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/go-webview2/webviewloader/find_dll_installed.go

@@ -0,0 +1,94 @@
+//go:build windows && !native_webview2loader
+
+package webviewloader
+
+import (
+	"path/filepath"
+
+	"golang.org/x/sys/windows/registry"
+)
+
+const (
+	kNumChannels              = 4
+	kInstallKeyPath           = "Software\\Microsoft\\EdgeUpdate\\ClientState\\"
+	kMinimumCompatibleVersion = "86.0.616.0"
+)
+
+var (
+	kChannelName = [kNumChannels]string{
+		"", "beta", "dev", "canary", // "internal"
+	}
+
+	kChannelUuid = [kNumChannels]string{
+		"{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}",
+		"{2CD8A007-E189-409D-A2C8-9AF4EF3C72AA}",
+		"{0D50BFEC-CD6A-4F9A-964C-C7416E3ACB10}",
+		"{65C35B14-6C1D-4122-AC46-7148CC9D6497}",
+		//"{BE59E8FD-089A-411B-A3B0-051D9E417818}",
+	}
+
+	minimumCompatibleVersion, _ = parseVersion(kMinimumCompatibleVersion)
+)
+
+func findInstalledClientDll(preferCanary bool) (clientPath string, version *version, err error) {
+	for i := 0; i < kNumChannels; i++ {
+		channel := i
+		if preferCanary {
+			channel = (kNumChannels - 1) - i
+		}
+
+		key := kInstallKeyPath + kChannelUuid[channel]
+		for _, checkSystem := range []bool{true, false} {
+			clientPath, version, err := findInstalledClientDllForChannel(key, checkSystem)
+			if err == errNoClientDLLFound {
+				continue
+			}
+			if err != nil {
+				return "", nil, err
+			}
+
+			version.channel = kChannelName[channel]
+			return clientPath, version, nil
+		}
+	}
+	return "", nil, errNoClientDLLFound
+}
+
+func findInstalledClientDllForChannel(subKey string, system bool) (clientPath string, clientVersion *version, err error) {
+	key := registry.LOCAL_MACHINE
+	if !system {
+		key = registry.CURRENT_USER
+	}
+
+	regKey, err := registry.OpenKey(key, subKey, registry.READ|registry.WOW64_32KEY)
+	if err != nil {
+		return "", nil, mapFindErr(err)
+	}
+	defer regKey.Close()
+
+	embeddedEdgeSubFolder, _, err := regKey.GetStringValue("EBWebView")
+	if err != nil {
+		return "", nil, mapFindErr(err)
+	}
+
+	if embeddedEdgeSubFolder == "" {
+		return "", nil, errNoClientDLLFound
+	}
+
+	versionString := filepath.Base(embeddedEdgeSubFolder)
+	version, err := parseVersion(versionString)
+	if err != nil {
+		return "", nil, errNoClientDLLFound
+	}
+
+	if version.compare(minimumCompatibleVersion) < 0 {
+		return "", nil, errNoClientDLLFound
+	}
+
+	dllPath, err := findEmbeddedClientDll(embeddedEdgeSubFolder)
+	if err != nil {
+		return "", nil, mapFindErr(err)
+	}
+
+	return dllPath, &version, nil
+}