diff --git a/backend/app/contracts.py b/backend/app/contracts.py
index 22b47e8..2cebba3 100644
--- a/backend/app/contracts.py
+++ b/backend/app/contracts.py
@@ -993,6 +993,8 @@ class TranscriptionJob(Contract):
 
 
 class IndexStatus(Contract):
+    total_notes: int = 0
+    total_blocks: int = 0
     status: Literal["idle", "queued", "running", "failed"] = "idle"
     pending_jobs: int = 0
     active_job_id: str | None = None
diff --git a/backend/app/routes.py b/backend/app/routes.py
index 38d319b..ef9f8d3 100644
--- a/backend/app/routes.py
+++ b/backend/app/routes.py
@@ -120,6 +120,13 @@ from app.services.attachment_service import attachment_path
 router = APIRouter(prefix="/api")
 
 
+@router.get("/permissions/policy", tags=["Permissions"])
+async def get_permission_policy() -> dict[str, str]:
+    from app.agent.permissions import KNOWN_PERMISSIONS
+    return {permission: container.permissions.policy.mode_for(permission).value
+            for permission in sorted(KNOWN_PERMISSIONS)}
+
+
 async def mcp_call_async(operation):
     """Even registry reads can wait on lifecycle locks; keep all MCP work off the event loop."""
     try:
diff --git a/backend/app/services/index_service.py b/backend/app/services/index_service.py
index c501f57..e635577 100644
--- a/backend/app/services/index_service.py
+++ b/backend/app/services/index_service.py
@@ -126,9 +126,12 @@ async def rebuild(request: IndexRebuildRequest) -> IndexJob:
 
 
 def get_status() -> IndexStatus:
+    counts = repository.stats()
     if _active_job_id is not None:
-        return IndexStatus(status="running", pending_jobs=0, active_job_id=_active_job_id)
+        return IndexStatus(status="running", pending_jobs=0, active_job_id=_active_job_id,
+                           total_notes=counts["notes"], total_blocks=counts["blocks"])
     return IndexStatus(
+        total_notes=counts["notes"], total_blocks=counts["blocks"],
         status="failed" if _last_error else "idle",
         pending_jobs=0,
         last_completed_at=_last_completed_at,
diff --git a/backend/tests/test_live_frontend_metadata.py b/backend/tests/test_live_frontend_metadata.py
new file mode 100644
index 0000000..96c6d4e
--- /dev/null
+++ b/backend/tests/test_live_frontend_metadata.py
@@ -0,0 +1,31 @@
+import asyncio
+
+from fastapi.testclient import TestClient
+
+from app.main import app
+from app.container import container
+from app.agent.permissions import PermissionMode
+from app.services.note_service import create_note
+
+
+def test_index_status_returns_real_counts():
+    with TestClient(app) as client:
+        initial = client.get('/api/index/status').json()
+        assert (initial['total_notes'], initial['total_blocks']) == (0, 0)
+        note = asyncio.run(create_note(title='Real note', markdown='# Real note\n\ncontent', folder=None, tags=[]))
+        result = client.get('/api/index/status').json()
+        assert result['total_notes'] == 1
+        assert result['total_blocks'] == len(note.blocks)
+
+
+def test_permissions_endpoint_reads_effective_backend_policy():
+    policy = container.permissions.policy
+    original = policy.mode_for('attachments.read')
+    try:
+        policy.set_rule('attachments.read', PermissionMode.deny)
+        with TestClient(app) as client:
+            response = client.get('/api/permissions/policy')
+        assert response.status_code == 200
+        assert response.json()['attachments.read'] == 'deny'
+    finally:
+        policy.set_rule('attachments.read', original)
diff --git a/docs/contracts/后端接口契约-开发版.md b/docs/contracts/后端接口契约-开发版.md
index 60b401c..b2a3ed8 100644
--- a/docs/contracts/后端接口契约-开发版.md
+++ b/docs/contracts/后端接口契约-开发版.md
@@ -190,3 +190,9 @@ RunCancelled
 - 接入业务模块时保持当前路径和 Contract，不在 Router 中直接实现数据库、Provider 或 Agent 逻辑。
 
 第二阶段开发保持本文件中已有路径兼容，并按 `第二阶段接口契约-开发版.md` 增加子资源、可选字段和事件。接口完成后先更新 OpenAPI 与本文件，再将第二阶段文档中的状态改为已实现。
+
+
+### 前端真实状态补充（2026-09-04）
+
+- `GET /api/index/status` 额外返回 `total_notes: int` 和 `total_blocks: int`，来自当前 SQLite 索引；未建立内容索引时为 0。
+- `GET /api/permissions/policy` 返回 `Record<string, "allow" | "confirm" | "deny">`，值取自后端当前生效的 PermissionPolicy。此接口只读，不提供全局修改能力，运行时权限确认仍使用既有 Agent permission endpoint。
diff --git a/docs/development/前端壳子与接口层开发说明.md b/docs/development/前端壳子与接口层开发说明.md
index 964912f..13437e4 100644
--- a/docs/development/前端壳子与接口层开发说明.md
+++ b/docs/development/前端壳子与接口层开发说明.md
@@ -1,6 +1,6 @@
 # 前端壳子与接口层开发说明
 
-> 更新日期：2026-09-02
+> 更新日期：2026-09-04
 > 适用范围：Vue 3 + TypeScript 页面、Workspace、公共 Service、FastAPI 接口适配和 SSE。
 > 文档用途：帮助团队理解当前前端可用能力、模块边界、启动方式和后续页面开发入口。
 
@@ -153,12 +153,7 @@ Service 已适配当前 FastAPI Contract：
 - 识别 `Done`、`RunCompleted`、`RunFailed` 和 `RunCancelled`；
 - 支持 AbortController 主动取消。
 
-Chat Store 已从定时器模拟输出切换为真实 `/api/chat` SSE。默认离线联调配置为：
-
-```text
-provider_id = mock
-model       = mock-1
-```
+Chat Store 使用真实 `/api/chat` SSE。提供商从后端配置加载，前端不展示后端内置测试 Provider，也不预选模拟模型；模型 ID 使用所选提供商保存的默认值，并支持手动输入。
 
 ## 8. 环境和启动
 
@@ -207,3 +202,34 @@ Vite 当前会提示 Chat 与 Workspace 的部分异步 Chunk 超过 500 kB，
 - Workspace 接入 Tauri 后，需要增加路径规范化、写入失败恢复和外部修改冲突测试；
 - 页面新增交互必须经过键盘、空状态、加载状态、错误状态和窄窗口检查；
 - Workspace 的 Milkdown 写作模式与 CodeMirror 源码模式共享同一 Markdown 数据源；后续修改编辑器时不得改变 Store/Service 边界，并必须保留文件切换、自动保存和选区格式化回归测试。
+
+
+## 阶段 F 前：前端真实数据清理
+
+已删除运行时的聊天示例、Agent Run/Event/Tool/权限示例、Provider/Model、Task、Skill、Plugin、IndexStatus 常量和 searchMock。测试文件中的隔离桩保留，仅用于自动化验证。
+
+- 所有业务 Store 从空集合开始，由真实 API 填充；连接失败显示错误，不回退演示记录。
+- 普通聊天仅显示用户实际输入和 SSE 响应；当前会话列表保留在页面会话内，刷新后清空，后端暂无聊天历史持久化接口。切换会话保留本次会话内的真实消息，取消旧流并屏蔽迟到回调。
+- 聊天页移除尚未接入的知识库与 Skill 开关，知识库工具和 Skill 通过 Agent 使用。
+- 设置页不再伪造健康状态、版本、42 篇笔记/318 个 Block、模型名称和索引能力开关。状态未获取时显示 unknown/未获取；应用版本来自 package.json，后端版本来自 /api/status。
+- GET /api/index/status 增加 total_notes、total_blocks，直接读取 SQLite 的当前索引统计。
+- GET /api/permissions/policy 返回 PermissionPolicy 的实际生效值。设置页只读展示；全局策略编辑暂未开放，运行权限确认仍走原有 Agent 接口。
+- 删除模拟重启成功逻辑，说明 Web 端不具备进程重启能力；索引页面只保留后端已实现的全量重建。
+- Task DTO 不再填充后端未返回的优先级和来源，Agent Token 用量不再把未知输入/输出拆分填成 0。
+- Plugin/Skill/Provider 无记录时显示空状态，模型发现失败时允许使用真实的手动模型 ID。
+
+验证：前端 81 项测试、类型检查与生产构建通过；后端 454 项测试通过。新增测试覆盖空初始状态、离线错误、真实统计与权限、测试 Provider 过滤、真实聊天历史及旧流隔离。本次未调用真实付费推理 API。
+
+### MCP 工具中文展示补充
+
+Agent 工具列表按 `mcp.<server_id>.<remote_name>` 的远程工具名匹配中文展示，支持 `web_search`（网页搜索）、`understand_image`（图像理解），并补充 `text.uppercase`（文本转大写）。此映射只影响界面，工具调用与权限选择仍使用完整原始 ID。
+
+卡片默认显示三行摘要，完整服务原文可展开查看，展开操作不会改变工具选择。服务已提供中文说明时优先保留；未收录的 MCP 工具明确提示暂无中文说明，不将本地摘要当作服务协议或自动翻译结果。原始说明及其中的参数规则完整保留。
+
+验证：前端 84 项测试、类型检查与生产构建通过。新增回归覆盖不同服务器命名空间、未知工具、服务中文说明、原文完整性，以及选择工具时保留原始 ID。
+
+### 聊天模型选择审阅修复
+
+返回聊天页时保留仍启用的提供商与手动模型 ID，仅刷新其模型列表；未选择、已删除或已禁用的提供商才回退到默认值。提供商加载失败时保留当前选择并展示错误。新增页面重新挂载与异常分支回归，前端共 89 项测试通过。
+
+补充卸载时序修复：提供商或技能加载期间离开聊天页后，旧页面的初始化回调不再修改聊天选择，迟到错误也不再更新旧页面。两种加载延迟均通过先失败、修复后通过的回归测试，并验证返回页面后的默认模型和发送按钮状态；前端共 91 项测试通过。
diff --git a/frontend/src/components/common/StatusBar.vue b/frontend/src/components/common/StatusBar.vue
index 992191e..db815a2 100644
--- a/frontend/src/components/common/StatusBar.vue
+++ b/frontend/src/components/common/StatusBar.vue
@@ -39,11 +39,12 @@ const saveStatusColor = computed(() => {
 
 const indexStatusText = computed(() => {
   const s = settingsStore.indexStatus.status
-  return s === 'idle' ? '索引就绪' : s === 'indexing' ? `索引中 (${settingsStore.indexStatus.pending_jobs})` : '索引错误'
+  return s === 'unknown' ? '索引状态未获取' : s === 'idle' ? '索引就绪' : s === 'indexing' ? `索引中 (${settingsStore.indexStatus.pending_jobs})` : '索引错误'
 })
 
 const aiCoreStatusText = computed(() => {
   const map: Record<string, string> = {
+    unknown: 'AI Core 状态未获取',
     starting: 'AI Core 启动中',
     running: 'AI Core 运行中',
     stopped: 'AI Core 已停止',
diff --git a/frontend/src/contracts/index.ts b/frontend/src/contracts/index.ts
index 8449a6e..d550c0a 100644
--- a/frontend/src/contracts/index.ts
+++ b/frontend/src/contracts/index.ts
@@ -207,8 +207,8 @@ export interface PermissionRequest {
 }
 
 export interface TokenUsage {
-  input_tokens: number
-  output_tokens: number
+  input_tokens?: number
+  output_tokens?: number
   total_tokens: number
 }
 
@@ -462,11 +462,11 @@ export interface TaskItem {
   title: string
   description?: string
   status: TaskStatus
-  priority: TaskPriority
+  priority?: TaskPriority
   due_date?: string
   note_id?: string
   note_title?: string
-  source: TaskSource
+  source?: TaskSource
   created_at: string
   updated_at: string
 }
@@ -487,12 +487,12 @@ export interface ThemeConfig {
 // ============ Index ============
 
 export interface IndexStatus {
-  status: 'idle' | 'indexing' | 'error'
+  status: 'unknown' | 'idle' | 'indexing' | 'error'
   pending_jobs: number
-  total_notes: number
-  total_blocks: number
-  fts_enabled: boolean
-  vector_enabled: boolean
+  total_notes: number | null
+  total_blocks: number | null
+  fts_enabled?: boolean
+  vector_enabled?: boolean
   embedding_model?: string
   reranker_model?: string
   last_indexed_at?: string
@@ -527,7 +527,7 @@ export type SaveStatus =
   | 'external_changed'
   | 'conflict'
 
-export type AiCoreStatus = 'starting' | 'running' | 'stopped' | 'error'
+export type AiCoreStatus = 'unknown' | 'starting' | 'running' | 'stopped' | 'error'
 
 // ============ FastAPI wire contracts ============
 // UI view models above may contain presentation-only fields. Services must use
@@ -777,6 +777,8 @@ export interface ApiTask {
 }
 
 export interface ApiIndexStatus {
+  total_notes: number
+  total_blocks: number
   status: 'idle' | 'queued' | 'running' | 'failed'
   pending_jobs: number
   active_job_id?: string | null
diff --git a/frontend/src/features/agent/AgentView.vue b/frontend/src/features/agent/AgentView.vue
index a7f41fd..283f44d 100644
--- a/frontend/src/features/agent/AgentView.vue
+++ b/frontend/src/features/agent/AgentView.vue
@@ -5,7 +5,8 @@ import { useAgentStore } from '@/stores/agent'
 import { useProviderStore } from '@/stores/provider'
 import { useSkillStore } from '@/stores/skill'
 import type { AgentEvent } from '@/contracts'
-import { eventLabel, localizeDetails, permissionLabel, runStatusLabel, toolDescription, toolLabel } from './labels'
+import { eventLabel, localizeDetails, permissionLabel, runStatusLabel, toolLabel } from './labels'
+import ToolOption from './ToolOption.vue'
 
 const route = useRoute()
 const router = useRouter()
@@ -14,7 +15,7 @@ const providerStore = useProviderStore()
 const skillStore = useSkillStore()
 const pageError = ref('')
 const form = reactive({
-  input: '', provider_id: 'mock', model: 'mock-1', skill_id: '', max_steps: 10,
+  input: '', provider_id: '', model: '', skill_id: '', max_steps: 10,
   tool_timeout_seconds: 30, run_timeout_seconds: 300, token_budget: 8000,
   allow_network: false, max_concurrent_tools: 1, allowed_tools: [] as string[],
 })
@@ -25,7 +26,7 @@ const isNewRun = computed(() => !route.params.runId)
 onMounted(async () => {
   try {
     await Promise.all([providerStore.loadProviders(), skillStore.loadSkills(), agentStore.loadTools()])
-    await providerStore.loadModels(form.provider_id)
+    form.provider_id = providerStore.defaultProviderId
   } catch (error) { pageError.value = error instanceof Error ? error.message : '智能体配置加载失败' }
 })
 
