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/wv2installer/wv2installer.go

@@ -0,0 +1,60 @@
+//go:build windows
+
+package wv2installer
+
+import (
+	"fmt"
+
+	"github.com/wailsapp/go-webview2/webviewloader"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/windows"
+)
+
+const MinimumRuntimeVersion string = "94.0.992.31" // WebView2 SDK 1.0.992.28
+
+type installationStatus int
+
+const (
+	needsInstalling installationStatus = iota
+	needsUpdating
+)
+
+func Process(appoptions *options.App) (string, error) {
+	messages := windows.DefaultMessages()
+	if appoptions.Windows != nil && appoptions.Windows.Messages != nil {
+		messages = appoptions.Windows.Messages
+	}
+
+	installStatus := needsInstalling
+
+	// Override version check for manually specified webview path if present
+	var webviewPath = ""
+	if opts := appoptions.Windows; opts != nil && opts.WebviewBrowserPath != "" {
+		webviewPath = opts.WebviewBrowserPath
+	}
+
+	installedVersion, err := webviewloader.GetAvailableCoreWebView2BrowserVersionString(webviewPath)
+	if err != nil {
+		return "", err
+	}
+
+	if installedVersion != "" {
+		installStatus = needsUpdating
+		compareResult, err := webviewloader.CompareBrowserVersions(installedVersion, MinimumRuntimeVersion)
+		if err != nil {
+			return "", err
+		}
+		updateRequired := compareResult < 0
+		// Installed and does not require updating
+		if !updateRequired {
+			return installedVersion, nil
+		}
+	}
+
+	// Force error strategy if webview is manually specified
+	if webviewPath != "" {
+		return installedVersion, fmt.Errorf(messages.InvalidFixedWebview2)
+	}
+
+	return installedVersion, doInstallationStrategy(installStatus, messages)
+}