Initial commit: 译泡 PopLingo v1.0.0

AI 划词翻译 Chrome 扩展（Manifest V3）：
- 支持 DeepSeek/OpenAI/Kimi/智谱/通义/Gemini/Claude/Ollama 等 10 种服务商
- 流式输出、左右分栏对照、原文一键展开收起
- 划词图标/自动翻译/Alt+T 快捷键/右键菜单四种触发方式

popup/popup.html

@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8" />
+  <link rel="stylesheet" href="popup.css" />
+</head>
+<body>
+  <header class="head">
+    <div class="brand">
+      <img src="../icons/icon32.png" alt="" width="22" height="22" />
+      <div>
+        <h1>译泡 PopLingo</h1>
+        <span id="statusText" class="status">已开启</span>
+      </div>
+    </div>
+    <label class="switch">
+      <input type="checkbox" id="enabledToggle" />
+      <span class="slider"></span>
+    </label>
+  </header>
+
+  <section class="provider">
+    <div class="row">
+      <span class="label">服务商</span>
+      <span id="providerName" class="value">DeepSeek</span>
+    </div>
+    <div class="row">
+      <span class="label">模型</span>
+      <span id="modelName" class="value mono">deepseek-chat</span>
+    </div>
+    <div class="row" id="keyRow">
+      <span class="label">API Key</span>
+      <span id="keyStatus" class="value warn">未配置</span>
+    </div>
+  </section>
+
+  <section class="form">
+    <label class="field">
+      <span>目标语言</span>
+      <select id="targetLang"></select>
+    </label>
+    <label class="field">
+      <span>触发方式</span>
+      <select id="triggerMode">
+        <option value="icon">划词后点图标</option>
+        <option value="auto">划词后自动翻译</option>
+        <option value="shortcut">仅快捷键 Alt+T</option>
+      </select>
+    </label>
+  </section>
+
+  <footer class="foot">
+    <button id="openOptions" class="btn primary">⚙ 模型设置</button>
+    <span class="hint">选中文字试试 · Esc 关闭弹窗</span>
+  </footer>
+
+  <script src="popup.js"></script>
+</body>
+</html>