@@ -35,7 +36,10 @@ watch(() => route.params.runId, async (runId) => {
 }, { immediate: true })
 
 watch(() => form.provider_id, async (providerId) => {
-  try { await providerStore.loadModels(providerId); form.model = models.value[0]?.model_id ?? '' } catch { /* page keeps current selection */ }
+  form.model = providerStore.providers.find(p => p.provider_id === providerId)?.default_model ?? ''
+  if (!providerId) return
+  try { await providerStore.loadModels(providerId) }
+  catch (error) { if (form.provider_id === providerId) pageError.value = error instanceof Error ? error.message : '模型列表加载失败，请手动填写模型 ID。' }
 })
 
 function toggleTool(name: string) {
@@ -47,6 +51,7 @@ function toggleTool(name: string) {
 async function createRun() {
   pageError.value = ''
   try {
+    if (!form.provider_id || !form.model.trim()) throw new Error('请选择提供商并填写模型 ID。')
     const run = await agentStore.createRun({
       input: form.input, provider_id: form.provider_id, model: form.model,
       skill_id: form.skill_id || undefined, allowed_tools: form.allowed_tools,
@@ -71,12 +76,12 @@ function eventText(event: AgentEvent) {
   <section class="feature-page agent-page">
     <header class="feature-header"><div><h1>{{ isNewRun ? '创建智能体运行' : '智能体执行轨迹' }}</h1><p>配置执行边界，并实时查看模型、工具和权限事件。</p></div>
       <button v-if="!isNewRun" class="button-secondary" @click="router.push({ name: 'agent' })">新建运行</button></header>
-    <div v-if="pageError || agentStore.error" class="error-banner">{{ pageError || agentStore.error }}</div>
+    <div v-if="pageError || agentStore.error || providerStore.error" class="error-banner">{{ pageError || agentStore.error || providerStore.error }}</div>
     <form v-if="isNewRun" class="panel run-form" @submit.prevent="createRun">
       <div class="field"><label>任务</label><textarea v-model="form.input" class="textarea" required placeholder="描述希望智能体完成的任务" /></div>
       <div class="form-grid">
         <div class="field"><label>模型提供商</label><select v-model="form.provider_id" class="select"><option v-for="p in providerStore.enabledProviders" :key="p.provider_id" :value="p.provider_id">{{ p.name }}</option></select></div>
-        <div class="field"><label>模型</label><select v-model="form.model" class="select"><option v-for="m in models" :key="m.model_id" :value="m.model_id">{{ m.name }}</option></select></div>
+        <div class="field"><label>模型</label><input v-model="form.model" class="input" list="agent-models" placeholder="填写模型 ID" required /><datalist id="agent-models"><option v-for="m in models" :key="m.model_id" :value="m.model_id">{{ m.name }}</option></datalist></div>
         <div class="field"><label>技能</label><select v-model="form.skill_id" class="select"><option value="">不使用技能</option><option v-for="s in skillStore.readySkills" :key="s.skill_id" :value="s.skill_id">{{ s.name }}</option></select></div>
         <div class="field"><label>最大步骤</label><input v-model.number="form.max_steps" class="input" type="number" min="1" max="100" /></div>
         <div class="field"><label>工具超时（秒）</label><input v-model.number="form.tool_timeout_seconds" class="input" type="number" min="1" /></div>
@@ -84,9 +89,9 @@ function eventText(event: AgentEvent) {
         <div class="field"><label>令牌预算</label><input v-model.number="form.token_budget" class="input" type="number" min="1" /></div>
         <div class="field"><label>最大并发工具</label><input v-model.number="form.max_concurrent_tools" class="input" type="number" min="1" /></div>
       </div>
-      <div class="field"><label>允许使用的工具</label><div class="tool-grid"><label v-for="tool in agentStore.tools" :key="tool.name" class="tool-option"><input type="checkbox" :checked="form.allowed_tools.includes(tool.name)" @change="toggleTool(tool.name)" /><span><strong>{{ toolLabel(tool.name) }}</strong><code>{{ tool.name }}</code><small>{{ toolDescription(tool.name, tool.description) }}</small></span></label></div></div>
+      <div class="field"><label>允许使用的工具</label><div class="tool-grid"><ToolOption v-for="tool in agentStore.tools" :key="tool.name" :name="tool.name" :description="tool.description" :selected="form.allowed_tools.includes(tool.name)" @toggle="toggleTool" /></div></div>
       <label class="network"><input v-model="form.allow_network" type="checkbox" /> 允许本次运行调用网络工具</label>
-      <div class="inline-actions"><button class="button-primary" :disabled="agentStore.isCreating || !form.input.trim()">{{ agentStore.isCreating ? '创建中…' : '创建并运行' }}</button></div>
+      <div class="inline-actions"><button class="button-primary" :disabled="agentStore.isCreating || !form.input.trim() || !form.provider_id || !form.model.trim()">{{ agentStore.isCreating ? '创建中…' : '创建并运行' }}</button></div>
     </form>
 
     <div v-else class="trace-layout">
@@ -110,12 +115,7 @@ function eventText(event: AgentEvent) {
 <style scoped>
 .agent-page > * { width: min(100%, 1080px); margin-inline: auto; }
 .run-form { display: grid; gap: var(--space-xl); }
-.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--space-sm); }
-.tool-option { display: flex; gap: var(--space-sm); padding: var(--space-md); border: 1px solid var(--color-border-default); border-radius: var(--radius-md); background: var(--color-surface-primary); cursor: pointer; transition: border-color var(--motion-fast), background-color var(--motion-fast), transform var(--motion-fast), box-shadow var(--motion-fast); }
-.tool-option:hover { border-color: var(--color-accent-secondary); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
-.tool-option:has(input:checked) { border-color: var(--color-accent-primary); background: var(--color-accent-soft); box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-accent-primary) 10%, transparent); }
-.tool-option small { display: block; color: var(--color-text-secondary); }
-.tool-option code { display: block; margin: 2px 0; color: var(--color-text-tertiary); font-size: var(--font-size-xs); }
+.tool-grid { display: grid; align-items: start; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--space-sm); }
 .network { display: flex; gap: var(--space-sm); }
 .trace-layout { display: grid; gap: var(--space-lg); }
 .run-summary, .event-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
diff --git a/frontend/src/features/agent/ToolOption.spec.ts b/frontend/src/features/agent/ToolOption.spec.ts
new file mode 100644
index 0000000..20fbdf8
--- /dev/null
+++ b/frontend/src/features/agent/ToolOption.spec.ts
@@ -0,0 +1,19 @@
+// @vitest-environment happy-dom
+import { mount } from '@vue/test-utils'
+import { expect, it } from 'vitest'
+import ToolOption from './ToolOption.vue'
+
+it('shows Chinese summaries, preserves raw metadata and emits the original tool ID', async () => {
+  const name = 'mcp.9ca7ee21603a.web_search'
+  const description = 'Search the web. query: string. ' + 'Full provider instructions. '.repeat(40)
+  const wrapper = mount(ToolOption, { props: { name, description, selected: false } })
+  expect(wrapper.get('strong').text()).toBe('网页搜索')
+  expect(wrapper.get('code').text()).toBe(name)
+  expect(wrapper.get('.tool-summary').text()).toContain('搜索关键词')
+  expect(wrapper.get('details').attributes('open')).toBeUndefined()
+  expect(wrapper.get('details p').element.textContent).toBe(description)
+  await wrapper.get('summary').trigger('click')
+  expect(wrapper.emitted('toggle')).toBeUndefined()
+  await wrapper.get('input').setValue(true)
+  expect(wrapper.emitted('toggle')).toEqual([[name]])
+})
diff --git a/frontend/src/features/agent/ToolOption.vue b/frontend/src/features/agent/ToolOption.vue
new file mode 100644
index 0000000..766e401
--- /dev/null
+++ b/frontend/src/features/agent/ToolOption.vue
@@ -0,0 +1,40 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import { toolDescription, toolLabel } from './labels'
+
+const props = defineProps<{ name: string; description: string; selected: boolean }>()
+const emit = defineEmits<{ toggle: [name: string] }>()
+const summary = computed(() => toolDescription(props.name, props.description))
+const showOriginal = computed(() => props.description.length > 0)
+</script>
+
+<template>
+  <article class="tool-choice" :class="{ selected }">
+    <label class="tool-selection">
+      <input type="checkbox" :checked="selected" @change="emit('toggle', name)" />
+      <span class="tool-copy">
+        <strong>{{ toolLabel(name) }}</strong>
+        <code>{{ name }}</code>
+        <small class="tool-summary">{{ summary }}</small>
+      </span>
+    </label>
+    <details v-if="showOriginal" class="tool-original">
+      <summary>查看服务原文与参数</summary>
+      <p>{{ description }}</p>
+    </details>
+  </article>
+</template>
+
+<style scoped>
+.tool-choice { min-width: 0; padding: var(--space-md); border: 1px solid var(--color-border-default); border-radius: var(--radius-md); background: var(--color-surface-primary); }
+.tool-choice.selected { border-color: var(--color-accent-primary); background: var(--color-accent-soft); }
+.tool-selection { display: flex; align-items: flex-start; gap: var(--space-sm); cursor: pointer; }
+.tool-selection input { flex-shrink: 0; margin-top: 4px; }
+.tool-copy { min-width: 0; overflow-wrap: anywhere; }
+.tool-copy strong, .tool-copy code, .tool-summary { display: block; }
+.tool-copy code { margin: 3px 0; color: var(--color-text-tertiary); font-size: var(--font-size-xs); }
+.tool-summary { color: var(--color-text-secondary); line-height: 1.6; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; overflow: hidden; }
+.tool-original { margin-top: var(--space-sm); font-size: var(--font-size-xs); }
+.tool-original summary { cursor: pointer; color: var(--color-text-secondary); }
+.tool-original p { white-space: pre-wrap; overflow-wrap: anywhere; max-height: 240px; overflow: auto; margin-top: var(--space-sm); user-select: text; }
+</style>
diff --git a/frontend/src/features/agent/labels.spec.ts b/frontend/src/features/agent/labels.spec.ts
index 123ac25..fcb568a 100644
--- a/frontend/src/features/agent/labels.spec.ts
+++ b/frontend/src/features/agent/labels.spec.ts
@@ -9,6 +9,21 @@ import {
 } from './labels'
 
 describe('智能体页面中文标签', () => {
+  it('按 MCP 远程工具名匹配中文，不依赖服务器 ID', () => {
+    for (const server of ['9ca7ee21603a', 'another-server']) {
+      expect(toolLabel(`mcp.${server}.web_search`)).toBe('网页搜索')
+      expect(toolLabel(`mcp.${server}.understand_image`)).toBe('图像理解')
+      expect(toolDescription(`mcp.${server}.web_search`, 'Search the web')).toContain('搜索关键词')
+    }
+    expect(toolLabel('text.uppercase')).toBe('文本转大写')
+    expect(toolDescription('text.uppercase', 'Convert input text to uppercase.')).toContain('大写')
+  })
+
+  it('保留服务端中文，未知工具不编造翻译或套用内置工具语义', () => {
+    expect(toolDescription('mcp.server.web_search', '仅搜索指定站点。')).toBe('仅搜索指定站点。')
+    expect(toolDescription('mcp.server.custom_action', 'Private action')).toContain('暂无中文说明')
+    expect(toolLabel('mcp.server.notes.delete')).toBe('MCP 工具 · notes.delete')
+  })
   it('转换运行状态和事件名称', () => {
     expect(runStatusLabel('waiting_permission')).toBe('等待授权')
     expect(eventLabel('ToolCall')).toBe('调用工具')
diff --git a/frontend/src/features/agent/labels.ts b/frontend/src/features/agent/labels.ts
index c6646d6..0ed56b5 100644
--- a/frontend/src/features/agent/labels.ts
+++ b/frontend/src/features/agent/labels.ts
@@ -42,6 +42,7 @@ const toolLabels: Record<string, string> = {
   'tasks.list': '列出任务',
   'attachments.read': '读取附件',
   'audio.transcribe': '音频转写',
+  'text.uppercase': '文本转大写',
 }
 
 const toolDescriptions: Record<string, string> = {
@@ -58,7 +59,25 @@ const toolDescriptions: Record<string, string> = {
   'tasks.update': '更新已有任务。',
   'tasks.list': '列出已持久化的任务。',
   'attachments.read': '读取由宿主管理的 UTF-8 附件。',
-  'audio.transcribe': '读取音频附件已有的宿主转写结果。',
+  'audio.transcribe': '将音频转写为文本，按模型路由使用 API 或本地后端。',
+  'text.uppercase': '将输入文本中的字母转换为大写。',
+}
+
+// MCP IDs contain a server-specific namespace. Localize the remote tool name
+// for presentation only; requests must keep using the complete original ID.
+const mcpTools: Record<string, { label: string; description: string }> = {
+  web_search: {
+    label: '网页搜索',
+    description: '搜索实时或外部网页信息。输入搜索关键词；结果包含标题、链接、摘要等信息。时效性问题可在关键词中加入日期，完整参数以服务原文为准。',
+  },
+  understand_image: {
+    label: '图像理解',
+    description: '根据提示词分析图片、描述内容或提取信息。输入分析要求和图片地址或本地路径；支持的格式与路径规则请查看服务原文。',
+  },
+}
+
+function mcpName(name: string): string | undefined {
+  return /^mcp\.[^.]+\.(.+)$/.exec(name)?.[1]
 }
 
 const permissionLabels: Record<string, string> = {
@@ -105,10 +124,17 @@ export function eventLabel(event: AgentEventType): string {
 }
 
 export function toolLabel(name: string): string {
+  const remote = mcpName(name)
+  if (remote) return mcpTools[remote]?.label ?? `MCP 工具 · ${remote}`
   return toolLabels[name] ?? name
 }
 
 export function toolDescription(name: string, fallback: string): string {
+  const remote = mcpName(name)
+  if (remote) {
+    if (/\p{Script=Han}/u.test(fallback)) return fallback
+    return mcpTools[remote]?.description ?? '暂无中文说明，请展开查看服务原文。'
+  }
   return toolDescriptions[name] ?? fallback
 }
 
