收口智能创作工作台空消息

creative-agent 工作台空消息改用 PlatformEmptyState 承接共享空态外观
更新工作台空消息测试断言与收口计划文档记录
补充 Hermes 验证说明保持后续收口路径一致

src/components/creative-agent/CreativeAgentWorkspace.test.tsx

@@ -288,7 +288,7 @@ test('switching creative session clears pending template config dialog', () => {
   expect(screen.queryByRole('dialog', { name: '确认拼图模板' })).toBeNull();
 });
 
-test('creative agent empty workspace uses platform subpanels', () => {
+test('creative agent empty workspace uses shared empty state chrome', () => {
   render(
     <CreativeAgentWorkspace
       session={createSession({
@@ -312,7 +312,7 @@ test('creative agent empty workspace uses platform subpanels', () => {
     .closest('div');
   const processPanel = screen.getByText('等待新的创作输入').closest('section');
 
-  expect(emptyMessagePanel?.className).toContain('platform-subpanel');
+  expect(emptyMessagePanel?.className).toContain('platform-empty-state');
   expect(emptyMessagePanel?.className).toContain('rounded-[1.35rem]');
   expect(processPanel?.className).toContain('platform-subpanel');
   expect(processPanel?.className).toContain('rounded-[1.35rem]');

src/components/creative-agent/CreativeAgentWorkspace.tsx

@@ -11,6 +11,7 @@ import type {
   PuzzleCreativeTemplateSelection,
 } from '../../../packages/shared/src/contracts/puzzleCreativeTemplate';
 import { PlatformActionButton } from '../common/PlatformActionButton';
+import { PlatformEmptyState } from '../common/PlatformEmptyState';
 import { PlatformIconBadge } from '../common/PlatformIconBadge';
 import { PlatformMediaFrame } from '../common/PlatformMediaFrame';
 import { PlatformPillBadge } from '../common/PlatformPillBadge';
@@ -236,13 +237,13 @@ export function CreativeAgentWorkspace({
               ))}
             </div>
           ) : (
-            <PlatformSubpanel
-              as="div"
-              radius="lg"
-              className="text-sm font-semibold text-[var(--platform-text-base)]"
+            <PlatformEmptyState
+              surface="subpanel"
+              size="compact"
+              className="rounded-[1.35rem] font-semibold"
             >
               发一句想法，或加一张参考图。
-            </PlatformSubpanel>
+            </PlatformEmptyState>
           )}
 
           <CreativeAgentProcessPanel