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/application/init.go

@@ -0,0 +1,8 @@
+//go:build !windows
+// +build !windows
+
+package application
+
+func applicationInit() error {
+	return nil
+}