diff --git a/frontend/src/features/chat/ChatView.spec.ts b/frontend/src/features/chat/ChatView.spec.ts
new file mode 100644
index 0000000..fe1d731
--- /dev/null
+++ b/frontend/src/features/chat/ChatView.spec.ts
@@ -0,0 +1,89 @@
+// @vitest-environment happy-dom
+import { beforeEach, expect, it, vi } from 'vitest'
+import { flushPromises, mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { useChatStore } from '@/stores/chat'
+import { useProviderStore } from '@/stores/provider'
+import { useSkillStore } from '@/stores/skill'
+import ChatView from './ChatView.vue'
+
+vi.mock('vue-router', () => ({ useRouter: () => ({ push: vi.fn() }) }))
+vi.mock('@/stores/editor', () => ({ useEditorStore: () => ({}) }))
+vi.mock('@/stores/workspace', () => ({ useWorkspaceStore: () => ({}) }))
+vi.mock('@/components/common/MarkdownContent.vue', () => ({ default: { template: '<div />' } }))
+
+beforeEach(() => {
+  setActivePinia(createPinia())
+  const providers = useProviderStore()
+  providers.providers = ['a', 'b'].map(id => ({
+    provider_id: id, provider_type: 'openai_compatible', name: id,
+    default_model: `${id}-default`, enabled: true, capabilities: { chat: true }, has_credential: false,
+  }))
+  providers.defaultProviderId = 'a'
+  vi.spyOn(providers, 'loadProviders').mockResolvedValue(undefined)
+  vi.spyOn(providers, 'loadModels').mockResolvedValue([])
+  vi.spyOn(useSkillStore(), 'loadSkills').mockResolvedValue(undefined)
+})
+
+it('preserves the selected provider and manual model after leaving and returning to chat', async () => {
+  const chat = useChatStore()
+  const first = mount(ChatView)
+  await flushPromises()
+  await first.get('select').setValue('b')
+  await first.get('input[list="chat-models"]').setValue('b-manual')
+  first.unmount()
+  const returned = mount(ChatView)
+  await flushPromises()
+  expect(chat.selectedProviderId).toBe('b')
+  expect(chat.selectedModel).toBe('b-manual')
+  expect(useProviderStore().loadModels).toHaveBeenLastCalledWith('b')
+  returned.unmount()
+})
+
+it.each(['missing', 'disabled', 'unselected'])('uses the default when the selected provider is %s', async state => {
+  const chat = useChatStore()
+  chat.selectedProviderId = state === 'unselected' ? '' : state === 'missing' ? 'deleted' : 'b'
+  chat.selectedModel = 'old-model'
+  if (state === 'disabled') useProviderStore().providers[1]!.enabled = false
+  const wrapper = mount(ChatView)
+  await flushPromises()
+  expect(chat.selectedProviderId).toBe('a')
+  expect(chat.selectedModel).toBe('a-default')
+  wrapper.unmount()
+})
+
+it('preserves the selection when provider discovery fails', async () => {
+  const chat = useChatStore()
+  chat.selectedProviderId = 'b'
+  chat.selectedModel = 'b-manual'
+  useProviderStore().error = 'offline'
+  const wrapper = mount(ChatView)
+  await flushPromises()
+  expect(chat.selectedProviderId).toBe('b')
+  expect(chat.selectedModel).toBe('b-manual')
+  expect(wrapper.get('.error-banner').text()).toBe('offline')
+  wrapper.unmount()
+})
+
+it.each(['providers', 'skills'])('ignores initialization after unmount while %s are loading', async source => {
+  const chat = useChatStore()
+  let finish!: () => void
+  const pending = new Promise<void>(resolve => { finish = resolve })
+  if (source === 'providers') vi.mocked(useProviderStore().loadProviders).mockReturnValueOnce(pending)
+  else vi.mocked(useSkillStore().loadSkills).mockReturnValueOnce(pending)
+  const first = mount(ChatView)
+  first.unmount()
+  finish()
+  await flushPromises()
+  expect(chat.selectedProviderId).toBe('')
+  expect(chat.selectedModel).toBe('')
+  expect(useProviderStore().loadModels).not.toHaveBeenCalled()
+
+  const returned = mount(ChatView)
+  await flushPromises()
+  expect(chat.selectedProviderId).toBe('a')
+  expect(chat.selectedModel).toBe('a-default')
+  await returned.get('textarea').setValue('hello')
+  expect(returned.get('button.button-primary').attributes('disabled')).toBeUndefined()
+  returned.unmount()
+})
diff --git a/frontend/src/features/chat/ChatView.vue b/frontend/src/features/chat/ChatView.vue
index 06d4c25..7cd0525 100644
--- a/frontend/src/features/chat/ChatView.vue
+++ b/frontend/src/features/chat/ChatView.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, onMounted, ref, watch } from 'vue'
+import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import type { Citation } from '@/contracts'
 import { useChatStore } from '@/stores/chat'
@@ -16,26 +16,37 @@ const workspaceStore = useWorkspaceStore()
 const editorStore = useEditorStore()
 const router = useRouter()
 const loadError = ref('')
+let disposed = false
+onBeforeUnmount(() => { disposed = true })
 
 const availableModels = computed(() => providerStore.modelsByProvider[chatStore.selectedProviderId] ?? [])
 
 onMounted(async () => {
   try {
     await Promise.all([providerStore.loadProviders(), skillStore.loadSkills()])
-    await providerStore.loadModels(chatStore.selectedProviderId)
+    if (disposed || providerStore.error) return
+    const selected = providerStore.enabledProviders.find(p => p.provider_id === chatStore.selectedProviderId)
+    if (!selected) {
+      chatStore.selectedProviderId = providerStore.defaultProviderId
+    } else {
+      await refreshModels(selected.provider_id)
+    }
   } catch (error) {
-    loadError.value = error instanceof Error ? error.message : '无法加载 AI 配置，当前展示本地数据。'
+    if (disposed) return
+    loadError.value = error instanceof Error ? error.message : '无法加载 AI 配置，请检查后端连接。'
   }
 })
 
+async function refreshModels(providerId: string) {
+  loadError.value = ''
+  if (!providerId) return
+  try { await providerStore.loadModels(providerId) }
+  catch (error) { if (!disposed && chatStore.selectedProviderId === providerId) loadError.value = error instanceof Error ? error.message : '模型列表加载失败，请手动填写模型 ID。' }
+}
+
 watch(() => chatStore.selectedProviderId, async (providerId) => {
-  try {
-    await providerStore.loadModels(providerId)
-    const firstModel = providerStore.modelsByProvider[providerId]?.[0]
-    if (firstModel) chatStore.selectedModel = firstModel.model_id
-  } catch (error) {
-    loadError.value = error instanceof Error ? error.message : '模型列表加载失败'
-  }
+  chatStore.selectedModel = providerStore.providers.find(p => p.provider_id === providerId)?.default_model ?? ''
+  await refreshModels(providerId)
 })
 
 function send() { void chatStore.sendMessage(chatStore.inputText) }
@@ -54,17 +65,12 @@ async function openCitation(citation: Citation) {
       <div class="field compact"><label>Provider</label><select v-model="chatStore.selectedProviderId" class="select">
         <option v-for="provider in providerStore.enabledProviders" :key="provider.provider_id" :value="provider.provider_id">{{ provider.name }}</option>
       </select></div>
-      <div class="field compact"><label>Model</label><select v-model="chatStore.selectedModel" class="select">
-        <option v-for="model in availableModels" :key="model.model_id" :value="model.model_id">{{ model.name }}</option>
-      </select></div>
-      <div class="field compact"><label>Skill</label><select v-model="chatStore.selectedSkillId" class="select">
-        <option :value="null">不使用 Skill</option><option v-for="skill in skillStore.enabledSkills" :key="skill.skill_id" :value="skill.skill_id">{{ skill.name }}</option>
-      </select></div>
-      <label class="rag-toggle"><input v-model="chatStore.useRag" type="checkbox" /> 使用知识库</label>
+      <div class="field compact"><label>模型 ID</label><input v-model="chatStore.selectedModel" class="input" list="chat-models" placeholder="填写模型 ID" /><datalist id="chat-models"><option v-for="model in availableModels" :key="model.model_id" :value="model.model_id">{{ model.name }}</option></datalist></div>
+      <span class="subtle">知识库问答与技能请使用智能体；普通聊天尚未接入这些能力。</span>
     </header>
-    <div v-if="loadError" class="error-banner chat-error">{{ loadError }}</div>
+    <div v-if="loadError || providerStore.error" class="error-banner chat-error">{{ loadError || providerStore.error }}</div>
     <main class="message-timeline">
-      <div v-if="!chatStore.messages.length" class="empty-state"><div><strong>开始一段知识对话</strong><p>可以直接提问，也可以打开 RAG 让模型基于当前 Vault 回答。</p></div></div>
+      <div v-if="!chatStore.messages.length" class="empty-state"><div><strong>开始一段知识对话</strong><p>请先配置模型提供商。聊天记录仅保留在本次页面会话中。</p></div></div>
       <article v-for="message in chatStore.messages" :key="message.message_id" class="message" :class="message.role">
         <div class="avatar">{{ message.role === 'user' ? '你' : 'AI' }}</div>
         <div class="message-body">
@@ -78,7 +84,7 @@ async function openCitation(citation: Citation) {
             </button>
           </div>
           <time>{{ new Date(message.created_at).toLocaleTimeString() }}</time>
-          <small v-if="message.usage" class="usage">Token {{ message.usage.total_tokens }}（输入 {{ message.usage.input_tokens }} / 输出 {{ message.usage.output_tokens }}）</small>
+          <small v-if="message.usage" class="usage">Token {{ message.usage.total_tokens }}<span v-if="message.usage.input_tokens !== undefined && message.usage.output_tokens !== undefined">（输入 {{ message.usage.input_tokens }} / 输出 {{ message.usage.output_tokens }}）</span></small>
         </div>
       </article>
     </main>
@@ -87,7 +93,7 @@ async function openCitation(citation: Citation) {
         @keydown.ctrl.enter.prevent="send" />
       <div class="composer-actions"><span class="subtle">回答可能包含错误，请核对 Citation。</span>
         <button v-if="chatStore.isStreaming" class="button-danger" @click="chatStore.stopGeneration">停止</button>
-        <button v-else class="button-primary" :disabled="!chatStore.inputText.trim()" @click="send">发送</button>
+        <button v-else class="button-primary" :disabled="!chatStore.inputText.trim() || !chatStore.selectedProviderId || !chatStore.selectedModel.trim()" @click="send">发送</button>
       </div>
     </footer>
   </section>
diff --git a/frontend/src/features/plugins/PluginsView.vue b/frontend/src/features/plugins/PluginsView.vue
index 9b85015..f048ee3 100644
--- a/frontend/src/features/plugins/PluginsView.vue
+++ b/frontend/src/features/plugins/PluginsView.vue
@@ -27,6 +27,7 @@ async function uninstall(id: string, name: string) { if (!confirm(`卸载“${na
       <div v-if="pluginStore.selectedPlugin.dependent_skills?.length" class="notice-banner last-error">依赖此插件的 Skill：{{ pluginStore.selectedPlugin.dependent_skills.join('、') }}</div>
       <PluginMcpPanel :plugin="pluginStore.selectedPlugin" />
     </div>
+    <div v-else-if="!pluginStore.plugins.length" class="empty-state"><div><strong>{{ pluginStore.isLoading ? '正在加载…' : pluginStore.error ? '加载失败' : '尚未安装' }}</strong><button class="button-secondary" @click="pluginStore.loadPlugins">重新加载</button></div></div>
     <div v-else class="feature-grid"><article v-for="plugin in pluginStore.plugins" :key="plugin.plugin_id" class="item-card extension-card" @click="pluginStore.selectPlugin(plugin.plugin_id)"><div class="extension-title"><AppIcon :icon="Connection" :size="22" /><div><strong>{{ plugin.name }}</strong><p>v{{ plugin.version }}</p></div><span class="badge" :class="{ success: plugin.status === 'ready', error: plugin.status === 'error', warning: plugin.status === 'permission_required' }">{{ plugin.status }}</span></div><p class="muted">{{ plugin.description }}</p><p class="subtle">{{ plugin.permissions.length }} 项权限 · {{ plugin.contributions.length }} 项 Contribution</p></article></div>
   </section>
 </template>
diff --git a/frontend/src/features/settings/ProviderForm.vue b/frontend/src/features/settings/ProviderForm.vue
index eed4f28..f992f30 100644
--- a/frontend/src/features/settings/ProviderForm.vue
+++ b/frontend/src/features/settings/ProviderForm.vue
@@ -109,7 +109,7 @@ async function save() {
   error.value = ''
   saving.value = true
   try {
-    if (!form.name.trim() || (form.provider_type !== 'mock' && !form.base_url.trim())) throw new Error('请填写名称和 Base URL。')
+    if (!form.name.trim() || !form.base_url.trim()) throw new Error('请填写名称和 Base URL。')
     if (selectedPreset.value?.requires_credential && !apiKey.value.trim() && !configured.value) throw new Error('请输入 API Key。密钥将由后端加密保存。')
     // Snapshot before awaiting: closing/unmounting must never create a provider with a changed draft.
     const data = { provider_type: form.provider_type, name: form.name.trim(), base_url: form.base_url.trim() || undefined, default_model: form.default_model.trim(), enabled: form.enabled, capabilities: {}, has_credential: false }
@@ -147,9 +147,9 @@ async function save() {
           <ProviderPresetSelector :presets="presets" :model-value="form.preset_id" @update:model-value="applyPreset" />
           <p v-if="selectedPreset?.description" class="subtle">{{ selectedPreset.description }}</p>
           <div class="form-grid">
-            <label class="field"><span>接入协议</span><select v-model="form.provider_type" class="select" data-field="protocol" @change="changeConnection"><option value="openai_compatible">OpenAI Compatible</option><option value="openai_chat">OpenAI Chat</option><option value="openai_responses">OpenAI Responses</option><option value="anthropic_messages">Anthropic Messages</option><option value="ollama">Ollama</option><option v-if="provider?.provider_type === 'mock'" value="mock">Mock</option></select></label>
+            <label class="field"><span>接入协议</span><select v-model="form.provider_type" class="select" data-field="protocol" @change="changeConnection"><option value="openai_compatible">OpenAI Compatible</option><option value="openai_chat">OpenAI Chat</option><option value="openai_responses">OpenAI Responses</option><option value="anthropic_messages">Anthropic Messages</option><option value="ollama">Ollama</option></select></label>
             <label class="field"><span>名称</span><input v-model="form.name" class="input" data-field="name" required /></label>
-            <label class="field wide"><span>Base URL</span><input v-model="form.base_url" class="input" data-field="base-url" placeholder="https://api.example.com/v1" :required="form.provider_type !== 'mock'" @change="changeConnection" /></label>
+            <label class="field wide"><span>Base URL</span><input v-model="form.base_url" class="input" data-field="base-url" placeholder="https://api.example.com/v1" required @change="changeConnection" /></label>
             <label class="field wide"><span>API Key</span><input v-model="apiKey" class="input" type="password" autocomplete="new-password" spellcheck="false" :placeholder="configured ? '已配置，留空表示不修改' : '请输入 API Key（无鉴权服务可留空）'" /><small class="subtle">密钥由本地 AI Core 加密保存；提供商配置仅保存独立的凭据引用。</small></label>
             <p v-if="credentialLoading" class="subtle wide" role="status">正在检查凭据状态…</p>
             <p v-if="credentialError" class="error-text wide" role="alert">{{ credentialError }}</p>
diff --git a/frontend/src/features/settings/SettingsView.vue b/frontend/src/features/settings/SettingsView.vue
index a9dd27f..143c3e5 100644
--- a/frontend/src/features/settings/SettingsView.vue
+++ b/frontend/src/features/settings/SettingsView.vue
@@ -70,6 +70,7 @@ async function chooseDefaultModel(provider: ProviderConfig, event: Event) {
         <button class="button-primary" @click="openProvider()">新增 Provider</button>
       </div>
       <div v-if="providerStore.error || providerAction" class="error-banner">{{ providerStore.error || providerAction }}</div>
+      <p v-if="!providerStore.providers.length" class="subtle">{{ providerStore.isLoading ? '正在加载提供商…' : '尚无可用提供商，请添加真实 API 或本地 Ollama 配置。' }}</p>
       <div class="provider-list">
         <article v-for="provider in providerStore.providers" :key="provider.provider_id" class="item-card provider-card">
           <div class="provider-main">
@@ -91,17 +92,17 @@ async function chooseDefaultModel(provider: ProviderConfig, event: Event) {
             <button class="button-secondary" :disabled="providerStore.modelLoadingByProvider[provider.provider_id]" @click="refreshModels(provider)">{{ providerStore.modelLoadingByProvider[provider.provider_id] ? '获取中…' : '刷新模型' }}</button>
             <button class="button-secondary" @click="testProvider(provider)">测试</button>
             <button class="button-secondary" @click="openProvider(provider)">编辑</button>
-            <button class="button-danger" :disabled="provider.provider_id === 'mock'" @click="removeProvider(provider)">删除</button>
+            <button class="button-danger" @click="removeProvider(provider)">删除</button>
           </div>
         </article>
       </div>
     </div>
 
