feat(extension): 浏览器插件 P1 MVP

新建 BillNote_extension/ 工作空间（基于 vitesse-webext 骨架，Vue 3 + Vite + UnoCSS + MV3）。

P1 MVP 范围：
- popup：自动读当前 tab URL，识别 Bilibili / YouTube / 抖音 / 快手；提交 /generate_note 后轮询 /task_status；展示 markdown，复制 + 下载 .md
- options：后端地址输入与连通性测试；从 /get_all_providers + /get_models_by_provider 拉供应商/模型列表；默认画质、截图/跳转、笔记风格
- chrome.storage.local 持久化设置与最近 30 个任务，popup 重开恢复进行中任务
- markdown 里的 /static/screenshots 路径在渲染前重写为绝对地址

后端：CORS 改用 regex，新增允许 chrome-extension:// 与 moz-extension:// 源（同时保留 localhost / 127.0.0.1 / tauri.localhost）。无新增 backend endpoint。

P2-P4（content script 悬浮按钮、cookie 直通、side panel、思维导图、RAG 问答）保留 stub 文件，不在本次范围。

去掉 vitesse-webext 自带的 simple-git-hooks postinstall 配置——它会在仓库根装 pre-commit 钩子去跑 pnpm lint-staged，但仓库根没有 package.json，会破坏所有提交流。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

