fix: keep generation progress out of chat history

src/components/big-fish-creation/BigFishAgentWorkspace.interaction.test.tsx

@@ -103,3 +103,31 @@ test('big fish workspace hides keyword fill before two turns', () => {
 
   expect(screen.queryByRole('button', { name: '补充剩余设定' })).toBeNull();
 });
+
+test('big fish workspace does not render progress action messages as chat bubbles', () => {
+  render(
+    <BigFishAgentWorkspace
+      session={{
+        ...baseSession,
+        messages: [
+          ...baseSession.messages,
+          {
+            id: 'message-action-result-1',
+            role: 'assistant',
+            kind: 'action_result',
+            text: '本级主图已正式生成，可在结果页继续预览。',
+            createdAt: '2026-04-24T10:01:00.000Z',
+          },
+        ],
+      }}
+      onBack={() => {}}
+      onSubmitMessage={() => {}}
+      onExecuteAction={() => {}}
+    />,
+  );
+
+  expect(screen.getByText('爽点和生态已经清楚，继续补剩余关键词。')).toBeTruthy();
+  expect(
+    screen.queryByText('本级主图已正式生成，可在结果页继续预览。'),
+  ).toBeNull();
+});