-    <div v-else-if="activeSection === 'index'" class="panel settings-section"><h2>索引与模型</h2><div class="index-summary"><div><span class="badge" :class="{ success: settingsStore.indexStatus.status === 'idle', error: settingsStore.indexStatus.status === 'error' }">{{ settingsStore.indexStatus.status }}</span><p>待处理任务 {{ settingsStore.indexStatus.pending_jobs }}</p></div><div><strong>{{ settingsStore.indexStatus.total_notes }}</strong><small>笔记</small></div><div><strong>{{ settingsStore.indexStatus.total_blocks }}</strong><small>Block</small></div></div><div v-if="settingsStore.indexStatus.error" class="error-banner">{{ settingsStore.indexStatus.error }}</div><div class="inline-actions"><button class="button-primary" @click="settingsStore.rebuildIndex('full')">重建全部</button><button class="button-secondary" @click="settingsStore.rebuildIndex('fts')">重建文本索引</button><button class="button-secondary" @click="settingsStore.rebuildIndex('vector')">重建向量索引</button></div><ModelRoutingSettings /></div>
+    <div v-else-if="activeSection === 'index'" class="panel settings-section"><h2>索引与模型</h2><div class="index-summary"><div><span class="badge" :class="{ success: settingsStore.indexStatus.status === 'idle', error: settingsStore.indexStatus.status === 'error' }">{{ settingsStore.indexStatus.status }}</span><p>待处理任务 {{ settingsStore.indexStatus.pending_jobs }}</p></div><div><strong>{{ settingsStore.indexStatus.total_notes ?? '未获取' }}</strong><small>笔记</small></div><div><strong>{{ settingsStore.indexStatus.total_blocks ?? '未获取' }}</strong><small>Block</small></div></div><div v-if="settingsStore.indexStatus.error" class="error-banner">{{ settingsStore.indexStatus.error }}</div><div class="inline-actions"><button class="button-primary" @click="settingsStore.rebuildIndex('full')">重建全部</button><span class="subtle">当前后端支持全量重建。</span></div><ModelRoutingSettings /></div>
 
-    <div v-else-if="activeSection === 'permissions'" class="panel settings-section"><h2>权限策略</h2><p class="muted section-description">高影响能力默认需要确认。未知权限由后端拒绝。</p><div class="permission-list"><div v-for="(policy, permission) in settingsStore.permissionPolicy" :key="permission" class="setting-row"><span><strong>{{ permission }}</strong></span><select :value="policy" class="select short" @change="settingsStore.setPermission(String(permission), ($event.target as HTMLSelectElement).value as 'allow' | 'confirm' | 'deny')"><option value="allow">允许</option><option value="confirm">每次确认</option><option value="deny">拒绝</option></select></div></div></div>
+    <div v-else-if="activeSection === 'permissions'" class="panel settings-section"><h2>权限策略</h2><p class="muted section-description">以下为后端当前生效的权限策略；全局策略编辑尚未开放，运行时按实际权限请求确认。</p><p v-if="!Object.keys(settingsStore.permissionPolicy).length" class="subtle">尚未获取权限策略，请检查后端连接并重新检测。</p><div class="permission-list"><div v-for="(policy, permission) in settingsStore.permissionPolicy" :key="permission" class="setting-row"><span><strong>{{ permission }}</strong></span><span>{{ policy === 'allow' ? '允许' : policy === 'confirm' ? '每次确认' : '拒绝' }}</span></div></div></div>
 
-    <div v-else class="panel settings-section"><h2>AI Core 诊断</h2><div v-if="settingsStore.diagnosticsError" class="error-banner">{{ settingsStore.diagnosticsError }}</div><div class="diagnostic-grid"><div class="item-card"><span class="badge" :class="{ success: settingsStore.aiCoreStatus === 'running', error: settingsStore.aiCoreStatus === 'error' }">{{ settingsStore.aiCoreStatus }}</span><h3>Sidecar 状态</h3><p class="subtle">AI Core 不可用时，Markdown 编辑仍可继续使用。</p></div><div class="item-card"><strong>{{ settingsStore.aiCoreAddress }}</strong><h3>开发 API 地址</h3><p class="subtle">正式桌面环境由 Sidecar Manager 动态提供。</p></div></div><div class="inline-actions diagnostic-actions"><button class="button-primary" @click="settingsStore.loadDiagnostics">重新检测</button><button class="button-secondary" @click="settingsStore.restartAiCore">重启 AI Core</button></div></div>
+    <div v-else class="panel settings-section"><h2>AI Core 诊断</h2><div v-if="settingsStore.diagnosticsError" class="error-banner">{{ settingsStore.diagnosticsError }}</div><div class="diagnostic-grid"><div class="item-card"><span class="badge" :class="{ success: settingsStore.aiCoreStatus === 'running', error: settingsStore.aiCoreStatus === 'error' }">{{ settingsStore.aiCoreStatus }}</span><h3>AI Core 连接状态</h3><p class="subtle">AI Core 不可用时，Markdown 编辑仍可继续使用。</p></div><div class="item-card"><strong>{{ settingsStore.aiCoreAddress }}</strong><h3>开发 API 地址</h3><p class="subtle">正式桌面环境由 Sidecar Manager 动态提供。</p></div></div><div class="inline-actions diagnostic-actions"><button class="button-primary" @click="settingsStore.loadDiagnostics">重新检测</button><span class="subtle">当前 Web 端不支持重启后端进程，请在运行后端的终端中操作。</span></div></div>
 
     <ProviderForm v-if="showProviderForm" :provider="editingProvider" :models="editingProvider ? providerStore.modelsByProvider[editingProvider.provider_id] : []" @close="showProviderForm = false" @saved="providerSaved" />
   </section>
diff --git a/frontend/src/features/skills/SkillsView.vue b/frontend/src/features/skills/SkillsView.vue
index 90c6c42..929f01f 100644
--- a/frontend/src/features/skills/SkillsView.vue
+++ b/frontend/src/features/skills/SkillsView.vue
@@ -32,6 +32,7 @@ async function uninstall(skillId: string, name: string) {
       <div class="detail-grid"><div><h3>工具</h3><div class="tag-list"><span v-for="tool in skillStore.selectedSkill.tools" :key="tool" class="badge info">{{ tool }}</span></div></div><div><h3>权限</h3><div class="tag-list"><span v-for="permission in skillStore.selectedSkill.permissions" :key="permission" class="badge warning">{{ permission }}</span></div></div><div><h3>检索配置</h3><pre>{{ JSON.stringify(skillStore.selectedSkill.retrieval_config, null, 2) }}</pre></div><div><h3>模型能力</h3><div class="tag-list"><span v-for="cap in skillStore.selectedSkill.model_requirements?.capabilities" :key="cap" class="badge">{{ cap }}</span></div></div></div>
       <div v-if="skillStore.selectedSkill.missing_dependencies?.length" class="error-banner dependencies">缺失依赖：{{ skillStore.selectedSkill.missing_dependencies.join('、') }}</div>
     </div>
+    <div v-else-if="!skillStore.skills.length" class="empty-state"><div><strong>{{ skillStore.isLoading ? '正在加载…' : skillStore.error ? '加载失败' : '尚未安装' }}</strong><button class="button-secondary" @click="skillStore.loadSkills">重新加载</button></div></div>
     <div v-else class="feature-grid"><article v-for="skill in skillStore.skills" :key="skill.skill_id" class="item-card extension-card" @click="skillStore.selectSkill(skill.skill_id)"><div class="extension-title"><AppIcon :icon="Lightning" :size="22" /><div><strong>{{ skill.name }}</strong><p>v{{ skill.version }}</p></div><span class="badge" :class="{ success: skill.status === 'ready', warning: skill.status === 'dependency_missing' }">{{ skill.status }}</span></div><p class="muted">{{ skill.description }}</p><div class="tag-list"><span v-for="permission in skill.permissions.slice(0, 3)" :key="permission" class="badge">{{ permission }}</span></div></article></div>
   </section>
 </template>
diff --git a/frontend/src/features/vault/VaultEntry.vue b/frontend/src/features/vault/VaultEntry.vue
index 93976fe..eee1b37 100644
--- a/frontend/src/features/vault/VaultEntry.vue
+++ b/frontend/src/features/vault/VaultEntry.vue
@@ -23,13 +23,13 @@ onMounted(async () => {
       await openVault(lastVaultPath)
       return
     } catch {
-      // Mock 阶段保存的旧路径可能与当前后端 Vault 不同，清除后让用户重新选择。
+      // 历史保存的旧路径可能与当前后端 Vault 不同，清除后让用户重新选择。
       localStorage.removeItem('last-vault-path')
     }
   }
-  setTimeout(() => {
+  {
     aiCoreStatus.value = settingsStore.aiCoreStatus === 'running' ? 'running' : 'stopped'
-  }, 800)
+  }
 })
 
 async function openVault(path: string) {
diff --git a/frontend/src/services/agentService.ts b/frontend/src/services/agentService.ts
index 5c95728..5ec2345 100644
--- a/frontend/src/services/agentService.ts
+++ b/frontend/src/services/agentService.ts
@@ -1,6 +1,6 @@
 import apiClient from './apiClient'
 import { SseClient } from './sseClient'
-import type { AgentRun, AgentEvent, AgentTraceResponse, ApiAgentRun, OperationResponse, PageMeta, ToolDefinition, PermissionRequest } from '@/contracts'
+import type { AgentRun, AgentEvent, AgentTraceResponse, ApiAgentRun, OperationResponse, PageMeta, ToolDefinition } from '@/contracts'
 
