v1.7.0: 新增私信评论区用户（wbi签名+永久按mid去重+2~4分钟间隔）、安装统计上报、有新版本提示

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "B站评论助手",
-  "version": "1.6.6",
+  "version": "1.7.0",
   "description": "B站网页版关键词评论助手：按搜索关键词找视频，默认模拟真人（打开视频页、滚到评论区、逐字输入、点发布），也可快速API直发；支持下载当前页视频；带防重复记录、可中断执行与页面实时进度浮层。",
   "permissions": ["storage", "tabs", "scripting", "sidePanel", "downloads", "declarativeNetRequest"],
   "host_permissions": [