完善客户端模块与工作区能力

src/components/layout/MainLayout.tsx

@@ -85,11 +85,12 @@ export function MainLayout() {
 
   const initializationBlocked = Boolean(activeProject && (!config || !config.initialized) && !isInitializationSafeRoute);
   return (
-    <div data-testid="main-layout" className="flex h-screen flex-col overflow-hidden bg-transparent">
+    <div data-testid="main-layout" className="relative flex h-[100dvh] flex-col overflow-hidden bg-transparent font-sans">
       {/* Title bar: drag region on macOS, icon + controls on Windows */}
       <TitleBar
         integrated
         workspaceLayout={isChatWorkspace}
+        overlay={isPaintingModule}
         sidebarPeekOpen={sidebarPeekOpen}
         onSidebarPeekChange={handleSidebarPeekChange}
       />
@@ -104,8 +105,9 @@ export function MainLayout() {
         <main
           data-testid="main-content"
           className={cn(
-            'relative min-h-0 min-w-0 flex-1 overflow-auto bg-background p-5 sm:p-6',
-            isChatWorkspace && 'basis-0 overflow-hidden p-0',
+            'relative min-h-0 min-w-0 flex-1 overflow-auto bg-background',
+            isPaintingModule ? 'basis-0 h-full overflow-hidden p-0' : 'p-5 sm:p-6',
+            isChatWorkspace && !isPaintingModule && 'basis-0 overflow-hidden p-0',
           )}
         >
           <Outlet />