 function toAgentRun(run: ApiAgentRun): AgentRun {
   // API 的 token_usage 是累计值，UI 模型预留了输入/输出拆分字段。
@@ -10,8 +10,6 @@ function toAgentRun(run: ApiAgentRun): AgentRun {
     current_step: run.current_step,
     max_steps: run.max_steps,
     token_usage: {
-      input_tokens: 0,
-      output_tokens: 0,
       total_tokens: run.token_usage,
     },
     started_at: run.created_at,
@@ -107,207 +105,3 @@ export async function respondToPermission(
     decision,
   })
 }
-
-export const mockTools: ToolDefinition[] = [
-  {
-    name: 'notes.search',
-    description: '搜索笔记，支持关键词和语义检索',
-    parameters: {
-      type: 'object',
-      properties: {
-        query: { type: 'string', description: '搜索关键词' },
-        limit: { type: 'number', description: '返回结果数量' },
-      },
-      required: ['query'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'notes.read',
-    description: '读取指定笔记的完整内容',
-    parameters: {
-      type: 'object',
-      properties: {
-        note_id: { type: 'string' },
-      },
-      required: ['note_id'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'notes.create',
-    description: '创建新笔记',
-    parameters: {
-      type: 'object',
-      properties: {
-        title: { type: 'string' },
-        content: { type: 'string' },
-        folder_path: { type: 'string' },
-      },
-      required: ['title', 'content'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'rag.search',
-    description: '基于 RAG 的语义检索，返回相关知识片段',
-    parameters: {
-      type: 'object',
-      properties: {
-        query: { type: 'string' },
-        top_k: { type: 'number' },
-      },
-      required: ['query'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'tasks.create',
-    description: '创建任务',
-    parameters: {
-      type: 'object',
-      properties: {
-        title: { type: 'string' },
-        description: { type: 'string' },
-        priority: { type: 'string', enum: ['low', 'medium', 'high'] },
-      },
-      required: ['title'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'system.echo',
-    description: '回显输入内容（测试用）',
-    parameters: {
-      type: 'object',
-      properties: {
-        text: { type: 'string' },
-      },
-      required: ['text'],
-    },
-    source: 'builtin',
-  },
-  {
-    name: 'math.add',
-    description: '两数相加（测试用）',
-    parameters: {
-      type: 'object',
-      properties: {
-        a: { type: 'number' },
-        b: { type: 'number' },
-      },
-      required: ['a', 'b'],
-    },
-    source: 'builtin',
-  },
-]
-
-export const mockAgentRuns: AgentRun[] = [
-  {
-    run_id: 'run-1',
-    status: 'completed',
-    current_step: 3,
-    max_steps: 10,
-    token_usage: { input_tokens: 2340, output_tokens: 890, total_tokens: 3230 },
-    started_at: '2026-08-25T11:00:00Z',
-    completed_at: '2026-08-25T11:02:30Z',
-  },
-  {
-    run_id: 'run-2',
-    status: 'running',
-    current_step: 2,
-    max_steps: 10,
-    token_usage: { input_tokens: 1500, output_tokens: 420, total_tokens: 1920 },
-    started_at: '2026-08-26T09:30:00Z',
-  },
-]
-
-export const mockAgentEvents: AgentEvent[] = [
-  {
-    event: 'RunStarted',
-    sequence: 1,
-    run_id: 'run-1',
-    data: { task: '帮我整理红黑树的核心知识点' },
-    timestamp: '2026-08-25T11:00:00Z',
-  },
-  {
-    event: 'ThinkingDelta',
-    sequence: 2,
-    run_id: 'run-1',
-    data: { text: '我需要先搜索笔记中关于红黑树的内容...' },
-    timestamp: '2026-08-25T11:00:01Z',
-  },
-  {
-    event: 'ToolCall',
-    sequence: 3,
-    run_id: 'run-1',
-    data: {
-      tool_call_id: 'tc-1',
-      name: 'notes.search',
-      parameters: { query: '红黑树 插入 删除', limit: 5 },
-      status: 'running',
-    },
-    timestamp: '2026-08-25T11:00:02Z',
-  },
-  {
-    event: 'ToolResult',
-    sequence: 4,
-    run_id: 'run-1',
-    data: {
-      tool_call_id: 'tc-1',
-      name: 'notes.search',
-      status: 'completed',
-      result: '找到 5 条相关结果，包括红黑树性质、插入操作、删除操作等...',
-      duration_ms: 320,
-    },
-    timestamp: '2026-08-25T11:00:02Z',
-  },
-  {
-    event: 'Citation',
-    sequence: 5,
-    run_id: 'run-1',
-    data: {
-      note_id: 'n-rbt',
-      block_id: 'b1',
-      heading_path: '数据结构 / 红黑树 / 性质',
-    },
-    timestamp: '2026-08-25T11:00:03Z',
-  },
-  {
-    event: 'ThinkingDelta',
-    sequence: 6,
-    run_id: 'run-1',
-    data: { text: '搜索结果很全面，让我整理一下结构...' },
-    timestamp: '2026-08-25T11:00:03Z',
-  },
-  {
-    event: 'TextDelta',
-    sequence: 7,
-    run_id: 'run-1',
-    data: { text: '## 红黑树核心知识点整理\n\n### 1. 基本性质\n红黑树是一种自平衡二叉搜索树，每个节点带有颜色属性...' },
-    timestamp: '2026-08-25T11:00:04Z',
-  },
-  {
-    event: 'Usage',
-    sequence: 8,
-    run_id: 'run-1',
-    data: { input_tokens: 2340, output_tokens: 890, total_tokens: 3230 },
-    timestamp: '2026-08-25T11:02:30Z',
-  },
-  {
-    event: 'RunCompleted',
-    sequence: 9,
-    run_id: 'run-1',
-    data: { message: 'Task completed successfully' },
-    timestamp: '2026-08-25T11:02:30Z',
-  },
-]
-
-export const mockPermissionRequest: PermissionRequest = {
-  request_id: 'perm-1',
-  run_id: 'run-2',
-  tool_name: 'notes.create',
-  permission: 'notes.write',
-  parameters: { title: '红黑树知识点总结', folder_path: '/数据结构' },
-  impact: '将在你的知识库中创建一篇新笔记',
-}
diff --git a/frontend/src/services/chatService.ts b/frontend/src/services/chatService.ts
index 35f12b2..1976cc7 100644
--- a/frontend/src/services/chatService.ts
+++ b/frontend/src/services/chatService.ts
@@ -1,5 +1,5 @@
 import { SseClient } from './sseClient'
-import type { Conversation, ChatMessage, ModelEvent } from '@/contracts'
+import type { ModelEvent } from '@/contracts'
 
 export interface ChatRequest {
   provider_id: string
@@ -46,87 +46,3 @@ export function streamChat(
   client.connect().catch(() => {})
   return client
 }
-
-export const mockConversations: Conversation[] = [
-  {
-    conversation_id: 'conv-1',
-    title: '关于红黑树的讨论',
-    created_at: '2026-08-25T10:00:00Z',
-    updated_at: '2026-08-25T10:30:00Z',
-    message_count: 6,
-  },
-  {
-    conversation_id: 'conv-2',
-    title: '死锁避免算法',
-    created_at: '2026-08-24T14:00:00Z',
-    updated_at: '2026-08-24T15:20:00Z',
-    message_count: 4,
-  },
-  {
-    conversation_id: 'conv-3',
-    title: 'TCP三次握手',
-    created_at: '2026-08-22T09:00:00Z',
-    updated_at: '2026-08-22T09:15:00Z',
-    message_count: 3,
-  },
-]
-
-export const mockMessages: Record<string, ChatMessage[]> = {
-  'conv-1': [
-    {
-      message_id: 'msg-1',
-      conversation_id: 'conv-1',
-      role: 'user',
-      content: '红黑树的插入操作有哪些情况需要调整？',
-      created_at: '2026-08-25T10:00:00Z',
-    },
-    {
-      message_id: 'msg-2',
-      conversation_id: 'conv-1',
-      role: 'assistant',
-      content:
-        '红黑树插入后可能违反红黑性质，需要通过旋转和变色来修复。主要有以下几种情况：\n\n**情况1：叔叔节点是红色**\n- 将父节点和叔叔节点设为黑色\n- 将祖父节点设为红色\n- 当前节点上移到祖父节点，继续向上调整\n\n**情况2：叔叔节点是黑色，且当前节点是右孩子**\n- 以父节点为支点左旋\n- 将当前节点转换为左孩子，进入情况3\n\n**情况3：叔叔节点是黑色，且当前节点是左孩子**\n- 以祖父节点为支点右旋\n- 将父节点设为黑色，祖父节点设为红色\n\n以上三种情况需要从插入节点开始向上递归处理，直到根节点。',
-      created_at: '2026-08-25T10:01:00Z',
-      citations: [
-        {
-          note_id: 'n-rbt',
-          block_id: 'b1',
-          file_path: '/数据结构/红黑树.md',
-          heading_path: '数据结构 / 红黑树 / 插入操作',
-          content: '插入后可能破坏红黑性质，需要通过变色和旋转来修复...',
-        },
-        {
-          note_id: 'n-rbt',
-          block_id: 'b2',
-          file_path: '/数据结构/红黑树.md',
-          heading_path: '数据结构 / 红黑树 / 五种情况',
-          content: 'Case 1: 叔叔为红色，直接变色...',
-        },
-      ],
-    },
-    {
-      message_id: 'msg-3',
-      conversation_id: 'conv-1',
-      role: 'user',
-      content: '能对比一下 AVL 树和红黑树的性能差异吗？',
-      created_at: '2026-08-25T10:10:00Z',
-    },
-    {
-      message_id: 'msg-4',
-      conversation_id: 'conv-1',
-      role: 'assistant',
-      content:
-        'AVL 树和红黑树都是平衡二叉搜索树，但它们的平衡策略和性能特点有所不同：\n\n| 特性 | AVL 树 | 红黑树 |\n|------|--------|--------|\n| 严格平衡 | 高度差 ≤ 1 | 黑色高度相同 |\n| 查找速度 | 更快（严格平衡） | 略慢但仍为 O(log n) |\n| 插入/删除 | 旋转更多 | 旋转更少（颜色调整为主） |\n| 存储开销 | 每个节点存高度（int） | 每个节点存颜色（1 bit） |\n| 适用场景 | 读多写少 | 读写均衡或写较多 |\n\n**总结：**\n- 如果应用以查询为主，很少修改，AVL 树可能更优\n- 如果插入删除频繁，红黑树更合适，重平衡开销更低\n- 红黑树在工业界应用更广泛（C++ STL 的 map/set、Java 的 TreeMap 等）',
-      created_at: '2026-08-25T10:11:00Z',
-      citations: [
-        {
-          note_id: 'n-rbt',
-          block_id: 'b3',
-          file_path: '/数据结构/红黑树.md',
-          heading_path: '数据结构 / 红黑树 / 与AVL树对比',
-          content: '红黑树相比AVL树，牺牲了部分平衡性以换取更少的旋转操作...',
-        },
-      ],
-    },
-  ],
-}
diff --git a/frontend/src/services/indexService.ts b/frontend/src/services/indexService.ts
index 72bcd34..a4b31bf 100644
--- a/frontend/src/services/indexService.ts
+++ b/frontend/src/services/indexService.ts
@@ -5,10 +5,8 @@ function toIndexStatus(status: ApiIndexStatus): IndexStatus {
   return {
     status: status.status === 'idle' ? 'idle' : status.status === 'failed' ? 'error' : 'indexing',
     pending_jobs: status.pending_jobs,
-    total_notes: 0,
-    total_blocks: 0,
-    fts_enabled: true,
-    vector_enabled: true,
+    total_notes: status.total_notes ?? null,
+    total_blocks: status.total_blocks ?? null,
     last_indexed_at: status.last_completed_at ?? undefined,
     error: status.error_message ?? undefined,
   }
@@ -26,15 +24,3 @@ export async function rebuildIndex(scope: 'full' | 'fts' | 'vector' = 'full'): P
 export async function getIndexJob(jobId: string): Promise<ApiIndexJob> {
   return apiClient.get(`/api/index/jobs/${jobId}`)
 }
-
-export const mockIndexStatus: IndexStatus = {
-  status: 'idle',
-  pending_jobs: 0,
-  total_notes: 42,
-  total_blocks: 318,
-  fts_enabled: true,
-  vector_enabled: true,
-  embedding_model: 'bge-m3',
-  reranker_model: 'bge-reranker-base',
-  last_indexed_at: new Date().toISOString(),
-}
diff --git a/frontend/src/services/pluginService.ts b/frontend/src/services/pluginService.ts
index e9ec869..b40823f 100644
--- a/frontend/src/services/pluginService.ts
+++ b/frontend/src/services/pluginService.ts
@@ -126,92 +126,3 @@ export async function deletePluginSecret(pluginId: string, key: string): Promise
 export async function uninstallPlugin(pluginId: string): Promise<OperationResponse> {
   return apiClient.delete(`/api/plugins/${pluginId}`)
 }
-
-export const mockPlugins: Plugin[] = [
-  {
-    plugin_id: 'github-integration',
-    name: 'GitHub 集成',
-    version: '1.3.2',
-    description: '接入 GitHub API，支持搜索 Issue、查看 PR 和管理仓库',
-    icon: '',
-    author: 'NotesAgent 团队',
-    status: 'ready',
-    enabled: true,
-    permissions: ['notes.read', 'network.request'],
-    contributions: [
-      { type: 'tool', id: 'github.search_issues', name: '搜索 Issue', description: '搜索 GitHub 仓库中的 Issue' },
-      { type: 'tool', id: 'github.get_pr', name: '获取 PR 详情', description: '获取 Pull Request 的详细信息' },
-      { type: 'command', id: 'github.open_repo', name: '打开仓库', description: '在浏览器中打开对应 GitHub 仓库' },
-    ],
-    backend_type: 'mcp',
-    transport: 'stdio',
-    dependent_skills: ['research-assistant'],
-  },
-  {
-    plugin_id: 'translator',
-    name: '翻译助手',
-    version: '1.0.0',
-    description: '提供多语言翻译能力，支持文档批量翻译',
-    icon: '',
-    author: '社区贡献',
-    status: 'ready',
-    enabled: false,
-    permissions: ['notes.read', 'notes.write', 'network.request'],
-    contributions: [
-      { type: 'tool', id: 'translator.translate', name: '翻译文本', description: '翻译指定文本到目标语言' },
-      { type: 'command', id: 'translator.translate_note', name: '翻译当前笔记', description: '翻译当前打开的笔记' },
-      { type: 'settings_section', id: 'translator.settings', name: '翻译设置', description: '配置翻译服务和默认语言' },
-    ],
-    backend_type: 'mcp',
-    transport: 'stdio',
-  },
-  {
-    plugin_id: 'kanban',
-    name: '看板视图',
-    version: '0.8.0',
-    description: '为任务提供看板视图，支持拖拽排序和多维度筛选',
-    icon: '',
-    author: '社区贡献',
-    status: 'installed',
-    enabled: false,
-    permissions: ['tasks.read', 'tasks.write'],
-    contributions: [
-      { type: 'sidebar_panel', id: 'kanban.panel', name: '任务看板', description: '以看板方式查看和管理任务' },
-    ],
-    backend_type: 'internal_rpc',
-  },
-  {
-    plugin_id: 'pdf-importer',
-    name: 'PDF 导入',
-    version: '2.1.0',
-    description: '导入 PDF 文档，提取文本和目录结构生成笔记',
-    icon: '',
-    author: 'NotesAgent 团队',
-    status: 'error',
-    enabled: false,
-    permissions: ['notes.write', 'attachments.read'],
-    contributions: [
-      { type: 'importer', id: 'pdf.import', name: 'PDF 导入器', description: '从 PDF 文件导入内容' },
-    ],
-    backend_type: 'mcp',
-    transport: 'stdio',
-    last_error: 'PDF 解析库初始化失败，请检查 Python 依赖',
-  },
-  {
-    plugin_id: 'calendar',
-    name: '日历同步',
-    version: '0.5.0',
-    description: '同步日历事件，自动生成相关笔记和任务提醒',
-    icon: '',
-    author: '社区贡献',
-    status: 'dependency_missing',
-    enabled: false,
-    permissions: ['tasks.read', 'tasks.write', 'network.request'],
-    contributions: [
-      { type: 'tool', id: 'calendar.events', name: '日历事件', description: '获取日历事件列表' },
-      { type: 'sidebar_panel', id: 'calendar.widget', name: '日历小部件', description: '侧边栏日历视图' },
-    ],
-    backend_type: 'mcp',
-    transport: 'http',
-  },
-]
diff --git a/frontend/src/services/providerService.ts b/frontend/src/services/providerService.ts
index 155f206..98f9403 100644
--- a/frontend/src/services/providerService.ts
+++ b/frontend/src/services/providerService.ts
@@ -15,7 +15,7 @@ function toProvider(provider: ApiProviderConfig): ProviderConfig {
     enabled: provider.enabled,
     capabilities: capabilityMap(provider.capabilities),
     credential_id: provider.credential_id ?? undefined,
-    has_credential: Boolean(provider.credential_id) || provider.provider_type === 'mock',
+    has_credential: Boolean(provider.credential_id),
   }
 }
 
