fix(i18n): localize backend errors, reactive plugin UI, bilingual tags, and eyebrows

backend/app/agendas/outcome_tags.py

@@ -66,13 +66,13 @@ def parse_action_metadata(
                 due_date_val = date.fromisoformat(token)
             except ValueError:
                 break
-        elif token_lower in ("todo", "open"):
+        elif token_lower in ("todo", "open", "待办", "待开始"):
             status = ActionStatus.open
-        elif token_lower in ("in_progress", "doing", "progress"):
+        elif token_lower in ("in_progress", "doing", "progress", "进行中"):
             status = ActionStatus.in_progress
-        elif token_lower in ("done", "completed", "finish", "finished"):
+        elif token_lower in ("done", "completed", "finish", "finished", "已完成", "完成"):
             status = ActionStatus.done
-        elif token_lower in ("canceled", "cancelled"):
+        elif token_lower in ("canceled", "cancelled", "已取消", "取消"):
             status = ActionStatus.canceled
         else:
             break

backend/tests/domain/test_bidirectional_actions.py

@@ -84,6 +84,40 @@ def test_parse_outcome_tags_extended_syntax():
     assert actions[3].content == "传统无括号待办"
 
 
+def test_parse_outcome_tags_chinese_status_tokens():
+    md = """
+@行动:[待办][@林宇][2026-10-01] 整理压测报告
+@行动:[待开始][@乔安] 准备回滚预案
+@行动:[进行中][@林宇] 推进网关限流改造
+@行动:[已完成][@乔安][2026-09-30] 完成发布清单核验
+@行动:[已取消] 旧版接口迁移计划
+"""
+    tags = parse_outcome_tags(md)
+    assert len(tags) == 5
+
+    assert tags[0].status == ActionStatus.open
+    assert tags[0].owner_name == "林宇"
+    assert tags[0].due_date == date(2026, 10, 1)
+    assert tags[0].content == "整理压测报告"
+
+    assert tags[1].status == ActionStatus.open
+    assert tags[1].owner_name == "乔安"
+    assert tags[1].content == "准备回滚预案"
+
+    assert tags[2].status == ActionStatus.in_progress
+    assert tags[2].owner_name == "林宇"
+    assert tags[2].content == "推进网关限流改造"
+
+    assert tags[3].status == ActionStatus.done
+    assert tags[3].owner_name == "乔安"
+    assert tags[3].due_date == date(2026, 9, 30)
+    assert tags[3].content == "完成发布清单核验"
+
+    assert tags[4].status == ActionStatus.canceled
+    assert tags[4].owner_name is None
+    assert tags[4].content == "旧版接口迁移计划"
+
+
 def test_rewrite_action_in_notes():
     notes = """# Notes
 - List item

frontend/src/api/client.ts

@@ -1,4 +1,5 @@
 import { locale } from '../i18n'
+import { translateBackendError } from '../utils/errors'
 
 export class ApiError extends Error {
   constructor(
@@ -25,7 +26,12 @@ export function apiErrorMessage(
     && 'message' in payload.error
     && typeof payload.error.message === 'string'
   ) {
-    return payload.error.message
+    const code = 'code' in payload.error && typeof payload.error.code === 'string' ? payload.error.code : null
+    const translated = translateBackendError(payload.error.message, code)
+    if (locale.value === 'en' && /[\u4e00-\u9fff]/.test(translated) && !/[\u4e00-\u9fff]/.test(fallback)) {
+      return fallback
+    }
+    return translated
   }
   return fallback
 }

frontend/src/api/plugin-stream.ts

@@ -1,4 +1,5 @@
 import { locale } from '../i18n'
+import { translateBackendError } from '../utils/errors'
 import { apiErrorMessage, dispatchAuthExpired } from './client'
 
 function consumeEvent(block: string, onDelta: (text: string) => void): boolean {
@@ -24,7 +25,8 @@ function consumeEvent(block: string, onDelta: (text: string) => void): boolean {
   }
   if (event === 'error') {
     if (payload && typeof payload === 'object' && 'message' in payload && typeof payload.message === 'string') {
-      throw new Error(payload.message)
+      const code = 'code' in payload && typeof payload.code === 'string' ? payload.code : null
+      throw new Error(translateBackendError(payload.message, code))
     }
     throw new Error(locale.value === 'en' ? 'Failed to generate AI work brief, please try again later' : 'AI 工作简报生成失败，请稍后重试')
   }

