feat(gui-v2): add mobileOpen to useShellUiStore

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/app/src/stores/useShellUiStore.ts

@@ -17,6 +17,7 @@ export interface ShellDrawerState {
 
 export const useShellUiStore = defineStore('shellUi', () => {
   const sidebarCollapsed = ref(false)
+  const mobileOpen = ref(false)
   const density = ref<ShellDensity>('comfortable')
   const theme = ref<ShellTheme>('light')
   const drawer = ref<ShellDrawerState>({ isOpen: false, component: null, props: {} })
@@ -25,6 +26,10 @@ export const useShellUiStore = defineStore('shellUi', () => {
     sidebarCollapsed.value = !sidebarCollapsed.value
   }
 
+  function setMobileOpen(v: boolean): void {
+    mobileOpen.value = v
+  }
+
   function setTheme(next: ShellTheme): void {
     theme.value = next
   }
@@ -51,10 +56,12 @@ export const useShellUiStore = defineStore('shellUi', () => {
 
   return {
     sidebarCollapsed,
+    mobileOpen,
     density,
     theme,
     drawer,
     toggleSidebar,
+    setMobileOpen,
     setTheme,
     setDensity,
     applyDomAttributes,