@@ -25,7 +25,7 @@ function toModel(model: ApiModelInfo): ModelInfo {
 
 export async function listProviders(): Promise<ProviderConfig[]> {
   const response = await apiClient.get<{ items: ApiProviderConfig[] }>('/api/providers')
-  return response.items.map(toProvider)
+  return response.items.filter(provider => provider.provider_type !== 'mock').map(toProvider)
 }
 
 export async function getProvider(providerId: string): Promise<ProviderConfig> {
@@ -97,102 +97,3 @@ export async function testProvider(providerId: string): Promise<TestResult> {
     return { success: false, error_code: e.code || 'TEST_FAILED', error_message: e.message }
   }
 }
-
-export const mockProviders: ProviderConfig[] = [
-  {
-    provider_id: 'mock',
-    provider_type: 'mock',
-    name: 'Mock Provider (测试)',
-    default_model: 'mock-1',
-    enabled: true,
-    has_credential: true,
-    capabilities: {
-      chat: true,
-      tool_calling: true,
-      streaming: true,
-      vision: false,
-      reasoning: false,
-      structured_output: true,
-      embedding: false,
-    },
-  },
-  {
-    provider_id: 'openai-compat-1',
-    provider_type: 'openai_compatible',
-    name: 'OpenAI 兼容服务',
-    base_url: 'https://api.openai.com/v1',
-    default_model: 'gpt-4o-mini',
-    enabled: true,
-    has_credential: true,
-    capabilities: {
-      chat: true,
-      tool_calling: true,
-      streaming: true,
-      vision: true,
-      reasoning: false,
-      structured_output: true,
-      embedding: true,
-    },
-  },
-  {
-    provider_id: 'ollama-local',
-    provider_type: 'ollama',
-    name: 'Ollama (本地)',
-    base_url: 'http://127.0.0.1:11434',
-    default_model: 'qwen2.5:7b',
-    enabled: false,
-    has_credential: false,
-    capabilities: {
-      chat: true,
-      tool_calling: false,
-      streaming: true,
-      vision: false,
-      reasoning: false,
-      structured_output: false,
-      embedding: true,
-    },
-  },
-]
-
-export const mockModels: Record<string, ModelInfo[]> = {
-  mock: [
-    {
-      model_id: 'mock-1',
-      name: 'Mock Model v1',
-      capabilities: { chat: true, tool_calling: true, streaming: true, structured_output: true },
-      context_window: 8192,
-    },
-  ],
-  'openai-compat-1': [
-    {
-      model_id: 'gpt-4o-mini',
-      name: 'GPT-4o Mini',
-      capabilities: { chat: true, tool_calling: true, streaming: true, vision: true, structured_output: true },
-      context_window: 128000,
-    },
-    {
-      model_id: 'gpt-4o',
-      name: 'GPT-4o',
-      capabilities: { chat: true, tool_calling: true, streaming: true, vision: true, structured_output: true, reasoning: true },
-      context_window: 128000,
-    },
-    {
-      model_id: 'text-embedding-3-small',
-      name: 'Text Embedding 3 Small',
-      capabilities: { embedding: true },
-    },
-  ],
-  'ollama-local': [
-    {
-      model_id: 'qwen2.5:7b',
-      name: 'Qwen 2.5 7B',
-      capabilities: { chat: true, streaming: true },
-      context_window: 32768,
-    },
-    {
-      model_id: 'bge-m3',
-      name: 'BGE M3',
-      capabilities: { embedding: true },
-    },
-  ],
-}
diff --git a/frontend/src/services/searchService.ts b/frontend/src/services/searchService.ts
index 81758b5..6fa70fa 100644
--- a/frontend/src/services/searchService.ts
+++ b/frontend/src/services/searchService.ts
@@ -35,69 +35,3 @@ export async function search(request: SearchRequest): Promise<{
     mode: response.mode,
   }
 }
-
-export async function searchMock(
-  query: string,
-  mode: 'fts' | 'vector' | 'hybrid' = 'hybrid'
-): Promise<{
-  results: SearchResult[]
-  total: number
-  mode: 'fts' | 'vector' | 'hybrid'
-}> {
-  await new Promise((r) => setTimeout(r, 300))
-  if (!query.trim()) return { results: [], total: 0, mode }
-  const results: SearchResult[] = [
-    {
-      block_id: 'b1',
-      note_id: 'n-rbt',
-      note_title: '红黑树',
-      file_path: '/数据结构/红黑树.md',
-      heading_path: '数据结构 / 红黑树 / 插入操作',
-      snippet: '插入后可能破坏红黑性质，需要通过变色和旋转来修复...',
-      score: 0.95,
-      match_type: 'hybrid',
-      tags: ['数据结构', '树'],
-    },
-    {
-      block_id: 'b2',
-      note_id: 'n-rbt',
-      note_title: '红黑树',
-      file_path: '/数据结构/红黑树.md',
-      heading_path: '数据结构 / 红黑树 / 性质',
-      snippet: '红黑树是一种自平衡二叉搜索树，每个节点带有颜色属性（红或黑）...',
-      score: 0.87,
-      match_type: 'fts',
-      tags: ['数据结构'],
-    },
-    {
-      block_id: 'b3',
-      note_id: 'n-bst',
-      note_title: '二叉搜索树',
-      file_path: '/数据结构/二叉搜索树.md',
-      heading_path: '数据结构 / 二叉搜索树 / 基本操作',
-      snippet: '二叉搜索树的插入需要先找到合适的位置，再添加新节点...',
-      score: 0.72,
-      match_type: 'vector',
-      tags: ['数据结构', '树'],
-    },
-    {
-      block_id: 'b4',
-      note_id: 'n-deadlock',
-      note_title: '死锁',
-      file_path: '/操作系统/死锁.md',
-      heading_path: '操作系统 / 死锁 / 必要条件',
-      snippet: '死锁的四个必要条件：互斥、占有并等待、不可抢占、循环等待...',
-      score: 0.45,
-      match_type: 'vector',
-      tags: ['操作系统'],
-    },
-  ]
-  const filtered = results.filter(
-    (r) =>
-      r.note_title.includes(query) ||
-      r.snippet.includes(query) ||
-      r.heading_path.includes(query) ||
-      query.length > 1
-  )
-  return { results: filtered, total: filtered.length, mode }
-}
diff --git a/frontend/src/services/skillService.ts b/frontend/src/services/skillService.ts
index 2683546..644b515 100644
--- a/frontend/src/services/skillService.ts
+++ b/frontend/src/services/skillService.ts
@@ -42,77 +42,3 @@ export async function disableSkill(skillId: string): Promise<Skill> {
 export async function uninstallSkill(skillId: string): Promise<OperationResponse> {
   return apiClient.delete(`/api/skills/${skillId}`)
 }
-
-export const mockSkills: Skill[] = [
-  {
-    skill_id: 'exam-review',
-    name: '期末复习助手',
-    version: '1.0.0',
-    description: '根据课程笔记生成复习要点和练习题，帮助高效备考',
-    icon: '',
-    author: 'NotesAgent 团队',
-    permissions: ['notes.search', 'notes.read', 'tasks.create'],
-    tools: ['notes.search', 'notes.read', 'tasks.create'],
-    retrieval_config: { top_k: 10, rerank: true, citation: true },
-    model_requirements: { capabilities: ['chat', 'tool_calling'] },
-    status: 'ready',
-    enabled: true,
-  },
-  {
-    skill_id: 'meeting-summary',
-    name: '会议纪要生成',
-    version: '1.1.0',
-    description: '从音频或文本中提取会议要点、行动项和待办任务',
-    icon: '',
-    author: 'NotesAgent 团队',
-    permissions: ['notes.search', 'notes.write', 'tasks.write', 'attachments.read'],
-    tools: ['notes.search', 'notes.create', 'tasks.create', 'attachments.read'],
-    retrieval_config: { top_k: 5, rerank: false, citation: true },
-    model_requirements: { capabilities: ['chat', 'tool_calling', 'structured_output'] },
-    status: 'ready',
-    enabled: true,
-  },
-  {
-    skill_id: 'code-explainer',
-    name: '代码解读助手',
-    version: '0.9.0',
-    description: '分析代码片段，解释功能、复杂度和优化建议',
-    icon: '',
-    author: '社区贡献',
-    permissions: ['notes.search', 'notes.read'],
-    tools: ['notes.search', 'notes.read', 'rag.search'],
-    retrieval_config: { top_k: 8, rerank: true, citation: true },
-    model_requirements: { capabilities: ['chat', 'tool_calling'] },
-    status: 'installed',
-    enabled: false,
-  },
-  {
-    skill_id: 'research-assistant',
-    name: '文献研究助手',
-    version: '1.2.0',
-    description: '自动整理文献笔记，生成研究综述和引用关系图',
-    icon: '',
-    author: '社区贡献',
-    permissions: ['notes.search', 'notes.read', 'notes.write'],
-    tools: ['notes.search', 'notes.read', 'notes.create', 'rag.search'],
-    retrieval_config: { top_k: 15, rerank: true, citation: true },
-    model_requirements: { capabilities: ['chat', 'tool_calling', 'reasoning'] },
-    status: 'dependency_missing',
-    enabled: false,
-    missing_dependencies: ['文献引用插件', '知识图谱插件'],
-  },
-  {
-    skill_id: 'language-tutor',
-    name: '语言学习助手',
-    version: '0.5.0',
-    description: '基于你的学习笔记生成语言练习和记忆卡片',
-    icon: '',
-    author: '社区贡献',
-    permissions: ['notes.search', 'notes.read', 'tasks.create'],
-    tools: ['notes.search', 'notes.read', 'tasks.create'],
-    retrieval_config: { top_k: 6, rerank: false, citation: false },
-    model_requirements: { capabilities: ['chat'] },
-    status: 'ready',
-    enabled: true,
-  },
-]
diff --git a/frontend/src/services/systemService.ts b/frontend/src/services/systemService.ts
index 5672e68..2ee4b0e 100644
--- a/frontend/src/services/systemService.ts
+++ b/frontend/src/services/systemService.ts
@@ -1,23 +1,14 @@
 import apiClient from './apiClient'
 import type { SystemStatus } from '@/contracts'
 
-export async function healthCheck(): Promise<{ status: string }> {
-  try {
-    return await apiClient.get<{ status: string }>('/health')
-  } catch {
-    return { status: 'unavailable' }
-  }
+export function healthCheck(): Promise<{ status: string }> {
+  return apiClient.get('/health')
 }
 
-export async function getStatus(): Promise<SystemStatus> {
-  try {
-    return await apiClient.get<SystemStatus>('/api/status')
-  } catch {
-    return {
-      status: 'ok',
-      name: 'notes-agent',
-      version: '0.1.0',
-      environment: import.meta.env.DEV ? 'development' : 'production',
-    }
-  }
+export function getStatus(): Promise<SystemStatus> {
+  return apiClient.get('/api/status')
+}
+
+export function getPermissionPolicy(): Promise<Record<string, 'allow' | 'confirm' | 'deny'>> {
+  return apiClient.get('/api/permissions/policy')
 }
diff --git a/frontend/src/services/taskService.ts b/frontend/src/services/taskService.ts
index 53cc31a..8893281 100644
--- a/frontend/src/services/taskService.ts
+++ b/frontend/src/services/taskService.ts
@@ -1,5 +1,5 @@
 import apiClient from './apiClient'
-import type { ApiTask, OperationResponse, PageMeta, TaskItem, TaskStatus, TaskPriority } from '@/contracts'
+import type { ApiTask, OperationResponse, PageMeta, TaskItem, TaskStatus } from '@/contracts'
 
 function toTask(task: ApiTask): TaskItem {
   return {
@@ -7,10 +7,8 @@ function toTask(task: ApiTask): TaskItem {
     title: task.title,
     description: task.description,
     status: task.status,
-    priority: 'medium',
     due_date: task.due_at ?? undefined,
     note_id: task.note_id ?? undefined,
-    source: 'user',
     created_at: task.created_at,
     updated_at: task.updated_at,
   }
@@ -60,67 +58,3 @@ export async function updateTask(
 export async function deleteTask(taskId: string): Promise<OperationResponse> {
   return apiClient.delete(`/api/tasks/${taskId}`)
 }
-
-export const mockTasks: TaskItem[] = [
-  {
-    task_id: 't-1',
-    title: '完成红黑树章节复习',
-    description: '整理插入、删除操作的所有情况，准备期末复习',
-    status: 'todo',
-    priority: 'high',
-    due_date: '2026-08-30T23:59:00Z',
-    note_id: 'n-rbt',
-    note_title: '红黑树',
-    source: 'user',
-    created_at: '2026-08-20T10:00:00Z',
-    updated_at: '2026-08-25T14:30:00Z',
-  },
-  {
-    task_id: 't-2',
-    title: '理解死锁的银行家算法',
-    description: '推导银行家算法的安全性检查过程',
-    status: 'in_progress',
-    priority: 'medium',
-    note_id: 'n-deadlock',
-    note_title: '死锁',
-    source: 'agent',
-    created_at: '2026-08-22T09:00:00Z',
-    updated_at: '2026-08-24T16:00:00Z',
-  },
-  {
-    task_id: 't-3',
-    title: 'TCP 三次握手与四次挥手',
-    description: '',
-    status: 'done',
-    priority: 'high',
-    note_id: 'n-tcp',
-    note_title: 'TCP_IP',
-    source: 'user',
-    created_at: '2026-08-15T08:00:00Z',
-    updated_at: '2026-08-18T20:00:00Z',
-  },
-  {
-    task_id: 't-4',
-    title: 'HTTP 状态码整理',
-    description: '整理常见 HTTP 状态码及含义',
-    status: 'todo',
-    priority: 'low',
-    note_id: 'n-http',
-    note_title: 'HTTP协议',
-    source: 'note',
-    created_at: '2026-08-10T10:00:00Z',
-    updated_at: '2026-08-10T10:00:00Z',
-  },
-  {
-    task_id: 't-5',
-    title: '链表操作实现练习',
-    description: '实现单链表和双向链表的基本操作',
-    status: 'todo',
-    priority: 'medium',
-    note_id: 'n-slist',
-    note_title: '单链表',
-    source: 'agent',
-    created_at: '2026-08-23T11:00:00Z',
-    updated_at: '2026-08-23T11:00:00Z',
-  },
-]
diff --git a/frontend/src/stores/agent.ts b/frontend/src/stores/agent.ts
index 4b2aae5..cc2c219 100644
--- a/frontend/src/stores/agent.ts
+++ b/frontend/src/stores/agent.ts
@@ -1,21 +1,21 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import type { AgentRun, AgentEvent, ToolDefinition, PermissionRequest, ToolCall } from '@/contracts'
-import { mockAgentRuns, mockAgentEvents, mockTools, mockPermissionRequest } from '@/services/agentService'
 import * as agentService from '@/services/agentService'
 import type { SseClient } from '@/services/sseClient'
 
