fix: restore coding history and quota feedback

tests/e2e/pi-coding-first-chat.spec.ts

@@ -143,6 +143,12 @@ async function installCodingFirstChatHost(
         : null,
       modelResolution: featureComplete ? 'resolved' : 'required',
     };
+    const historyConversation = {
+      ...conversation,
+      id: 'conversation-pi-history',
+      title: 'History and quota',
+      updatedAt: '2026-08-23T23:58:00.000Z',
+    };
     const snapshot = {
       schemaVersion: 1,
       conversation: {
@@ -353,6 +359,39 @@ async function installCodingFirstChatHost(
         error: { code: 'CODING_RUNTIME_START_FAILED', message: 'Worker stopped', recoverable: true },
       },
     };
+    const historySnapshot = {
+      ...snapshot,
+      conversation: {
+        ...snapshot.conversation,
+        id: historyConversation.id,
+        title: historyConversation.title,
+      },
+      nodes: [
+        ...Array.from({ length: 150 }, (_, index) => ({
+          kind: 'message',
+          id: `history-message-${index}`,
+          role: 'user',
+          status: 'complete',
+          blocks: [{
+            kind: 'text',
+            id: `history-message-${index}:content:0`,
+            text: `History message ${index}`,
+            status: 'complete',
+          }],
+        })),
+        {
+          kind: 'notice',
+          id: 'history-quota-notice',
+          code: 'CODING_PROVIDER_QUOTA_EXHAUSTED',
+          level: 'error',
+          message: '词元点数余额不足，请充值后重试。',
+        },
+      ],
+      run: { status: 'idle' },
+      queue: { items: [] },
+      pendingInteractions: [],
+      worker: { status: 'ready', generation: 1 },
+    };
     const respond = (json: unknown, status = 200) => ({
       ok: true,
       data: { status, ok: status >= 200 && status < 300, json },
@@ -453,7 +492,7 @@ async function installCodingFirstChatHost(
       if (path === `/api/coding/projects/conversations?projectId=${project.id}`) {
         return respond({
           conversations: featureComplete
-            ? [conversation, secondConversation]
+            ? [conversation, secondConversation, historyConversation]
             : state.conversationCreated
               ? [conversation]
               : [],
@@ -478,6 +517,9 @@ async function installCodingFirstChatHost(
       if (path === `/api/coding/conversations/${secondConversation.id}/snapshot`) {
         return respond({ snapshot: secondSnapshot });
       }
+      if (path === `/api/coding/conversations/${historyConversation.id}/snapshot`) {
+        return respond({ snapshot: historySnapshot });
+      }
       if (path === `/api/coding/conversations/${conversation.id}/prompt` && method === 'POST') {
         return respond({
           acceptance: {
@@ -890,6 +932,29 @@ test('PI feature UI isolates Conversations and exposes queue, interaction, model
     await expect(page.getByRole('textbox')).toHaveValue('');
     await page.getByRole('button', { name: '恢复' }).click();
 
+    await builderConversations.getByRole('button', { name: 'History and quota' }).click();
+    const historyProcess = page.getByTestId('coding-process-group');
+    await expect(historyProcess.locator('summary').first())
+      .toContainText('词元点数余额不足，请充值后重试。');
+    await expect(page.getByText('History message 0')).toHaveCount(0);
+    await expect(page.getByText('History message 31')).toHaveCount(1);
+    const historyTimeline = page.getByTestId('coding-conversation-timeline');
+    const beforeHeight = await historyTimeline.evaluate((element) => {
+      element.scrollTop = 0;
+      const height = element.scrollHeight;
+      element.dispatchEvent(new Event('scroll', { bubbles: true }));
+      return height;
+    });
+    await expect(page.getByText('History message 0')).toHaveCount(1);
+    const anchoredScroll = await historyTimeline.evaluate((element) => ({
+      scrollHeight: element.scrollHeight,
+      scrollTop: element.scrollTop,
+    }));
+    expect(anchoredScroll.scrollTop).toBeGreaterThan(0);
+    expect(Math.abs(
+      anchoredScroll.scrollTop - (anchoredScroll.scrollHeight - beforeHeight),
+    )).toBeLessThanOrEqual(2);
+
     await expect(page.getByText(/编程工具|分享|取消分享|回滚|恢复回滚|待办|全局运行时/)).toHaveCount(0);
     const state = await readState(electronApp);
     expect(state.captured.some((request) => request.path.endsWith('/model') && request.method === 'POST')).toBe(true);