diff --git a/desktop/src/components/markdown/MarkdownRenderer.test.tsx b/desktop/src/components/markdown/MarkdownRenderer.test.tsx
index d794ca10..b47bd5b8 100644
--- a/desktop/src/components/markdown/MarkdownRenderer.test.tsx
+++ b/desktop/src/components/markdown/MarkdownRenderer.test.tsx
@@ -51,6 +51,22 @@ describe('MarkdownRenderer', () => {
     expect(screen.getByText('Body copy.')).toBeInTheDocument()
   })
 
+  it('applies compact prose classes for dense surfaces', () => {
+    const { container } = render(
+      <MarkdownRenderer
+        content={'**Done**\n\n- One\n- Two'}
+        variant="compact"
+      />,
+    )
+
+    const root = container.firstChild as HTMLDivElement
+    expect(root).toBeInTheDocument()
+    expect(root.className).toContain('prose-p:text-xs')
+    expect(root.className).toContain('prose-li:text-xs')
+    expect(screen.getByText('Done')).toBeInTheDocument()
+    expect(screen.getByText('One')).toBeInTheDocument()
+  })
+
   it('uses semantic code colors for inline code so both themes stay readable', () => {
     const { container } = render(
       <MarkdownRenderer content={'Use `claude-sonnet-4-6` for balanced speed.'} />,
diff --git a/desktop/src/components/markdown/MarkdownRenderer.tsx b/desktop/src/components/markdown/MarkdownRenderer.tsx
index 62b4ccc4..d9d0f236 100644
--- a/desktop/src/components/markdown/MarkdownRenderer.tsx
+++ b/desktop/src/components/markdown/MarkdownRenderer.tsx
@@ -6,7 +6,7 @@ import { MermaidRenderer } from '../chat/MermaidRenderer'
 
 type Props = {
   content: string
-  variant?: 'default' | 'document'
+  variant?: 'default' | 'document' | 'compact'
   className?: string
 }
 
@@ -136,8 +136,24 @@ const DOCUMENT_PROSE_CLASSES = `
   prose-li:my-1.5
   prose-table:my-0`
 
