rpc: add android login startup compat

(cherry picked from commit 53904e72f7c3b96e6ae5e24196d0e551fa8aebce)

docs/compatibility-matrix.md

@@ -96,6 +96,7 @@ status 取值：done(真实实现) / stub(兼容响应) / todo(已发现未实
 | auth.bindTempAuthKey | done | real-validated | 校验 encrypted bind_auth_key_inner（nonce/temp key/perm key/session/expires_at）后记录 temp_auth_key_bindings；后续 temp auth_key RPC 会解析为 perm auth_key 身份，并刷新 active session 的业务 auth_key_id / user_id 缓存 |
 | auth.exportLoginToken / auth.importLoginToken | stub | tdesktop-qr-placeholder | TDesktop QR 登录页轮询；当前单 DC 主路径只支持手机号登录，返回短期 auth.loginToken 避免未实现噪声；`auth.acceptLoginToken` 显式返回 `AUTH_TOKEN_INVALID`，不伪造跨设备 QR 授权 |
 | auth.exportAuthorization / auth.importAuthorization / auth.dropTempAuthKeys | stub | single-dc-bounded | 单 DC 当前不做跨 DC authorization handoff；export/import 返回 `DC_ID_INVALID`，dropTempAuthKeys 返回成功避免旧 temp key 清理路径噪声 |
+| auth.initPasskeyLogin | stub | empty-options | DrKLO Android 手机号页会后台预取 passkey 登录；当前不接 passkey，返回空 `auth.passkeyLoginOptions` 避免反复 NOT_IMPLEMENTED |
 | auth.sendCode / auth.resendCode / auth.cancelCode | done | dev-code | 开发固定验证码，phone_code_hash 存 Redis CodeStore；手机号统一规范为纯数字；resend 会校验并失效旧 hash 后生成新 hash，cancel 会删除 pending code |
 | auth.signIn | done | real+2fa-gate | 校验码；兼容 TDesktop sendCode 后 signIn 使用 DigitsOnly(phone)；无 2FA 时登录成功绑定在线 session 的 user_id，写入并延迟推送 777000 官方登录消息 updateNewMessage，同时向其它在线 session 推送新登录 updateServiceNotification；账号已启用 2FA 时返回 `SESSION_PASSWORD_NEEDED` 并等待 `auth.checkPassword` |
 | auth.signUp | done | real | 建 user + 绑定 authorization；登录成功绑定在线 session 的 user_id，写入并延迟推送 777000 官方登录消息 updateNewMessage |
@@ -399,9 +400,9 @@ outbox 多 worker 并发 + 发送事务乱序提交 → **主动推送可能乱
 
 | method | status | behavior | note |
 |---|---|---|---|
-| langpack.getLangPack | done | real | PG-backed；启动 seed `tdesktop_en/zh-hans_v12000000.strings` |
+| langpack.getLangPack | done | real+legacy-adapter | PG-backed；启动 seed `tdesktop_en/zh-hans_v12000000.strings`；DrKLO Android legacy `#9ab5c58e lang_code:string` 由 RPC edge 补 `lang_pack` 后复用当前实现 |
 | langpack.getDifference | done | real | 按 version 返回语言包差异；当前 seed 同版本全量 |
-| langpack.getStrings | done | real | 按 key 查询 PG 中的语言包字符串 |
+| langpack.getStrings | done | real+legacy-adapter | 按 key 查询 PG 中的语言包字符串；DrKLO Android legacy `#2e1ee318 lang_code:string keys:Vector<string>` 由 RPC edge 补 `lang_pack`，keys 上限 512 |
 | langpack.getLanguages | done | compat-static | Layer 225 `#42c6978f` 已注册；DrKLO Android 仍会发 legacy `#800fd57d` 无参版本，RPC edge 显式 adapter 后返回语言列表 |
 
