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/pkg/menu/contextmenu.go

@@ -0,0 +1,13 @@
+package menu
+
+type ContextMenu struct {
+	ID   string
+	Menu *Menu
+}
+
+func NewContextMenu(ID string, menu *Menu) *ContextMenu {
+	return &ContextMenu{
+		ID:   ID,
+		Menu: menu,
+	}
+}