BillNote_extension/src/popup/Popup.vue

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+<script setup lang="ts">
+import { computed, onMounted, onUnmounted, ref } from 'vue'
+import { detectPlatform } from '~/logic/platform'
+import { settings, settingsReady, tasks, tasksReady, upsertTask } from '~/logic/storage'
+import { generateNote, getTaskStatus } from '~/logic/api'
+import type { TaskRecord } from '~/logic/types'
+
+const tabUrl = ref<string>('')
+const tabTitle = ref<string>('')
+const platform = computed(() => detectPlatform(tabUrl.value))
+const supported = computed(() => platform.value !== null)
+
+const submitting = ref(false)
+const errorMsg = ref('')
+const activeTaskId = ref<string>('')
+const activeTask = computed<TaskRecord | undefined>(() => tasks.value?.find(t => t.taskId === activeTaskId.value))
+
+let pollTimer: ReturnType<typeof setTimeout> | null = null
+
+async function loadActiveTab() {
+  try {
+    const [tab] = await browser.tabs.query({ active: true, currentWindow: true })
+    tabUrl.value = tab?.url ?? ''
+    tabTitle.value = tab?.title ?? ''
+  }
+  catch (e) {
+    console.warn('无法读取当前 tab:', e)
+  }
+}
+
+async function poll(taskId: string) {
+  try {
+    const res = await getTaskStatus(taskId)
+    upsertTask({
+      taskId,
+      videoUrl: activeTask.value?.videoUrl ?? tabUrl.value,
+      platform: (activeTask.value?.platform ?? platform.value)!,
+      status: res.status,
+      message: res.message,
+      createdAt: activeTask.value?.createdAt ?? Date.now(),
+      updatedAt: Date.now(),
+      result: res.result ?? activeTask.value?.result,
+    })
+    if (res.status !== 'SUCCESS' && res.status !== 'FAILED')
+      pollTimer = setTimeout(() => poll(taskId), 3000)
+  }
+  catch (e) {
+    errorMsg.value = (e as Error).message
+    pollTimer = setTimeout(() => poll(taskId), 5000)
+  }
+}
+
+async function start() {
+  errorMsg.value = ''
+  if (!supported.value) {
+    errorMsg.value = '当前页面不是支持的视频链接'
+    return
+  }
+  if (!settings.value.providerId || !settings.value.modelName) {
+    errorMsg.value = '请先去设置页选择供应商和模型'
+    return
+  }
+  submitting.value = true
+  try {
+    const { task_id } = await generateNote({
+      video_url: tabUrl.value,
+      platform: platform.value!,
+      quality: settings.value.quality,
+      provider_id: settings.value.providerId,
+      model_name: settings.value.modelName,
+      screenshot: settings.value.screenshot,
+      link: settings.value.link,
+      style: settings.value.style || undefined,
+      format: [
+        ...(settings.value.screenshot ? ['screenshot'] : []),
+        ...(settings.value.link ? ['link'] : []),
+      ],
+    })
+    activeTaskId.value = task_id
+    upsertTask({
+      taskId: task_id,
+      videoUrl: tabUrl.value,
+      platform: platform.value!,
+      status: 'PENDING',
+      message: '已提交',
+      createdAt: Date.now(),
+      updatedAt: Date.now(),
+    })
+    poll(task_id)
+  }
+  catch (e) {
+    errorMsg.value = (e as Error).message
+  }
+  finally {
+    submitting.value = false
+  }
+}
+
+function openOptions() {
+  browser.runtime.openOptionsPage()
+}
+
+function selectTask(id: string) {
+  activeTaskId.value = id
+  const t = tasks.value?.find(x => x.taskId === id)
+  if (t && t.status !== 'SUCCESS' && t.status !== 'FAILED')
+    poll(id)
+}
+
+onMounted(async () => {
+  await Promise.all([settingsReady, tasksReady])
+  await loadActiveTab()
+  // 如果有进行中的任务，恢复轮询
+  const running = tasks.value?.find(t => t.status !== 'SUCCESS' && t.status !== 'FAILED')
+  if (running) {
+    activeTaskId.value = running.taskId
+    poll(running.taskId)
+  }
+})
+
+onUnmounted(() => {
+  if (pollTimer)
+    clearTimeout(pollTimer)
+})
+</script>
+
+<template>
+  <main class="w-[400px] p-3 text-sm text-gray-800 flex flex-col gap-3 bg-white">
+    <header class="flex items-center justify-between">
+      <div class="flex items-center gap-2">
+        <span class="font-semibold text-base">BiliNote</span>
+        <PlatformBadge :platform="platform" />
+      </div>
+      <button class="text-xs text-gray-500 hover:text-gray-800" @click="openOptions">设置</button>
+    </header>
+
+    <div class="text-xs text-gray-500 truncate" :title="tabUrl">
+      {{ tabUrl || '当前没有打开的标签页' }}
+    </div>
+
+    <div v-if="!supported" class="text-xs text-amber-700 bg-amber-50 p-2 rounded">
+      当前页面不是 BiliNote 支持的视频链接（Bilibili / YouTube / Douyin / Kuaishou）
+    </div>
+
+    <fieldset class="border rounded p-2 flex flex-col gap-2" :disabled="!supported || submitting">
+      <div class="grid grid-cols-3 gap-2 text-xs">
+        <label class="flex flex-col gap-1">
+          <span class="text-gray-600">画质</span>
+          <select v-model="settings.quality" class="border rounded px-1 py-0.5">
+            <option value="fast">快速</option>
+            <option value="medium">中等</option>
+            <option value="slow">高质</option>
+          </select>
+        </label>
+        <label class="flex items-center gap-1 mt-4">
+          <input v-model="settings.screenshot" type="checkbox"> 截图
+        </label>
+        <label class="flex items-center gap-1 mt-4">
+          <input v-model="settings.link" type="checkbox"> 跳转
+        </label>
+      </div>
+
+      <div class="text-xs text-gray-600">
+        <span v-if="settings.providerId && settings.modelName">
+          模型：{{ settings.modelName }}
+        </span>
+        <span v-else class="text-amber-700">
+          ⚠ 未选择供应商/模型，
+          <button class="underline" @click="openOptions">去设置</button>
+        </span>
+      </div>
+
+      <button class="btn-primary" :disabled="!supported || submitting || !settings.providerId" @click="start">
+        {{ submitting ? '提交中…' : '生成笔记' }}
+      </button>
+    </fieldset>
+
+    <div v-if="errorMsg" class="text-xs text-red-600 break-words">
+      {{ errorMsg }}
+    </div>
+
+    <section v-if="activeTask" class="flex flex-col gap-2">
+      <TaskProgress :status="activeTask.status" :message="activeTask.message" />
+      <MarkdownView
+        v-if="activeTask.status === 'SUCCESS' && activeTask.result?.markdown"
+        :markdown="activeTask.result.markdown"
+        :title="activeTask.result.audio_meta?.title || tabTitle"
+      />
+    </section>
+
+    <details v-if="(tasks?.length ?? 0) > 0" class="text-xs">
+      <summary class="cursor-pointer text-gray-500">最近任务（{{ tasks!.length }}）</summary>
+      <ul class="mt-1 flex flex-col gap-1 max-h-32 overflow-auto">
+        <li
+          v-for="t in tasks"
+          :key="t.taskId"
+          class="flex justify-between items-center gap-2 px-1 py-0.5 rounded hover:bg-gray-100 cursor-pointer"
+          :class="{ 'bg-blue-50': t.taskId === activeTaskId }"
+          @click="selectTask(t.taskId)"
+        >
+          <span class="truncate flex-1" :title="t.videoUrl">{{ t.result?.audio_meta?.title || t.videoUrl }}</span>
+          <span class="text-gray-500">{{ t.status }}</span>
+        </li>
+      </ul>
+    </details>
+  </main>
+</template>
+
+<style>
+.btn-primary { @apply bg-blue-600 text-white px-3 py-1.5 rounded hover:bg-blue-700 disabled:bg-gray-400 disabled:cursor-not-allowed text-sm; }
+.btn-secondary { @apply bg-gray-100 text-gray-700 px-2 py-1 rounded hover:bg-gray-200 text-xs; }
+</style>

BillNote_extension/src/popup/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <base target="_blank">
+  <title>Popup</title>
+</head>
+<body style="min-width: 100px">
+  <div id="app"></div>
+  <script type="module" src="./main.ts"></script>
+</body>
+</html>

BillNote_extension/src/popup/main.ts

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+import { createApp } from 'vue'
+import App from './Popup.vue'
+import { setupApp } from '~/logic/common-setup'
+import '../styles'
+
+const app = createApp(App)
+setupApp(app)
+app.mount('#app')