frontend/src/components/AgendaDetail.vue

@@ -479,7 +479,7 @@ const noteActionTags = computed(() => {
 <template>
   <div class="agenda-detail" data-testid="agenda-detail">
     <header class="agenda-detail-header">
-      <div><p class="eyebrow">Current topic</p><input v-model="draft.title" class="agenda-title-input" :aria-label="tr('议题标题', 'Agenda Title')" :readonly="!canContribute" /></div>
+      <div><p class="eyebrow">{{ tr('当前议题', 'Current topic') }}</p><input v-model="draft.title" class="agenda-title-input" :aria-label="tr('议题标题', 'Agenda Title')" :readonly="!canContribute" /></div>
       <div class="agenda-detail-status">
         <StatusPill :status="props.item.status" kind="agenda" />
         <n-tag v-if="item.carry_from_open_question_id" size="small" :bordered="false">{{ tr('来自开放问题', 'From Question') }}</n-tag>
@@ -532,7 +532,7 @@ const noteActionTags = computed(() => {
       <n-button v-if="canCopy" quaternary size="small" @click="openCopy">{{ tr('复制到其他会议', 'Copy to Meeting') }}</n-button>
     </div>
 
-    <section class="agenda-outcomes"><header class="section-heading"><div><p class="eyebrow">Outcomes</p><h2>{{ tr('本议题产出', 'Topic Outcomes') }}</h2></div><div v-if="canContribute" class="outcome-action-group" data-testid="outcome-actions"><button class="button button-small button-quiet" @click="composer = 'decision'">{{ tr('+ 决策', '+ Decision') }}</button><button class="button button-small button-quiet" @click="composer = 'action'">{{ tr('+ 行动', '+ Action') }}</button><button class="button button-small button-quiet" @click="composer = 'question'">{{ tr('+ 开放问题', '+ Question') }}</button></div></header>
+    <section class="agenda-outcomes"><header class="section-heading"><div><p class="eyebrow">{{ tr('议题产出', 'Outcomes') }}</p><h2>{{ tr('本议题产出', 'Topic Outcomes') }}</h2></div><div v-if="canContribute" class="outcome-action-group" data-testid="outcome-actions"><button class="button button-small button-quiet" @click="composer = 'decision'">{{ tr('+ 决策', '+ Decision') }}</button><button class="button button-small button-quiet" @click="composer = 'action'">{{ tr('+ 行动', '+ Action') }}</button><button class="button button-small button-quiet" @click="composer = 'question'">{{ tr('+ 开放问题', '+ Question') }}</button></div></header>
       <OutcomeComposer v-if="canContribute && composer" :mode="composer" :meeting="meeting" :item="item" @close="composer = null" @saved="emit('changed')" />
       <div class="outcome-list">
         <article
@@ -603,7 +603,7 @@ const noteActionTags = computed(() => {
     </section>
 
     <section class="agenda-attachments" data-testid="agenda-attachments">
-      <header class="section-heading"><div><p class="eyebrow">Attachments</p><h2>{{ tr('议题附件', 'Attachments') }}</h2></div></header>
+      <header class="section-heading"><div><p class="eyebrow">{{ tr('相关附件', 'Attachments') }}</p><h2>{{ tr('议题附件', 'Attachments') }}</h2></div></header>
       <AttachmentPanel target-type="agenda_item" :target-id="item.id" :attachments="attachments" :can-contribute="canContribute" @uploaded="onAttachmentUploaded" @deleted="onAttachmentDeleted" />
     </section>
 

