refactor: 项目正式更名为 FrpcPilot，同步更新所有相关标识

本次修改将项目名称从 Frpilot 全面更改为 FrpcPilot，涉及：
- 应用名称、窗口标题、系统托盘提示、GitHub 仓库地址
- 包标识：npm 包名、Rust crate 名称、Tauri identifier
- 本地存储键前缀、数据库文件名、系统托盘 ID
- 文档、国际化文案、配置文件、代码注释等所有关联内容

src-tauri/tauri.conf.json

@@ -1,8 +1,8 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
-  "productName": "Frpilot",
+  "productName": "FrpcPilot",
   "version": "../package.json",
-  "identifier": "Frpilot",
+  "identifier": "FrpcPilot",
   "build": {
     "beforeDevCommand": "pnpm dev",
     "devUrl": "http://localhost:1420",
@@ -12,7 +12,7 @@
   "app": {
     "windows": [
       {
-        "title": "Frpilot",
+        "title": "FrpcPilot",
         "width": 1100,
         "height": 720,
         "minWidth": 900,
@@ -42,8 +42,8 @@
       "active": true,
       "dialog": false,
       "endpoints": [
-        "https://ghproxy.net/https://github.com/SparksFly91/Frpilot/releases/latest/download/latest.json",
-        "https://github.com/SparksFly91/Frpilot/releases/latest/download/latest.json"
+        "https://ghproxy.net/https://github.com/SparksFly91/FrpcPilot/releases/latest/download/latest.json",
+        "https://github.com/SparksFly91/FrpcPilot/releases/latest/download/latest.json"
       ],
       "pubkey": "dW50cnVzdGVkIGNvbW1lbnQ6IG1pbmlzaWduIHB1YmxpYyBrZXk6IEU0REVGMTREODFFOTI2MUEKUldRYUp1bUJUZkhlNU1qRmlPQm5xSmdQd24waFltVmNtTjlUallYVmdva1VGNkp5bTVGcVlsZUgK"
     }