feat: FFmpeg GUI desktop application

Wails v2 + Vue3 + Go project with:
- Encode/Remux/Subtitle burn with hardware acceleration
- Real-time progress with ffmpeg stderr parsing (\r delimiter handling)
- Task queue with cancel support
- Per-task log viewer with color-coded output
- Custom frameless window with resize support
- Dark/light theme toggle
- Hardware encoder detection (NVENC/QSV/AMF)

main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"embed"
+	"log"
+
+	"github.com/wailsapp/wails/v2"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/assetserver"
+)
+
+//go:embed frontend/dist
+var assets embed.FS
+
+func main() {
+	app := NewApp()
+
+	err := wails.Run(&options.App{
+		Frameless: true,
+		Title:     "FFmpeg GUI",
+		Width:     1100,
+		Height:    750,
+		MinWidth:  800,
+		MinHeight: 600,
+		AssetServer: &assetserver.Options{
+			Assets: assets,
+		},
+		OnStartup:  app.startup,
+		OnShutdown: app.shutdown,
+		Bind: []any{
+			app,
+		},
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+}