 export const useAgentStore = defineStore('agent', () => {
-  const runs = ref<AgentRun[]>(mockAgentRuns)
-  const activeRunId = ref<string | null>('run-1')
-  const events = ref<AgentEvent[]>(mockAgentEvents.filter((e) => e.run_id === 'run-1'))
-  const tools = ref<ToolDefinition[]>(mockTools)
+  const runs = ref<AgentRun[]>([])
+  const activeRunId = ref<string | null>(null)
+  const events = ref<AgentEvent[]>([])
+  const tools = ref<ToolDefinition[]>([])
   const isCreating = ref(false)
   const isRunning = ref(false)
   const permissionRequest = ref<PermissionRequest | null>(null)
   const toolCalls = ref<ToolCall[]>([])
   const error = ref<string | null>(null)
   let eventStream: SseClient | null = null
+  let selectionVersion = 0
 
   const activeRun = computed(() =>
     runs.value.find((r) => r.run_id === activeRunId.value) || null
@@ -40,9 +40,15 @@ export const useAgentStore = defineStore('agent', () => {
   }
 
   async function loadRun(runId: string) {
+    const version = ++selectionVersion
     eventStream?.cancel()
     activeRunId.value = runId
+    events.value = []
+    toolCalls.value = []
+    permissionRequest.value = null
+    isRunning.value = false
     const run = await agentService.getAgentRun(runId)
+    if (version !== selectionVersion) return
     const existingIndex = runs.value.findIndex((item) => item.run_id === runId)
     if (existingIndex >= 0) runs.value[existingIndex] = run
     else runs.value.unshift(run)
@@ -106,9 +112,9 @@ export const useAgentStore = defineStore('agent', () => {
     isRunning.value = true
     error.value = null
     eventStream = agentService.streamAgentEvents(runId, {
-      onEvent: processEvent,
-      onError(streamError) { error.value = streamError.message; isRunning.value = false },
-      onDone() { isRunning.value = false; eventStream = null },
+      onEvent(event) { if (activeRunId.value === runId) processEvent(event) },
+      onError(streamError) { if (activeRunId.value === runId) { error.value = streamError.message; isRunning.value = false } },
+      onDone() { if (activeRunId.value === runId) { isRunning.value = false; eventStream = null } },
     })
   }
 
@@ -116,6 +122,7 @@ export const useAgentStore = defineStore('agent', () => {
     isCreating.value = true
     try {
       const run = await agentService.createAgentRun(request)
+      selectionVersion++
       runs.value.unshift(run)
       activeRunId.value = run.run_id
       events.value = []
@@ -143,10 +150,6 @@ export const useAgentStore = defineStore('agent', () => {
     permissionRequest.value = null
   }
 
-  function showPermissionDemo() {
-    permissionRequest.value = mockPermissionRequest
-  }
-
   return {
     runs,
     activeRunId,
@@ -166,6 +169,5 @@ export const useAgentStore = defineStore('agent', () => {
     createRun,
     cancelRun,
     respondPermission,
-    showPermissionDemo,
   }
 })
diff --git a/frontend/src/stores/chat.spec.ts b/frontend/src/stores/chat.spec.ts
new file mode 100644
index 0000000..fd550ea
--- /dev/null
+++ b/frontend/src/stores/chat.spec.ts
@@ -0,0 +1,43 @@
+import { beforeEach, expect, it, vi } from 'vitest'
+import { createPinia, setActivePinia } from 'pinia'
+import { useChatStore } from './chat'
+import { streamChat } from '@/services/chatService'
+import type { SseClient } from '@/services/sseClient'
+
+vi.mock('@/services/chatService', () => ({ streamChat: vi.fn() }))
+beforeEach(() => {
+  setActivePinia(createPinia())
+  vi.mocked(streamChat).mockReset().mockReturnValue({ cancel: vi.fn() } as unknown as SseClient)
+})
+
+it('sends real user history, applies streaming changes, and restores it when switching conversations', async () => {
+  const store = useChatStore()
+  store.selectedProviderId = 'real'
+  store.selectedModel = 'configured-model'
+  await store.sendMessage('user input')
+  const [request, handlers] = vi.mocked(streamChat).mock.calls[0]!
+  expect(request.messages).toEqual([{ role: 'user', content: 'user input' }])
+  handlers.onEvent?.({ event: 'TextDelta', sequence: 0, timestamp: '', data: { text: 'real response' } })
+  expect(store.messages[1]?.content).toBe('real response')
+  handlers.onDone?.()
+  const id = store.activeConversationId!
+  store.createNewConversation()
+  expect(store.messages).toEqual([])
+  await store.setActiveConversation(id)
+  expect(store.messages.map(m => m.content)).toEqual(['user input', 'real response'])
+})
+
+it('does not send without a provider and ignores late callbacks from a cancelled conversation', async () => {
+  const store = useChatStore()
+  await store.sendMessage('no provider')
+  expect(streamChat).not.toHaveBeenCalled()
+  store.selectedProviderId = 'real'
+  store.selectedModel = 'configured-model'
+  await store.sendMessage('first')
+  const old = vi.mocked(streamChat).mock.calls[0]![1]
+  store.createNewConversation()
+  await store.sendMessage('second')
+  old.onDone?.()
+  expect(store.isStreaming).toBe(true)
+  expect(store.messages[0]?.content).toBe('second')
+})
diff --git a/frontend/src/stores/chat.ts b/frontend/src/stores/chat.ts
index fc511a6..fd599c3 100644
--- a/frontend/src/stores/chat.ts
+++ b/frontend/src/stores/chat.ts
@@ -1,22 +1,24 @@
 import { defineStore } from 'pinia'
-import { ref, computed } from 'vue'
+import { ref, computed, reactive } from 'vue'
 import type { ChatMessage, Conversation } from '@/contracts'
-import { mockConversations, mockMessages, streamChat } from '@/services/chatService'
+import { streamChat } from '@/services/chatService'
 import type { SseClient } from '@/services/sseClient'
 
 export const useChatStore = defineStore('chat', () => {
-  const conversations = ref<Conversation[]>(mockConversations)
-  const activeConversationId = ref<string | null>('conv-1')
-  const messages = ref<ChatMessage[]>(mockMessages['conv-1'] || [])
+  const conversations = ref<Conversation[]>([])
+  const activeConversationId = ref<string | null>(null)
+  const messages = ref<ChatMessage[]>([])
   const isStreaming = ref(false)
   const inputText = ref('')
-  const useRag = ref(true)
+  const useRag = ref(false)
   const selectedSkillId = ref<string | null>(null)
-  const selectedProviderId = ref('mock')
-  const selectedModel = ref('mock-1')
+  const selectedProviderId = ref('')
+  const selectedModel = ref('')
   let sseClient: SseClient | null = null
+  let streamVersion = 0
 
-  // TODO(chat): 会话持久化接口完成后移除 mockConversations/mockMessages 数据源。
+  // User-created conversations live in this browser session; no fabricated history.
+  const history = reactive<Record<string, ChatMessage[]>>({})
 
   const activeConversation = computed(() =>
     conversations.value.find((c) => c.conversation_id === activeConversationId.value) || null
@@ -27,13 +29,14 @@ export const useChatStore = defineStore('chat', () => {
   )
 
   async function setActiveConversation(id: string) {
+    stopGeneration()
     activeConversationId.value = id
-    messages.value = mockMessages[id] || []
+    messages.value = history[id] ?? []
   }
 
   async function sendMessage(text: string) {
-    if (!text.trim() || isStreaming.value) return
-    const conversationId = activeConversationId.value || `conv-${Date.now()}`
+    if (!text.trim() || isStreaming.value || !selectedProviderId.value || !selectedModel.value) return
+    const conversationId = activeConversationId.value || crypto.randomUUID()
 
     if (!activeConversationId.value) {
       const newConv: Conversation = {
@@ -47,8 +50,10 @@ export const useChatStore = defineStore('chat', () => {
       activeConversationId.value = conversationId
     }
 
+    history[conversationId] = messages.value
+    const conversationMessages = messages.value
     const userMsg: ChatMessage = {
-      message_id: `msg-${Date.now()}`,
+      message_id: crypto.randomUUID(),
       conversation_id: conversationId,
       role: 'user',
       content: text,
@@ -57,29 +62,34 @@ export const useChatStore = defineStore('chat', () => {
     messages.value.push(userMsg)
     inputText.value = ''
     isStreaming.value = true
+    const conversation = conversations.value.find(c => c.conversation_id === conversationId)
+    if (conversation) { conversation.updated_at = new Date().toISOString(); conversation.message_count = messages.value.length }
 
     // 先插入占位消息，随后将 SSE 增量原位合并，避免每个 token 重建消息列表。
-    const aiMsg: ChatMessage = {
-      message_id: `msg-${Date.now() + 1}`,
+    const aiMsg = reactive<ChatMessage>({
+      message_id: crypto.randomUUID(),
       conversation_id: conversationId,
       role: 'assistant',
       content: '',
       created_at: new Date().toISOString(),
       citations: [],
       tool_calls: [],
-    }
+    })
     messages.value.push(aiMsg)
 
+    const version = ++streamVersion
+    const argumentBuffers = new Map<string, string>()
     sseClient = streamChat({
       provider_id: selectedProviderId.value,
       model: selectedModel.value,
       conversation_id: conversationId,
       use_rag: useRag.value,
       messages: messages.value
-        .filter((message) => message !== aiMsg)
+        .filter((message) => message.message_id !== aiMsg.message_id)
         .map((message) => ({ role: message.role, content: message.content })),
     }, {
       onEvent(event) {
+        if (version !== streamVersion) return
         if (event.event === 'TextDelta') aiMsg.content += String(event.data.text ?? '')
         if (event.event === 'ThinkingDelta') aiMsg.thinking = `${aiMsg.thinking ?? ''}${String(event.data.text ?? '')}`
         if (event.event === 'ToolCallStart') {
@@ -92,6 +102,11 @@ export const useChatStore = defineStore('chat', () => {
         }
         if (event.event === 'ToolCallDelta') {
           const call = aiMsg.tool_calls?.find((item) => item.tool_call_id === event.data.tool_call_id)
+          if (call && typeof event.data.arguments_delta === 'string') {
+            const buffer = (argumentBuffers.get(call.tool_call_id) ?? '') + event.data.arguments_delta
+            argumentBuffers.set(call.tool_call_id, buffer)
+            try { call.parameters = JSON.parse(buffer) } catch { /* incomplete JSON fragment */ }
+          }
           if (call && event.data.arguments && typeof event.data.arguments === 'object') {
             Object.assign(call.parameters, event.data.arguments)
           }
@@ -116,14 +131,16 @@ export const useChatStore = defineStore('chat', () => {
         if (event.event === 'Error') aiMsg.content += `\n\n生成失败：${String(event.data.message ?? '未知错误')}`
       },
       onError(error) {
+        if (version !== streamVersion) return
         aiMsg.content += `\n\n连接失败：${error.message}`
         isStreaming.value = false
         sseClient = null
       },
       onDone() {
+        if (version !== streamVersion) return
         const conversation = conversations.value.find((item) => item.conversation_id === conversationId)
         if (conversation) {
-          conversation.message_count = messages.value.length
+          conversation.message_count = conversationMessages.length
           conversation.updated_at = new Date().toISOString()
         }
         isStreaming.value = false
@@ -133,6 +150,7 @@ export const useChatStore = defineStore('chat', () => {
   }
 
   function stopGeneration() {
+    streamVersion++
     if (sseClient) {
       sseClient.cancel()
       sseClient = null
@@ -141,8 +159,9 @@ export const useChatStore = defineStore('chat', () => {
   }
 
   function createNewConversation() {
+    stopGeneration()
     const newConv: Conversation = {
-      conversation_id: `conv-${Date.now()}`,
+      conversation_id: crypto.randomUUID(),
       title: '新对话',
       created_at: new Date().toISOString(),
       updated_at: new Date().toISOString(),
@@ -150,16 +169,19 @@ export const useChatStore = defineStore('chat', () => {
     }
     conversations.value.unshift(newConv)
     activeConversationId.value = newConv.conversation_id
-    messages.value = []
+    history[newConv.conversation_id] = []
+    messages.value = history[newConv.conversation_id]
   }
 