-function getProseClasses(variant: 'default' | 'document', className?: string) {
-  return [BASE_PROSE_CLASSES, variant === 'document' ? DOCUMENT_PROSE_CLASSES : '', className ?? '']
+const COMPACT_PROSE_CLASSES = `
+  prose-p:my-1 prose-p:text-xs prose-p:leading-5 prose-p:text-[var(--color-text-secondary)]
+  prose-headings:mt-2 prose-headings:mb-1 prose-headings:leading-snug
+  prose-h1:text-base prose-h2:text-sm prose-h3:text-xs prose-h4:text-xs
+  prose-blockquote:my-2 prose-blockquote:border-l-2 prose-blockquote:border-[var(--color-outline-variant)] prose-blockquote:pl-3 prose-blockquote:text-[var(--color-text-secondary)]
+  prose-code:text-[12px]
+  prose-ul:my-1 prose-ol:my-1 prose-ul:pl-4 prose-ol:pl-4
+  prose-li:my-0.5 prose-li:text-xs prose-li:leading-5 prose-li:text-[var(--color-text-secondary)]
+  prose-table:text-xs
+  [&_.md-table-wrap]:my-2`
+
+function getProseClasses(variant: 'default' | 'document' | 'compact', className?: string) {
+  return [
+    BASE_PROSE_CLASSES,
+    variant === 'document' ? DOCUMENT_PROSE_CLASSES : '',
+    variant === 'compact' ? COMPACT_PROSE_CLASSES : '',
+    className ?? '',
+  ]
     .filter(Boolean)
     .join(' ')
 }
diff --git a/desktop/src/components/tasks/TaskRunsPanel.test.tsx b/desktop/src/components/tasks/TaskRunsPanel.test.tsx
new file mode 100644
index 00000000..f0fd2d8c
--- /dev/null
+++ b/desktop/src/components/tasks/TaskRunsPanel.test.tsx
@@ -0,0 +1,47 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { cleanup, fireEvent, render, screen, waitFor } from '@testing-library/react'
+import '@testing-library/jest-dom'
+
+import { TaskRunsPanel } from './TaskRunsPanel'
+import { useSettingsStore } from '../../stores/settingsStore'
+import { useTaskStore } from '../../stores/taskStore'
+import type { TaskRun } from '../../types/task'
+
+afterEach(() => {
+  cleanup()
+  useSettingsStore.setState(useSettingsStore.getInitialState(), true)
+  useTaskStore.setState(useTaskStore.getInitialState(), true)
+})
+
+describe('TaskRunsPanel', () => {
+  it('renders scheduled task summaries as markdown', async () => {
+    const run: TaskRun = {
+      id: 'run-1',
+      taskId: 'task-1',
+      taskName: 'Daily summary',
+      startedAt: '2026-05-08T12:05:37.000Z',
+      status: 'completed',
+      prompt: 'Summarize recent commits',
+      output: '最近7天有3个commit，主要改动：\n\n**1. 2865d50 - UI无障碍改进**\n- 添加 theme-color meta 标签\n- 修复 select 标签问题',
+      durationMs: 12000,
+      sessionId: 'session-1',
+    }
+    useSettingsStore.setState({ locale: 'en' })
+    useTaskStore.setState({
+      fetchTaskRuns: vi.fn(async () => [run]),
+    } as Partial<ReturnType<typeof useTaskStore.getState>>)
+
+    const { container } = render(
+      <TaskRunsPanel taskId="task-1" onClose={vi.fn()} />,
+    )
+
+    await waitFor(() => expect(screen.getByRole('button', { name: 'Summary' })).toBeInTheDocument())
+    fireEvent.click(screen.getByRole('button', { name: 'Summary' }))
+
+    expect(screen.getByText('1. 2865d50 - UI无障碍改进')).toBeInTheDocument()
+    expect(container.querySelector('strong')).toHaveTextContent('1. 2865d50 - UI无障碍改进')
+    expect(screen.getByText('添加 theme-color meta 标签')).toBeInTheDocument()
+    expect(container.querySelector('li')).toHaveTextContent('添加 theme-color meta 标签')
+    expect(container.textContent).not.toContain('**1. 2865d50')
+  })
+})
diff --git a/desktop/src/components/tasks/TaskRunsPanel.tsx b/desktop/src/components/tasks/TaskRunsPanel.tsx
index 6f203087..172b0bbb 100644
--- a/desktop/src/components/tasks/TaskRunsPanel.tsx
+++ b/desktop/src/components/tasks/TaskRunsPanel.tsx
@@ -5,6 +5,7 @@ import { useTabStore } from '../../stores/tabStore'
 import { useTranslation } from '../../i18n'
 import { parseRunOutput } from '../../lib/parseRunOutput'
 import type { TaskRun } from '../../types/task'
+import { MarkdownRenderer } from '../markdown/MarkdownRenderer'
 
 function RunOutput({ run }: { run: TaskRun }) {
   const t = useTranslation()
@@ -28,10 +29,13 @@ function RunOutput({ run }: { run: TaskRun }) {
     )
   }
 
-  // Render AI text response with proper formatting (not monospace <pre>)
   return (
-    <div className="mt-2 p-2.5 rounded-[var(--radius-sm)] bg-[var(--color-surface-container)] text-xs text-[var(--color-text-secondary)] whitespace-pre-wrap break-words max-h-48 overflow-y-auto leading-relaxed">
-      {text}
+    <div className="mt-2 max-h-48 overflow-y-auto rounded-[var(--radius-sm)] bg-[var(--color-surface-container)] p-2.5">
+      <MarkdownRenderer
+        content={text}
+        variant="compact"
+        className="break-words"
+      />
     </div>
   )
 }