frontend/src/components/AgendaQueue.vue

@@ -242,7 +242,7 @@ function onMenuSelect(item: AgendaItem, key: string) {
 
 <template>
   <aside class="agenda-queue" data-testid="agenda-queue">
-    <header class="section-heading"><div><p class="eyebrow">Agenda</p><h2>{{ tr('议题队列', 'Agenda Queue') }}</h2></div><button v-if="canContribute" class="button button-small button-primary" @click="adding = !adding">{{ adding ? tr('收起', 'Close') : tr('+ 议题', '+ Agenda') }}</button></header>
+    <header class="section-heading"><div><p class="eyebrow">{{ tr('议程编排', 'Agenda') }}</p><h2>{{ tr('议题队列', 'Agenda Queue') }}</h2></div><button v-if="canContribute" class="button button-small button-primary" @click="adding = !adding">{{ adding ? tr('收起', 'Close') : tr('+ 议题', '+ Agenda') }}</button></header>
     <form v-if="canContribute && adding" class="agenda-add-form" @submit.prevent="addAgenda">
       <label>{{ tr('议题标题', 'Agenda Title') }}<input v-model="title" required /></label>
       <label>{{ tr('类型', 'Type') }}<select v-model="agendaType"><option value="information">{{ tr('信息同步', 'Info Sync') }}</option><option value="discussion">{{ tr('讨论', 'Discussion') }}</option><option value="decision">{{ tr('决策', 'Decision') }}</option></select></label>

frontend/src/components/AgendaWorkbench.vue

@@ -69,7 +69,7 @@ defineExpose({ flushCurrentDraft })
     <Transition name="agenda-detail" mode="out-in">
       <AgendaDetail v-if="selected" :key="selected.id" ref="detail" :meeting="meeting" :item="selected" :can-contribute="canContribute" @changed="emit('reload')" @advance="advance" />
       <div v-else class="agenda-empty-compact" data-testid="agenda-detail">
-        <div><p class="eyebrow">Current topic</p><h2>{{ tr('还没有议题', 'No agenda items yet') }}</h2><p>{{ tr('从右侧队列添加本次会议的第一个议题。', 'Add the first agenda item for this meeting from the queue on the right.') }}</p></div>
+        <div><p class="eyebrow">{{ tr('当前议题', 'Current topic') }}</p><h2>{{ tr('还没有议题', 'No agenda items yet') }}</h2><p>{{ tr('从右侧队列添加本次会议的第一个议题。', 'Add the first agenda item for this meeting from the queue on the right.') }}</p></div>
       </div>
     </Transition>
     <AgendaQueue :meeting="meeting" :can-contribute="canContribute" :selected-id="selectedId" :opening-id="openingId" :open-error="openError" @select="openAgenda" @changed="emit('reload')" />

frontend/src/components/CompletedMeetingChain.vue

@@ -145,7 +145,7 @@ async function addAmendment() {
   <div class="completed-chain">
     <n-card class="completed-summary">
       <header class="section-heading">
-        <div><p class="eyebrow">Trusted record</p><h2>{{ tr('会议完成链条', 'Completed Meeting Record') }}</h2></div>
+        <div><p class="eyebrow">{{ tr('可信档案', 'Trusted record') }}</p><h2>{{ tr('会议完成链条', 'Completed Meeting Record') }}</h2></div>
         <div v-if="canContribute" class="page-header-actions"><button class="button button-quiet" @click="amendmentOpen = !amendmentOpen">{{ tr('添加更正', 'Add Amendment') }}</button></div>
       </header>
       <p class="snapshot-meta">{{ tr(`快照 #${meeting.current_snapshot?.completion_number ?? '—'} · 原始记录保持只读`, `Snapshot #${meeting.current_snapshot?.completion_number ?? '—'} · Original record is read-only`) }}</p>

frontend/src/components/OutcomeComposer.vue

@@ -6,6 +6,7 @@ import { api } from '../api/client'
 import type { AgendaItem, Meeting } from '../domain/meetings'
 import type { ActionPriority } from '../domain/outcomes'
 import { useI18n } from '../i18n'
+import { errorMessage } from '../utils/errors'
 import MarkdownEditor from './MarkdownEditor.vue'
 import PluginEditorSlot from './PluginEditorSlot.vue'
 
