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/assetserver/common.go

@@ -0,0 +1,135 @@
+package assetserver
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/assetserver"
+	"golang.org/x/net/html"
+)
+
+func BuildAssetServerConfig(appOptions *options.App) (assetserver.Options, error) {
+	var options assetserver.Options
+	if opt := appOptions.AssetServer; opt != nil {
+		if appOptions.Assets != nil || appOptions.AssetsHandler != nil {
+			panic("It's not possible to use the deprecated Assets and AssetsHandler options and the new AssetServer option at the same time. Please migrate all your Assets options to the AssetServer option.")
+		}
+
+		options = *opt
+	} else {
+		options = assetserver.Options{
+			Assets:  appOptions.Assets,
+			Handler: appOptions.AssetsHandler,
+		}
+	}
+
+	return options, options.Validate()
+}
+
+const (
+	HeaderHost          = "Host"
+	HeaderContentType   = "Content-Type"
+	HeaderContentLength = "Content-Length"
+	HeaderUserAgent     = "User-Agent"
+	HeaderCacheControl  = "Cache-Control"
+	HeaderUpgrade       = "Upgrade"
+
+	WailsUserAgentValue = "wails.io"
+)
+
+func serveFile(rw http.ResponseWriter, filename string, blob []byte) error {
+	header := rw.Header()
+	header.Set(HeaderContentLength, strconv.Itoa(len(blob)))
+	if mimeType := header.Get(HeaderContentType); mimeType == "" {
+		mimeType = GetMimetype(filename, blob)
+		header.Set(HeaderContentType, mimeType)
+	}
+
+	rw.WriteHeader(http.StatusOK)
+	_, err := io.Copy(rw, bytes.NewReader(blob))
+	return err
+}
+
+func createScriptNode(scriptName string) *html.Node {
+	return &html.Node{
+		Type: html.ElementNode,
+		Data: "script",
+		Attr: []html.Attribute{
+			{
+				Key: "src",
+				Val: scriptName,
+			},
+		},
+	}
+}
+
+func createDivNode(id string) *html.Node {
+	return &html.Node{
+		Type: html.ElementNode,
+		Data: "div",
+		Attr: []html.Attribute{
+			{
+				Namespace: "",
+				Key:       "id",
+				Val:       id,
+			},
+		},
+	}
+}
+
+func insertScriptInHead(htmlNode *html.Node, scriptName string) error {
+	headNode := findFirstTag(htmlNode, "head")
+	if headNode == nil {
+		return errors.New("cannot find head in HTML")
+	}
+	scriptNode := createScriptNode(scriptName)
+	if headNode.FirstChild != nil {
+		headNode.InsertBefore(scriptNode, headNode.FirstChild)
+	} else {
+		headNode.AppendChild(scriptNode)
+	}
+	return nil
+}
+
+func appendSpinnerToBody(htmlNode *html.Node) error {
+	bodyNode := findFirstTag(htmlNode, "body")
+	if bodyNode == nil {
+		return errors.New("cannot find body in HTML")
+	}
+	scriptNode := createDivNode("wails-spinner")
+	bodyNode.AppendChild(scriptNode)
+	return nil
+}
+
+func getHTMLNode(htmldata []byte) (*html.Node, error) {
+	return html.Parse(bytes.NewReader(htmldata))
+}
+
+func findFirstTag(htmlnode *html.Node, tagName string) *html.Node {
+	var extractor func(*html.Node) *html.Node
+	var result *html.Node
+	extractor = func(node *html.Node) *html.Node {
+		if node.Type == html.ElementNode && node.Data == tagName {
+			return node
+		}
+		for child := node.FirstChild; child != nil; child = child.NextSibling {
+			result := extractor(child)
+			if result != nil {
+				return result
+			}
+		}
+		return nil
+	}
+	result = extractor(htmlnode)
+	return result
+}
+
+func isWebSocket(req *http.Request) bool {
+	upgrade := req.Header.Get(HeaderUpgrade)
+	return strings.EqualFold(upgrade, "websocket")
+}