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/runtime/browser.go

@@ -0,0 +1,11 @@
+package runtime
+
+import (
+	"context"
+)
+
+// BrowserOpenURL uses the system default browser to open the url
+func BrowserOpenURL(ctx context.Context, url string) {
+	appFrontend := getFrontend(ctx)
+	appFrontend.BrowserOpenURL(url)
+}