🐛 fix(app): 修复供应商预设识别并兼容Wails开发模式资源加载

- 抽离供应商预设匹配逻辑，避免自定义 OpenAI 端点误识别为千问 Coding Plan
- 调整 AI 设置弹窗的预设回填逻辑，并补充预设识别回归测试
- 通过 dev/prod build tag 拆分前端资源装配，避免开发模式依赖 frontend/dist

main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"context"
-	"embed"
 
 	aiservice "GoNavi-Wails/internal/ai/service"
 	"GoNavi-Wails/internal/app"
@@ -15,9 +14,6 @@ import (
 	"github.com/wailsapp/wails/v2/pkg/options/windows"
 )
 
-//go:embed all:frontend/dist
-var assets embed.FS
-
 func main() {
 	// Create an instance of the app structure
 	application := app.NewApp()