fix: sync WebK compatibility paths

internal/compat/tdesktop/config.go

@@ -14,7 +14,7 @@ import (
 // （记录于 docs/compatibility-matrix.md）。
 func BuildConfig(dc int, ip string, port int, now time.Time, publicBaseURL string) *tg.Config {
 	meURLPrefix := links.NormalizeBaseURL(publicBaseURL) + "/"
-	return &tg.Config{
+	config := &tg.Config{
 		Date:     int(now.Unix()),
 		Expires:  int(now.Add(time.Hour).Unix()),
 		TestMode: false,
@@ -55,6 +55,8 @@ func BuildConfig(dc int, ip string, port int, now time.Time, publicBaseURL strin
 		MessageLengthMax:     4096,
 		WebfileDCID:          dc,
 	}
+	config.SetReactionsDefault(&tg.ReactionEmoji{Emoticon: DefaultReactionEmoticon})
+	return config
 }
 
 // NearestDC 构造 help.getNearestDc 返回值。

internal/compat/tdesktop/config_test.go

@@ -0,0 +1,20 @@
+package tdesktop
+
+import (
+	"testing"
+	"time"
+
+	"github.com/iamxvbaba/td/tg"
+)
+
+func TestBuildConfigIncludesDefaultReaction(t *testing.T) {
+	config := BuildConfig(2, "127.0.0.1", 2398, time.Unix(1, 0), "https://telesrv.net")
+	reaction, ok := config.GetReactionsDefault()
+	if !ok {
+		t.Fatal("reactions_default is absent")
+	}
+	emoji, ok := reaction.(*tg.ReactionEmoji)
+	if !ok || emoji.Emoticon != DefaultReactionEmoticon {
+		t.Fatalf("reactions_default = %#v, want %q emoji", reaction, DefaultReactionEmoticon)
+	}
+}

internal/compat/tdesktop/startup_stubs.go

@@ -194,7 +194,7 @@ func UniqueGiftChatThemes(hash int64) tg.AccountChatThemesClass {
 	}
 }
 
-// WallPapers returns the read-only Default wallpaper catalog. User wallpaper
+// WallPapers returns the read-only default wallpaper catalog. User wallpaper
 // upload/save/install remains outside the current TDesktop compatibility scope.
 func WallPapers(hash int64) tg.AccountWallPapersClass {
 	if hash == wallPapersHash {
@@ -256,13 +256,17 @@ func DefaultGroupPhotoEmojis() tg.EmojiListClass {
 const availableReactionsHash = 20260602
 const emptyStickerSetHash = 20260602
 
+// DefaultReactionEmoticon is the account fallback used by config and the
+// built-in available-reactions catalog.
+const DefaultReactionEmoticon = "\U0001f44d"
+
 type defaultReaction struct {
 	emoticon string
 	title    string
 }
 
 var defaultAvailableReactions = []defaultReaction{
-	{emoticon: "\U0001f44d", title: "Thumbs Up"},
+	{emoticon: DefaultReactionEmoticon, title: "Thumbs Up"},
 	{emoticon: "\u2764\ufe0f", title: "Red Heart"},
 	{emoticon: "\U0001f602", title: "Face With Tears of Joy"},
 	{emoticon: "\U0001f62e", title: "Face With Open Mouth"},