import { useStickyProjectHeaders } from './sidebar/hooks/useStickyProjectHeaders';
 import { useGitHubPrStatusStore } from '@/stores/useGitHubPrStatusStore';
 import { ProjectEditDialog } from '@/components/layout/ProjectEditDialog';
+import { UpdateDialog } from '@/components/ui/UpdateDialog';
 import { SessionGroupSection } from './sidebar/SessionGroupSection';
 import { SidebarHeader } from './sidebar/SidebarHeader';
 import { SidebarActivitySections } from './sidebar/SidebarActivitySections';
 import { SidebarFooter } from './sidebar/SidebarFooter';
 import { SidebarProjectsList } from './sidebar/SidebarProjectsList';
 import { SessionNodeItem } from './sidebar/SessionNodeItem';
+import { useUpdateStore } from '@/stores/useUpdateStore';
 import type { SortableDragHandleProps } from './sidebar/sortableItems';
 import {
   FolderDeleteConfirmDialog,
@@ -170,6 +172,7 @@ export const SessionSidebar: React.FC<SessionSidebarProps> = ({
   const [expandedSessionGroups, setExpandedSessionGroups] = React.useState<Set<string>>(new Set());
   const [hoveredProjectId, setHoveredProjectId] = React.useState<string | null>(null);
   const [newWorktreeDialogOpen, setNewWorktreeDialogOpen] = React.useState(false);
+  const [updateDialogOpen, setUpdateDialogOpen] = React.useState(false);
   const [projectNotesPanelOpen, setProjectNotesPanelOpen] = React.useState(false);
   const [openSidebarMenuKey, setOpenSidebarMenuKey] = React.useState<string | null>(null);
   const [renamingFolderId, setRenamingFolderId] = React.useState<string | null>(null);
@@ -315,6 +318,7 @@ export const SessionSidebar: React.FC<SessionSidebarProps> = ({
   const getSessionsByDirectory = useSessionStore((state) => state.getSessionsByDirectory);
   const openNewSessionDraft = useSessionStore((state) => state.openNewSessionDraft);
   const prStatusEntries = useGitHubPrStatusStore((state) => state.entries);
+  const updateStore = useUpdateStore();
 
   const tauriIpcAvailable = React.useMemo(() => isTauriShell(), []);
   const isDesktopShellRuntime = React.useMemo(() => isDesktopShell(), []);
@@ -585,6 +589,31 @@ export const SessionSidebar: React.FC<SessionSidebarProps> = ({
     setNewWorktreeDialogOpen(true);
   }, []);
 
+  const handleOpenUpdateDialog = React.useCallback(() => {
+    const current = useUpdateStore.getState();
+    if (current.available && current.info) {
+      setUpdateDialogOpen(true);
+      return;
+    }
+
+    void updateStore.checkForUpdates().then(() => {
+      const { available, error } = useUpdateStore.getState();
+      if (error) {
+        toast.error('Failed to check for updates', { description: error });
+        return;
+      }
+      if (!available) {
+        toast.success('You are on the latest version');
+        return;
+      }
+      setUpdateDialogOpen(true);
+    });
+  }, [updateStore]);
+
+  const showSidebarUpdateButton =
+    updateStore.available &&
+    (updateStore.runtimeType === 'desktop' || updateStore.runtimeType === 'web');
+
   const deleteSession = useSessionStore((state) => state.deleteSession);
   const deleteSessions = useSessionStore((state) => state.deleteSessions);
   const archiveSession = useSessionStore((state) => state.archiveSession);
@@ -1366,6 +1395,21 @@ export const SessionSidebar: React.FC<SessionSidebarProps> = ({
         onOpenSettings={() => setSettingsDialogOpen(true)}
         onOpenShortcuts={toggleHelpDialog}
         onOpenAbout={() => setAboutDialogOpen(true)}
+        onOpenUpdate={handleOpenUpdateDialog}
+        showUpdateButton={showSidebarUpdateButton}
+      />
+
+      <UpdateDialog
+        open={updateDialogOpen}
+        onOpenChange={setUpdateDialogOpen}
+        info={updateStore.info}
+        downloading={updateStore.downloading}
+        downloaded={updateStore.downloaded}
+        progress={updateStore.progress}
+        error={updateStore.error}
+        onDownload={updateStore.downloadUpdate}
+        onRestart={updateStore.restartToUpdate}
+        runtimeType={updateStore.runtimeType}
       />
 
       {editingProject ? (