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

manifest.json

@@ -0,0 +1,63 @@
+{
+  "manifest_version": 3,
+  "name": "译泡 · PopLingo — AI 划词翻译",
+  "version": "1.0.0",
+  "description": "划词即译的大模型翻译气泡：DeepSeek / OpenAI / Kimi / 智谱 / 通义 / Gemini / Claude / Ollama，流式输出。",
+  "minimum_chrome_version": "116",
+  "permissions": [
+    "storage",
+    "contextMenus",
+    "commands"
+  ],
+  "host_permissions": [
+    "<all_urls>"
+  ],
+  "background": {
+    "service_worker": "background.js"
+  },
+  "content_scripts": [
+    {
+      "matches": [
+        "http://*/*",
+        "https://*/*",
+        "file://*/*"
+      ],
+      "js": [
+        "content/content.js"
+      ],
+      "css": [
+        "content/content.css"
+      ],
+      "run_at": "document_idle",
+      "all_frames": true,
+      "match_about_blank": true
+    }
+  ],
+  "action": {
+    "default_popup": "popup/popup.html",
+    "default_icon": {
+      "16": "icons/icon16.png",
+      "32": "icons/icon32.png",
+      "48": "icons/icon48.png",
+      "128": "icons/icon128.png"
+    }
+  },
+  "options_ui": {
+    "page": "options/options.html",
+    "open_in_tab": true
+  },
+  "icons": {
+    "16": "icons/icon16.png",
+    "32": "icons/icon32.png",
+    "48": "icons/icon48.png",
+    "128": "icons/icon128.png"
+  },
+  "commands": {
+    "translate-selection": {
+      "suggested_key": {
+        "default": "Alt+T"
+      },
+      "description": "翻译当前选中的文本"
+    }
+  }
+}