 ## Files / Media / Photos

internal/mtprotoedge/encrypted.go

@@ -608,6 +608,7 @@ func clientMessageNeedsAck(typeID uint32) bool {
 	case proto.MessageContainerTypeID,
 		mt.MsgsAckTypeID,
 		mt.PingDelayDisconnectRequestTypeID,
+		mt.DestroySessionRequestTypeID,
 		mt.HTTPWaitRequestTypeID,
 		mt.BadMsgNotificationTypeID,
 		mt.BadServerSaltTypeID,

internal/rpc/auth.go

@@ -37,6 +37,9 @@ func (r *Router) registerAuth(d *tg.ServerDispatcher) {
 	d.OnAuthDropTempAuthKeys(func(ctx context.Context, exceptauthkeys []int64) (bool, error) {
 		return true, nil
 	})
+	d.OnAuthInitPasskeyLogin(func(ctx context.Context, req *tg.AuthInitPasskeyLoginRequest) (*tg.AuthPasskeyLoginOptions, error) {
+		return &tg.AuthPasskeyLoginOptions{Options: tg.DataJSON{Data: "{}"}}, nil
+	})
 	d.OnAuthSendCode(r.onAuthSendCode)
 	d.OnAuthResendCode(r.onAuthResendCode)
 	d.OnAuthCancelCode(r.onAuthCancelCode)

internal/rpc/compat.go

@@ -21,6 +21,12 @@ func (r *Router) dispatchCompat(ctx context.Context, b *bin.Buffer, id uint32) (
 	)
 
 	switch id {
+	case legacyLangpackGetLangPackTypeID:
+		name = "langpack.getLangPack#9ab5c58e"
+		enc, err = r.handleLegacyLangpackGetLangPack(ctx, b)
+	case legacyLangpackGetStringsTypeID:
+		name = "langpack.getStrings#2e1ee318"
+		enc, err = r.handleLegacyLangpackGetStrings(ctx, b)
 	case legacyLangpackGetLanguagesTypeID:
 		name = "langpack.getLanguages#800fd57d"
 		enc, err = r.handleLegacyLangpackGetLanguages(ctx, b)

internal/rpc/langpack.go

@@ -8,7 +8,13 @@ import (
 	"github.com/gotd/td/tg"
 )
 
-const legacyLangpackGetLanguagesTypeID uint32 = 0x800fd57d
+const (
+	legacyLangpackGetLangPackTypeID  uint32 = 0x9ab5c58e
+	legacyLangpackGetStringsTypeID   uint32 = 0x2e1ee318
+	legacyLangpackGetLanguagesTypeID uint32 = 0x800fd57d
+
+	maxLegacyLangpackStringKeys = 512
+)
 
 // registerLangpack 注册 langpack.* RPC handler。
 func (r *Router) registerLangpack(d *tg.ServerDispatcher) {
@@ -47,6 +53,59 @@ func (r *Router) registerLangpack(d *tg.ServerDispatcher) {
 	})
 }
 
+func (r *Router) handleLegacyLangpackGetLangPack(ctx context.Context, b *bin.Buffer) (bin.Encoder, error) {
+	if err := b.ConsumeID(legacyLangpackGetLangPackTypeID); err != nil {
+		return nil, err
+	}
+	langCode, err := b.String()
+	if err != nil {
+		return nil, err
+	}
+	langPack := langPackFromClient(ctx)
+	if r.deps.LangPack == nil {
+		return &tg.LangPackDifference{LangCode: langCode}, nil
+	}
+	pack, err := r.deps.LangPack.GetLangPack(ctx, langPack, langCode)
+	if err != nil {
+		return nil, internalErr()
+	}
+	return tgLangPackDifference(pack), nil
+}
+
+func (r *Router) handleLegacyLangpackGetStrings(ctx context.Context, b *bin.Buffer) (bin.Encoder, error) {
+	if err := b.ConsumeID(legacyLangpackGetStringsTypeID); err != nil {
+		return nil, err
+	}
+	langCode, err := b.String()
+	if err != nil {
+		return nil, err
+	}
+	headerLen, err := b.VectorHeader()
+	if err != nil {
+		return nil, err
+	}
+	if headerLen > maxLegacyLangpackStringKeys {
+		return nil, limitInvalidErr()
+	}
+	keys := make([]string, 0, headerLen)
+	for i := 0; i < headerLen; i++ {
+		key, err := b.String()
+		if err != nil {
+			return nil, err
+		}
+		keys = append(keys, key)
+	}
+	langPack := langPackFromClient(ctx)
+	if r.deps.LangPack == nil {
+		return &tg.LangPackStringClassVector{}, nil
+	}
+	pack, err := r.deps.LangPack.GetStrings(ctx, langPack, langCode, keys)
+	if err != nil {
+		return nil, internalErr()
+	}
+	return &tg.LangPackStringClassVector{Elems: tgLangPackStrings(pack.Strings)}, nil
+}
+
 func (r *Router) handleLegacyLangpackGetLanguages(ctx context.Context, b *bin.Buffer) (bin.Encoder, error) {
 	if err := b.ConsumeID(legacyLangpackGetLanguagesTypeID); err != nil {
 		return nil, err

