fix: enable desktop window dragging

src/App.tsx

@@ -45,6 +45,7 @@ import { useGitHistory } from './hooks/useGitHistory'
 import { useUpdater, restartApp } from './hooks/useUpdater'
 import { useAutoSync } from './hooks/useAutoSync'
 import { useGuanghuTheme } from './hooks/useGuanghuTheme'
+import { useDragRegion } from './hooks/useDragRegion'
 import { useConflictResolver } from './hooks/useConflictResolver'
 import { useVaultConfig } from './hooks/useVaultConfig'
 import { useOnboarding } from './hooks/useOnboarding'
@@ -171,6 +172,7 @@ function MainApp({ noteWindowParams }: { noteWindowParams: NoteWindowParams | nu
   const aiWorkspaceWindow = false
   const [showHoloLakeHome, setShowHoloLakeHome] = useState(false)
   const { theme: guanghuTheme, cycleTheme } = useGuanghuTheme()
+  const { dragRegionRef } = useDragRegion<HTMLElement>()
   const [selection, setSelection] = useState<SidebarSelection>(DEFAULT_SELECTION)
   const [noteListFilter, setNoteListFilter] = useState<NoteListFilter>('open')
   const [pendingNoteListPdfExportPath, setPendingNoteListPdfExportPath] = useState<string | null>(null)
@@ -1627,7 +1629,7 @@ function MainApp({ noteWindowParams }: { noteWindowParams: NoteWindowParams | nu
   return (
     <AppPreferencesProvider dateDisplayFormat={dateDisplayFormat}>
       <div className="app-shell">
-        <header className="hololake-bar">
+        <header ref={dragRegionRef} className="hololake-bar" data-tauri-drag-region>
           <button className="hololake-bar__brand" onClick={() => setShowHoloLakeHome(true)}><img className="hololake-bar__mark" src={guanghuLogoLight} alt="光湖" /><span>HoloLake <b>Era</b></span></button>
           <span className="hololake-bar__line" />
           <span className="hololake-bar__context">光湖语言人格驱动操作系统</span>