Switch remote deploy to vendored source builds

Move remote deployment to a vendored source bundle built on the target host via Docker so redeploys no longer require local cross-compilation or host Go installation.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

vendor/github.com/wailsapp/wails/v2/internal/app/app.go

@@ -0,0 +1,45 @@
+package app
+
+import (
+	"context"
+
+	"github.com/wailsapp/wails/v2/internal/frontend"
+	"github.com/wailsapp/wails/v2/internal/logger"
+	"github.com/wailsapp/wails/v2/internal/menumanager"
+	"github.com/wailsapp/wails/v2/pkg/menu"
+	"github.com/wailsapp/wails/v2/pkg/options"
+)
+
+// App defines a Wails application structure
+type App struct {
+	frontend frontend.Frontend
+	logger   *logger.Logger
+	options  *options.App
+
+	menuManager *menumanager.Manager
+
+	// Indicates if the app is in debug mode
+	debug bool
+
+	// Indicates if the devtools is enabled
+	devtoolsEnabled bool
+
+	// OnStartup/OnShutdown
+	startupCallback  func(ctx context.Context)
+	shutdownCallback func(ctx context.Context)
+	ctx              context.Context
+}
+
+// Shutdown the application
+func (a *App) Shutdown() {
+	if a.frontend != nil {
+		a.frontend.Quit()
+	}
+}
+
+// SetApplicationMenu sets the application menu
+func (a *App) SetApplicationMenu(menu *menu.Menu) {
+	if a.frontend != nil {
+		a.frontend.MenuSetApplicationMenu(menu)
+	}
+}