@@ -46,7 +47,7 @@ async function save() {
     emit('saved')
     emit('close')
   } catch (caught) {
-    error.value = caught instanceof Error ? caught.message : tr(`${labels.value}保存失败`, `Failed to save ${labels.value}`)
+    error.value = errorMessage(caught, tr(`${labels.value}保存失败`, `Failed to save ${labels.value}`))
   } finally {
     saving.value = false
   }

frontend/src/components/ProjectActivityTab.vue

@@ -208,7 +208,7 @@ onMounted(() => {
 
 <template>
   <section class="workspace-section project-activity-tab">
-    <header class="section-heading"><div><p class="eyebrow">Activity</p><h2>{{ tr('项目动态', 'Project Activity') }}</h2></div></header>
+    <header class="section-heading"><div><p class="eyebrow">{{ tr('动态流', 'Activity') }}</p><h2>{{ tr('项目动态', 'Project Activity') }}</h2></div></header>
 
     <ProjectUpdateComposer v-if="canContribute" :project-id="project.id" :health="project.health" @saved="onComposerSaved" />
 

frontend/src/components/ProjectOverview.vue

@@ -68,7 +68,7 @@ onMounted(async () => {
     <section class="workspace-section project-dashboard-card">
       <div class="section-heading">
         <div>
-          <p class="eyebrow">Project state</p>
+          <p class="eyebrow">{{ tr('状态概览', 'Project state') }}</p>
           <h2>{{ tr('项目状态', 'Project State') }}</h2>
         </div>
       </div>

frontend/src/components/ProjectUpdateComposer.vue

@@ -39,7 +39,7 @@ async function submit() {
 <template>
   <form class="project-update-composer" @submit.prevent="submit">
     <div class="composer-heading">
-      <div><p class="eyebrow">Progress update</p><h3>{{ tr('追加项目进展', 'Post Project Update') }}</h3></div>
+      <div><p class="eyebrow">{{ tr('进展更新', 'Progress update') }}</p><h3>{{ tr('追加项目进展', 'Post Project Update') }}</h3></div>
       <label>{{ tr('健康度', 'Health') }}<select v-model="health"><option value="on_track">{{ tr('进展正常', 'On Track') }}</option><option value="at_risk">{{ tr('存在风险', 'At Risk') }}</option><option value="off_track">{{ tr('偏离计划', 'Off Track') }}</option><option value="unset">{{ tr('未设置', 'Unset') }}</option></select></label>
     </div>
     <PluginEditorSlot :editor-label="tr('进展记录', 'Progress Update')" v-model="content" data-testid="project-update-editor" target-type="project" :target-id="projectId" slot="project-update-editor" :metadata="{ projectId }" @notice="error = $event">

frontend/src/composables/useVersionedSave.ts

@@ -1,6 +1,7 @@
 import { ref, type Ref } from 'vue'
 
 import { ApiError } from '../api/client'
+import { errorMessage } from '../utils/errors'
 
 /**
  * Shared optimistic-concurrency primitive for entities saved with `expected_version`.
@@ -42,7 +43,7 @@ export function useVersionedSave<T>(
         }
         return null
       }
-      error.value = reason instanceof Error ? reason.message : String(reason)
+      error.value = errorMessage(reason, String(reason))
       return null
     } finally {
       saving.value = false

frontend/src/i18n/index.ts

@@ -1,4 +1,4 @@
-import { computed, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 
 export type Locale = 'zh' | 'en'
 
@@ -16,20 +16,39 @@ function readInitialLocale(): Locale {
   return 'zh'
 }
 
+function syncDocumentLocale(next: Locale): void {
+  try {
+    if (typeof document !== 'undefined' && document.documentElement) {
+      document.documentElement.lang = next
+    }
+    if (typeof window !== 'undefined') {
+      window.dispatchEvent(new CustomEvent('meetflow:lang-change', { detail: { lang: next } }))
+    }
+  } catch {
+    // Ignore DOM/event errors in restricted environments.
+  }
+}
+
 export const locale = ref<Locale>(readInitialLocale())
+syncDocumentLocale(locale.value)
+
+watch(locale, (next) => {
+  syncDocumentLocale(next)
+})
 
 export const isEn = computed(() => locale.value === 'en')
 
 export function setLocale(lang: Locale): void {
   const next: Locale = lang === 'en' ? 'en' : 'zh'
-  locale.value = next
   try {
     if (typeof window !== 'undefined' && window.localStorage) {
       window.localStorage.setItem(STORAGE_KEY, next)
     }
   } catch {
     // Ignore storage write errors.
   }
+  locale.value = next
+  syncDocumentLocale(next)
 }
 
