feat: 完善群聊日报语音转写缓存

支持空内容的微信语音消息并兼容历史缓存转写结果
将系统通知标记为微信系统消息，排除活跃成员与发言排行

tests/unit/group-report.test.ts

@@ -1,6 +1,11 @@
 import { describe, expect, it } from 'vitest'
-import { parseGroupDailyReport } from '../../src/renderer/src/utils/group-report'
+import {
+  buildGroupReportInput,
+  parseGroupDailyReport
+} from '../../src/renderer/src/utils/group-report'
 import { summaryContent } from '../../src/renderer/src/utils/group-report-facts'
+import { summarySender } from '../../src/renderer/src/utils/group-report-facts'
+import { selectHeroParticipantNames } from '../../src/shared/group-report'
 import type { GroupReportMetadata } from '../../src/shared/group-report'
 import type { Message } from '../../src/shared/types'
 
@@ -25,6 +30,12 @@ const media = {
 }
 
 describe('group report parsing', () => {
+  it('keeps only distinct real participants in the hero avatar list', () => {
+    expect(
+      selectHeroParticipantNames(['濑岛田井卫', '测试群昵称', '濑岛田井卫', '', '  '])
+    ).toEqual(['濑岛田井卫', '测试群昵称'])
+  })
+
   it('includes a cached voice transcript in the report input content', () => {
     const message: Message = {
       id: 'voice-1',
@@ -40,6 +51,68 @@ describe('group report parsing', () => {
     expect(summaryContent(message)).toContain('今晚八点确认发布。')
   })
 
+  it('includes a voice transcript when legacy cached messages have no contentData', () => {
+    const message: Message = {
+      id: 'voice-legacy',
+      from: 'member',
+      type: '语音',
+      datetime: '2026-08-11 10:00:00',
+      content: '[语音消息]',
+      isSender: false,
+      voiceTranscript: '能不能听见这个语音？'
+    }
+
+    expect(summaryContent(message)).toBe('[语音] 能不能听见这个语音？')
+  })
+
+  it('passes legacy voice transcripts into the daily-report model prompt', async () => {
+    const message: Message = {
+      id: 'voice-prompt',
+      from: 'member',
+      type: '语音',
+      datetime: '2026-08-11 10:00:00',
+      content: '[语音消息]',
+      isSender: false,
+      name: '测试成员',
+      voiceTranscript: '试一下好不好使？'
+    }
+
+    const input = await buildGroupReportInput([message], null, true, 'full')
+
+    expect(input.prompt).toContain('[语音] 试一下好不好使？')
+  })
+
+  it('labels system notices separately and excludes them from active members', async () => {
+    const systemMessage: Message = {
+      id: 'system-1',
+      from: 'system',
+      type: '系统消息',
+      datetime: '2026-08-11 09:59:00',
+      content: '由于账号安全原因，无法加入当前群聊。',
+      isSender: false,
+      contentData: {
+        type: 'system',
+        content: '由于账号安全原因，无法加入当前群聊。'
+      }
+    }
+    const memberMessage: Message = {
+      id: 'member-1',
+      from: 'member',
+      type: '普通文本',
+      datetime: '2026-08-11 10:00:00',
+      content: '收到',
+      name: '测试成员',
+      isSender: false
+    }
+
+    expect(summarySender(systemMessage, null, true)).toBe('微信系统消息')
+    const input = await buildGroupReportInput([systemMessage, memberMessage], null, true, 'full')
+
+    expect(input.metadata.activeUsers).toBe(1)
+    expect(input.topSpeakers).toEqual([{ name: '测试成员', count: 1 }])
+    expect(input.prompt).toContain('微信系统消息：由于账号安全原因，无法加入当前群聊。')
+  })
+
   it('falls back to topic keywords when the model omits top-level keywords', () => {
     const report = parseGroupDailyReport(
       JSON.stringify({