internal/rpc/langpack_compat_test.go

@@ -34,6 +34,51 @@ func TestLangpackGetLanguagesCurrentAndLegacy(t *testing.T) {
 	})
 }
 
+func TestLegacyLangpackGetLangPack(t *testing.T) {
+	r := New(Config{DC: 2, IP: "127.0.0.1", Port: 2398}, Deps{}, zaptest.NewLogger(t), clock.System)
+
+	var in bin.Buffer
+	in.PutID(legacyLangpackGetLangPackTypeID)
+	in.PutString("en")
+	enc, err := r.Dispatch(androidClientContext(), [8]byte{}, 0, &in)
+	if err != nil {
+		t.Fatalf("dispatch legacy langpack.getLangPack: %v", err)
+	}
+	var out bin.Buffer
+	if err := enc.Encode(&out); err != nil {
+		t.Fatalf("encode response: %v", err)
+	}
+	var diff tg.LangPackDifference
+	if err := diff.Decode(&out); err != nil {
+		t.Fatalf("decode response: %v", err)
+	}
+	if diff.LangCode != "en" {
+		t.Fatalf("difference = %+v, want lang_code=en", diff)
+	}
+}
+
+func TestLegacyLangpackGetStrings(t *testing.T) {
+	r := New(Config{DC: 2, IP: "127.0.0.1", Port: 2398}, Deps{}, zaptest.NewLogger(t), clock.System)
+
+	var in bin.Buffer
+	in.PutID(legacyLangpackGetStringsTypeID)
+	in.PutString("en")
+	in.PutVectorHeader(1)
+	in.PutString("lng_intro_about")
+	enc, err := r.Dispatch(androidClientContext(), [8]byte{}, 0, &in)
+	if err != nil {
+		t.Fatalf("dispatch legacy langpack.getStrings: %v", err)
+	}
+	var out bin.Buffer
+	if err := enc.Encode(&out); err != nil {
+		t.Fatalf("encode response: %v", err)
+	}
+	var strings tg.LangPackStringClassVector
+	if err := strings.Decode(&out); err != nil {
+		t.Fatalf("decode response: %v", err)
+	}
+}
+
 func assertLangpackLanguages(t *testing.T, r *Router, ctx context.Context, in *bin.Buffer) {
 	t.Helper()
 	enc, err := r.Dispatch(ctx, [8]byte{}, 0, in)
@@ -52,3 +97,11 @@ func assertLangpackLanguages(t *testing.T, r *Router, ctx context.Context, in *b
 		t.Fatalf("languages = %+v, want English entry", langs.Elems)
 	}
 }
+
+func androidClientContext() context.Context {
+	return WithClientInfo(context.Background(), ClientInfo{
+		DeviceModel: "Android",
+		AppVersion:  "12.7.3",
+		LangCode:    "en",
+	})
+}

internal/rpc/router_test.go

@@ -401,6 +401,7 @@ func TestTDesktopStartupRPCsEncode(t *testing.T) {
 		{name: "help.getPromoData", req: &tg.HelpGetPromoDataRequest{}},
 		{name: "help.getTermsOfServiceUpdate", req: &tg.HelpGetTermsOfServiceUpdateRequest{}},
 		{name: "help.getPremiumPromo", req: &tg.HelpGetPremiumPromoRequest{}},
+		{name: "auth.initPasskeyLogin", req: &tg.AuthInitPasskeyLoginRequest{APIID: 4, APIHash: "test"}},
 		{name: "account.getPassword", req: &tg.AccountGetPasswordRequest{}},
 		{name: "account.getNotifySettings", req: &tg.AccountGetNotifySettingsRequest{Peer: &tg.InputNotifyUsers{}}},
 		{name: "account.resetNotifySettings", req: &tg.AccountResetNotifySettingsRequest{}},