   function deleteConversation(id: string) {
+    if (activeConversationId.value === id) stopGeneration()
+    delete history[id]
     const idx = conversations.value.findIndex((c) => c.conversation_id === id)
     if (idx > -1) {
       conversations.value.splice(idx, 1)
       if (activeConversationId.value === id) {
         activeConversationId.value = conversations.value[0]?.conversation_id || null
-        messages.value = conversations.value[0] ? mockMessages[conversations.value[0].conversation_id] || [] : []
+        messages.value = conversations.value[0] ? history[conversations.value[0].conversation_id] || [] : []
       }
     }
   }
diff --git a/frontend/src/stores/liveData.spec.ts b/frontend/src/stores/liveData.spec.ts
new file mode 100644
index 0000000..f8413f9
--- /dev/null
+++ b/frontend/src/stores/liveData.spec.ts
@@ -0,0 +1,67 @@
+// @vitest-environment happy-dom
+import { beforeEach, afterEach, describe, expect, it, vi } from 'vitest'
+import { createPinia, setActivePinia } from 'pinia'
+import { useAgentStore } from './agent'
+import { useChatStore } from './chat'
+import { useTaskStore } from './task'
+import { usePluginStore } from './plugin'
+import { useSkillStore } from './skill'
+import { useProviderStore } from './provider'
+import { useSettingsStore } from './settings'
+import { listProviders } from '@/services/providerService'
+import { getStatus } from '@/services/systemService'
+
+beforeEach(() => { setActivePinia(createPinia()); localStorage.clear() })
+afterEach(() => vi.unstubAllGlobals())
+
+describe('runtime data sources', () => {
+  it('starts with no fabricated domain records or healthy diagnostics', () => {
+    expect(useAgentStore().runs).toEqual([])
+    expect(useAgentStore().events).toEqual([])
+    expect(useAgentStore().tools).toEqual([])
+    expect(useAgentStore().permissionRequest).toBeNull()
+    expect(useChatStore().conversations).toEqual([])
+    expect(useChatStore().messages).toEqual([])
+    expect(useTaskStore().tasks).toEqual([])
+    expect(usePluginStore().plugins).toEqual([])
+    expect(useSkillStore().skills).toEqual([])
+    expect(useProviderStore().providers).toEqual([])
+    expect(useProviderStore().defaultProviderId).toBe('')
+    expect(useSettingsStore().aiCoreStatus).toBe('unknown')
+    expect(useSettingsStore().indexStatus.total_notes).toBeNull()
+    expect(useSettingsStore().permissionPolicy).toEqual({})
+  })
+
+  it('keeps initial collections empty and exposes errors when the API is offline', async () => {
+    vi.stubGlobal('fetch', vi.fn().mockRejectedValue(new Error('offline')))
+    const stores = [useTaskStore(), usePluginStore(), useSkillStore(), useProviderStore()] as const
+    await Promise.all([stores[0].loadTasks(), stores[1].loadPlugins(), stores[2].loadSkills(), stores[3].loadProviders()])
+    expect(stores.every(store => store.error)).toBe(true)
+    await useSettingsStore().loadDiagnostics()
+    expect(useSettingsStore().aiCoreStatus).toBe('error')
+    expect(useSettingsStore().indexStatus.total_blocks).toBeNull()
+    expect(useSettingsStore().diagnosticsError).toBeTruthy()
+    await expect(getStatus()).rejects.toThrow()
+  })
+
+  it('renders backend counts and effective permissions and excludes the test provider', async () => {
+    const data: Record<string, unknown> = {
+      '/health': { status: 'ok' }, '/api/status': { version: '9.2.1' },
+      '/api/index/status': { status: 'idle', pending_jobs: 0, total_notes: 7, total_blocks: 19 },
+      '/api/permissions/policy': { 'attachments.read': 'allow' },
+      '/api/providers': { items: [
+        { provider_id: 'mock', provider_type: 'mock', capabilities: [] },
+        { provider_id: 'real', name: 'Real', provider_type: 'ollama', capabilities: [], enabled: true, default_model: 'installed-model' },
+      ] },
+    }
+    vi.stubGlobal('fetch', vi.fn(async (url: string) => new Response(JSON.stringify(data[url]), { status: 200, headers: { "content-type": "application/json" } })))
+    expect((await listProviders()).map(p => p.provider_id)).toEqual(['real'])
+    await useProviderStore().loadProviders()
+    expect(useProviderStore().defaultProviderId).toBe('real')
+    await useSettingsStore().loadDiagnostics()
+    expect(useSettingsStore().indexStatus.total_notes).toBe(7)
+    expect(useSettingsStore().indexStatus.total_blocks).toBe(19)
+    expect(useSettingsStore().aiCoreVersion).toBe('9.2.1')
+    expect(useSettingsStore().permissionPolicy).toEqual({ 'attachments.read': 'allow' })
+  })
+})
diff --git a/frontend/src/stores/plugin.ts b/frontend/src/stores/plugin.ts
index 7e742e7..49f94ce 100644
--- a/frontend/src/stores/plugin.ts
+++ b/frontend/src/stores/plugin.ts
@@ -4,7 +4,7 @@ import type { Plugin } from '@/contracts'
 import * as pluginService from '@/services/pluginService'
 
 export const usePluginStore = defineStore('plugin', () => {
-  const plugins = ref<Plugin[]>(pluginService.mockPlugins)
+  const plugins = ref<Plugin[]>([])
   const selectedPluginId = ref<string | null>(null)
   const isLoading = ref(false)
   const error = ref<string | null>(null)
diff --git a/frontend/src/stores/provider.spec.ts b/frontend/src/stores/provider.spec.ts
index f4388e1..fe6ffc6 100644
--- a/frontend/src/stores/provider.spec.ts
+++ b/frontend/src/stores/provider.spec.ts
@@ -4,8 +4,6 @@ import { createPinia, setActivePinia } from 'pinia'
 import type { ProviderConfig, ProviderPreset } from '@/contracts'
 
 vi.mock('@/services/providerService', () => ({
-  mockProviders: [],
-  mockModels: {},
   listProviders: vi.fn(),
   listProviderPresets: vi.fn(),
   getCredentialStatus: vi.fn(),
diff --git a/frontend/src/stores/provider.ts b/frontend/src/stores/provider.ts
index b097fe0..a7f8276 100644
--- a/frontend/src/stores/provider.ts
+++ b/frontend/src/stores/provider.ts
@@ -1,17 +1,17 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import type { ProviderConfig, ModelInfo, ProviderPreset } from '@/contracts'
-import { createProvider, deleteProvider as deleteProviderRequest, getCredentialStatus, listModels, listProviderPresets, listProviders, mockProviders, mockModels, putCredential, testProvider as testProviderRequest, updateProvider as updateProviderRequest } from '@/services/providerService'
+import { createProvider, deleteProvider as deleteProviderRequest, getCredentialStatus, listModels, listProviderPresets, listProviders, putCredential, testProvider as testProviderRequest, updateProvider as updateProviderRequest } from '@/services/providerService'
 import { ApiErrorClass } from '@/services/apiClient'
 
 export const useProviderStore = defineStore('provider', () => {
-  const providers = ref<ProviderConfig[]>(mockProviders)
+  const providers = ref<ProviderConfig[]>([])
   const presets = ref<ProviderPreset[]>([])
-  const modelsByProvider = ref<Record<string, ModelInfo[]>>(mockModels)
+  const modelsByProvider = ref<Record<string, ModelInfo[]>>({})
   const modelLoadingByProvider = ref<Record<string, boolean>>({})
   const modelErrorsByProvider = ref<Record<string, string>>({})
   const credentialConfiguredById = ref<Record<string, boolean>>({})
-  const defaultProviderId = ref('mock')
+  const defaultProviderId = ref('')
   const isLoading = ref(false)
   const error = ref<string | null>(null)
 
@@ -24,6 +24,9 @@ export const useProviderStore = defineStore('provider', () => {
     isLoading.value = true
     try {
       providers.value = await listProviders()
+      if (!enabledProviders.value.some(p => p.provider_id === defaultProviderId.value)) {
+        defaultProviderId.value = enabledProviders.value[0]?.provider_id ?? ''
+      }
       error.value = null
     } catch (reason) {
       error.value = reason instanceof Error ? reason.message : 'Provider 加载失败'
diff --git a/frontend/src/stores/settings.ts b/frontend/src/stores/settings.ts
index b2fce1c..db1cdc8 100644
--- a/frontend/src/stores/settings.ts
+++ b/frontend/src/stores/settings.ts
@@ -1,7 +1,8 @@
 import { defineStore } from 'pinia'
 import { ref, watch } from 'vue'
 import type { AiCoreStatus, IndexStatus } from '@/contracts'
-import { mockIndexStatus } from '@/services/indexService'
+import { resolveApiUrl } from '@/services/apiClient'
+import packageInfo from '../../package.json'
 import * as indexService from '@/services/indexService'
 import * as systemService from '@/services/systemService'
 
@@ -14,8 +15,8 @@ export const useSettingsStore = defineStore('settings', () => {
   const restoreLastVault = ref(saved.restoreLastVault !== false)
   const autoSaveInterval = ref(typeof saved.autoSaveInterval === 'number' ? saved.autoSaveInterval : 1500)
   const language = ref<'zh-CN' | 'en'>(saved.language === 'en' ? 'en' : 'zh-CN')
-  const appVersion = ref('0.1.0')
-  const aiCoreVersion = ref('0.1.0')
+  const appVersion = ref(packageInfo.version)
+  const aiCoreVersion = ref('未获取')
 
   // Editor
   const defaultEditorMode = ref<'wysiwyg' | 'source'>(saved.defaultEditorMode === 'source' ? 'source' : 'wysiwyg')
@@ -23,24 +24,15 @@ export const useSettingsStore = defineStore('settings', () => {
   const spellCheck = ref(saved.spellCheck === true)
 
   // AI Core
-  const aiCoreStatus = ref<AiCoreStatus>('running')
-  const aiCoreAddress = ref('http://127.0.0.1:8000')
+  const aiCoreStatus = ref<AiCoreStatus>('unknown')
+  const aiCoreAddress = ref(resolveApiUrl('/api') || '/api')
 
   // Index
-  const indexStatus = ref<IndexStatus>(mockIndexStatus)
+  const emptyIndex = (): IndexStatus => ({ status: 'unknown', pending_jobs: 0, total_notes: null, total_blocks: null })
+  const indexStatus = ref<IndexStatus>(emptyIndex())
 
   // Permissions
-  const permissionPolicy = ref<Record<string, 'allow' | 'confirm' | 'deny'>>({
-    'notes.read': 'allow',
-    'notes.search': 'allow',
-    'notes.write': 'confirm',
-    'notes.delete': 'confirm',
-    'tasks.read': 'allow',
-    'tasks.write': 'confirm',
-    'attachments.read': 'confirm',
-    'network.request': 'confirm',
-    'secrets.use': 'confirm',
-  })
+  const permissionPolicy = ref<Record<string, 'allow' | 'confirm' | 'deny'>>({})
   const diagnosticsError = ref<string | null>(null)
 
   watch(() => ({
@@ -50,18 +42,15 @@ export const useSettingsStore = defineStore('settings', () => {
   }), (value) => localStorage.setItem('app-settings', JSON.stringify(value)), { deep: true })
 
   async function loadDiagnostics() {
-    try {
-      const [health, status, index] = await Promise.all([
-        systemService.healthCheck(), systemService.getStatus(), indexService.getIndexStatus(),
-      ])
-      aiCoreStatus.value = health.status === 'ok' ? 'running' : 'error'
-      aiCoreVersion.value = status.version
-      indexStatus.value = index
-      diagnosticsError.value = null
-    } catch (reason) {
-      aiCoreStatus.value = 'error'
-      diagnosticsError.value = reason instanceof Error ? reason.message : '诊断信息加载失败'
-    }
+    const results = await Promise.allSettled([
+      systemService.healthCheck(), systemService.getStatus(), indexService.getIndexStatus(), systemService.getPermissionPolicy(),
+    ])
+    const [health, status, index, policy] = results
+    aiCoreStatus.value = health.status === 'fulfilled' && health.value.status === 'ok' ? 'running' : 'error'
+    aiCoreVersion.value = status.status === 'fulfilled' ? status.value.version : '未获取'
+    indexStatus.value = index.status === 'fulfilled' ? index.value : emptyIndex()
+    permissionPolicy.value = policy.status === 'fulfilled' ? policy.value : {}
+    diagnosticsError.value = results.filter(item => item.status === 'rejected').map(item => item.reason instanceof Error ? item.reason.message : '后端请求失败').join('；') || null
   }
 
   function setAutoSaveInterval(ms: number) {
@@ -72,21 +61,6 @@ export const useSettingsStore = defineStore('settings', () => {
     defaultEditorMode.value = mode
   }
 
-  function setPermission(permission: string, policy: 'allow' | 'confirm' | 'deny') {
-    permissionPolicy.value[permission] = policy
-  }
-
-  function setAiCoreStatus(status: AiCoreStatus) {
-    aiCoreStatus.value = status
-  }
-
-  async function restartAiCore(): Promise<boolean> {
-    aiCoreStatus.value = 'starting'
-    await new Promise((r) => setTimeout(r, 1500))
-    aiCoreStatus.value = 'running'
-    return true
-  }
-
   async function rebuildIndex(scope: 'full' | 'fts' | 'vector' = 'full') {
     indexStatus.value.status = 'indexing'
     try {
@@ -115,9 +89,6 @@ export const useSettingsStore = defineStore('settings', () => {
     loadDiagnostics,
     setAutoSaveInterval,
     setDefaultEditorMode,
-    setPermission,
-    setAiCoreStatus,
-    restartAiCore,
     rebuildIndex,
   }
 })
diff --git a/frontend/src/stores/skill.ts b/frontend/src/stores/skill.ts
index 8aed4b3..5f712b3 100644
--- a/frontend/src/stores/skill.ts
+++ b/frontend/src/stores/skill.ts
@@ -4,7 +4,7 @@ import type { Skill } from '@/contracts'
 import * as skillService from '@/services/skillService'
 
 export const useSkillStore = defineStore('skill', () => {
-  const skills = ref<Skill[]>(skillService.mockSkills)
+  const skills = ref<Skill[]>([])
   const selectedSkillId = ref<string | null>(null)
   const isLoading = ref(false)
   const error = ref<string | null>(null)
diff --git a/frontend/src/stores/task.ts b/frontend/src/stores/task.ts
index 8a36250..3f20c15 100644
--- a/frontend/src/stores/task.ts
+++ b/frontend/src/stores/task.ts
@@ -1,10 +1,10 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import type { TaskItem, TaskStatus, TaskPriority, TaskSource } from '@/contracts'
-import { createTask as createTaskRequest, deleteTask as deleteTaskRequest, listTasks, mockTasks, updateTask as updateTaskRequest } from '@/services/taskService'
+import { createTask as createTaskRequest, deleteTask as deleteTaskRequest, listTasks, updateTask as updateTaskRequest } from '@/services/taskService'
 
 export const useTaskStore = defineStore('task', () => {
-  const tasks = ref<TaskItem[]>(mockTasks)
+  const tasks = ref<TaskItem[]>([])
   const filterStatus = ref<TaskStatus | 'all'>('all')
   const filterPriority = ref<TaskPriority | 'all'>('all')
   const filterSource = ref<TaskSource | 'all'>('all')
@@ -47,7 +47,7 @@ export const useTaskStore = defineStore('task', () => {
     const task = tasks.value.find((t) => t.task_id === taskId)
     if (task) {
       const updated = await updateTaskRequest(taskId, data)
-      Object.assign(task, updated, data)
+      Object.assign(task, updated)
     }
   }