 export function toggleLocale(): Locale {

frontend/src/tests/agenda-workbench.test.ts

@@ -138,7 +138,7 @@ describe('agenda workbench', () => {
     expect(workbench).toContainElement(detail)
     expect(workbench).toContainElement(queue)
     expect(detail).toHaveClass('agenda-empty-compact')
-    expect(within(detail).getByText('Current topic')).toBeVisible()
+    expect(within(detail).getByText('当前议题')).toBeVisible()
     expect(detail.compareDocumentPosition(queue) & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy()
     expect(within(queue).getByRole('button', { name: '+ 议题' })).toBeVisible()
     expect(within(detail).queryByRole('button', { name: '添加议题' })).not.toBeInTheDocument()

frontend/src/tests/ai-work-assistant-plugin.test.ts

@@ -161,3 +161,27 @@ it('does not mutate editor content when a job fails', async () => {
   expect(emitted().draft).toBeUndefined()
   expect(emitted().notice).toEqual([['模型不可用']])
 })
+
+it('re-renders mounted assistant controls reactively when language switches between zh and en', async () => {
+  const { setLocale } = await import('../i18n')
+  setLocale('zh')
+  const registered = registerAssistant()
+  renderAssistant(registered, 'meeting-summary-editor')
+
+  expect(screen.getByText('AI 协助纪要')).toBeInTheDocument()
+  expect(screen.getByText('当前编辑块')).toBeInTheDocument()
+  expect(screen.getByRole('button', { name: '生成会议纪要' })).toBeInTheDocument()
+
+  setLocale('en')
+  await nextTick()
+
+  expect(screen.getByText('AI Summary Assistant')).toBeInTheDocument()
+  expect(screen.getByText('Current Block')).toBeInTheDocument()
+  expect(screen.getByRole('button', { name: 'Generate Meeting Minutes' })).toBeInTheDocument()
+
+  setLocale('zh')
+  await nextTick()
+
+  expect(screen.getByText('AI 协助纪要')).toBeInTheDocument()
+  expect(screen.getByRole('button', { name: '生成会议纪要' })).toBeInTheDocument()
+})

frontend/src/tests/api-client.test.ts

@@ -1,9 +1,14 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
 
-import { api, apiDownload, ApiError } from '../api/client'
+import { api, apiDownload, ApiError, apiErrorMessage } from '../api/client'
+import { setLocale } from '../i18n'
+import { errorMessage, translateBackendError } from '../utils/errors'
 
 describe('api client', () => {
-  afterEach(() => vi.unstubAllGlobals())
+  afterEach(() => {
+    setLocale('zh')
+    vi.unstubAllGlobals()
+  })
 
   it('sends cookies and JSON content type', async () => {
     const fetchMock = vi.fn().mockResolvedValue(new Response(JSON.stringify({ ok: true }), {
@@ -68,4 +73,21 @@ describe('api client', () => {
     expect(result.filename).toBe('meeting notes.md')
     expect(result.blob.size).toBe(5)
   })
+
+  it('translates backend Chinese errors and worker diagnostics in en mode', () => {
+    setLocale('en')
+
+    expect(apiErrorMessage({ error: { code: 'invalid_credentials', message: '用户名或密码错误' } }))
+      .toBe('Incorrect username or password')
+    expect(apiErrorMessage({ error: { code: 'validation_error', message: '请求参数无效' } }))
+      .toBe('Invalid request parameters')
+    expect(apiErrorMessage({ error: { code: 'meeting_locked', message: '已结束的会议不可直接修改' } }))
+      .toBe('Meeting is locked')
+    expect(translateBackendError('认证或权限失败；检查管理员插件设置中的 API Key、服务地址和权限。', 'provider_auth_failed'))
+      .toBe('Authentication or permission failed; check API Key, endpoint URL, and permissions in plugin settings.')
+    expect(translateBackendError('插件清单无效', 'ManifestError'))
+      .toBe('Invalid plugin manifest')
+    expect(errorMessage(new Error('未知后端中文错误'), 'Sign in failed'))
+      .toBe('Sign in failed')
+  })
 })