feat(tls-fingerprint): 新增 TLS 指纹 Profile 数据库管理及代码质量优化

新增功能：
- 新增 TLS 指纹 Profile CRUD 管理（Ent schema + 迁移 + Admin API + 前端管理界面）
- 支持账号绑定数据库中的自定义 TLS Profile，或随机选择（profile_id=-1）
- HTTPUpstream.DoWithTLS 接口从 bool 改为 *tlsfingerprint.Profile，支持按账号指定 Profile
- AccountUsageService 注入 TLSFingerprintProfileService，统一 usage 场景与网关的 Profile 解析逻辑

代码优化：
- 删除已被 TLSFingerprintProfileService 完全取代的 registry.go 死代码（418 行）
- 提取 3 个 dialer 的重复 TLS 握手逻辑为 performTLSHandshake() 共用函数
- 修复 GetTLSFingerprintProfileID 缺少 json.Number 处理的 bug
- gateway_service.Forward 中 ResolveTLSProfile 从重试循环内重复调用改为预解析局部变量
- 删除冗余的 buildClientHelloSpec() 单行 wrapper 和 int64(e.ID) 无效转换
- tls_fingerprint_profile_cache.go 日志从 log.Printf 改为 slog 结构化日志
- dialer_capture_test.go 添加 //go:build integration 标签，防止 CI 失败
- 去重 TestProfileExpectation 类型至共享 test_types_test.go
- 修复 9 个测试文件缺少 tlsfingerprint import 的编译错误
- 修复 error_policy_integration_test.go 中 handleError 回调签名被错误替换的问题

backend/internal/service/account_test_service.go

@@ -23,6 +23,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/geminicli"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/tlsfingerprint"
 	"github.com/Wei-Shaw/sub2api/internal/util/soraerror"
 	"github.com/Wei-Shaw/sub2api/internal/util/urlvalidator"
 	"github.com/gin-gonic/gin"
@@ -69,6 +70,7 @@ type AccountTestService struct {
 	antigravityGatewayService *AntigravityGatewayService
 	httpUpstream              HTTPUpstream
 	cfg                       *config.Config
+	tlsFPProfileService       *TLSFingerprintProfileService
 	soraTestGuardMu           sync.Mutex
 	soraTestLastRun           map[int64]time.Time
 	soraTestCooldown          time.Duration
@@ -83,6 +85,7 @@ func NewAccountTestService(
 	antigravityGatewayService *AntigravityGatewayService,
 	httpUpstream HTTPUpstream,
 	cfg *config.Config,
+	tlsFPProfileService *TLSFingerprintProfileService,
 ) *AccountTestService {
 	return &AccountTestService{
 		accountRepo:               accountRepo,
@@ -90,6 +93,7 @@ func NewAccountTestService(
 		antigravityGatewayService: antigravityGatewayService,
 		httpUpstream:              httpUpstream,
 		cfg:                       cfg,
+		tlsFPProfileService:       tlsFPProfileService,
 		soraTestLastRun:           make(map[int64]time.Time),
 		soraTestCooldown:          defaultSoraTestCooldown,
 	}
@@ -300,7 +304,7 @@ func (s *AccountTestService) testClaudeAccountConnection(c *gin.Context, account
 		proxyURL = account.Proxy.URL()
 	}
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 	if err != nil {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Request failed: %s", err.Error()))
 	}
@@ -390,7 +394,7 @@ func (s *AccountTestService) testBedrockAccountConnection(c *gin.Context, ctx co
 		proxyURL = account.Proxy.URL()
 	}
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, false)
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, nil)
 	if err != nil {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Request failed: %s", err.Error()))
 	}
@@ -520,7 +524,7 @@ func (s *AccountTestService) testOpenAIAccountConnection(c *gin.Context, account
 		proxyURL = account.Proxy.URL()
 	}
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 	if err != nil {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Request failed: %s", err.Error()))
 	}
@@ -610,7 +614,7 @@ func (s *AccountTestService) testGeminiAccountConnection(c *gin.Context, account
 		proxyURL = account.Proxy.URL()
 	}
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, s.tlsFPProfileService.ResolveTLSProfile(account))
 	if err != nil {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Request failed: %s", err.Error()))
 	}
@@ -881,9 +885,9 @@ func (s *AccountTestService) testSoraAccountConnection(c *gin.Context, account *
 	if account.ProxyID != nil && account.Proxy != nil {
 		proxyURL = account.Proxy.URL()
 	}
-	enableSoraTLSFingerprint := s.shouldEnableSoraTLSFingerprint()
+	soraTLSProfile := s.resolveSoraTLSProfile()
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, enableSoraTLSFingerprint)
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, soraTLSProfile)
 	if err != nil {
 		recorder.addStep("me", "failed", 0, "network_error", err.Error())
 		s.emitSoraProbeSummary(c, recorder)
@@ -948,7 +952,7 @@ func (s *AccountTestService) testSoraAccountConnection(c *gin.Context, account *
 		subReq.Header.Set("Origin", "https://sora.chatgpt.com")
 		subReq.Header.Set("Referer", "https://sora.chatgpt.com/")
 
-		subResp, subErr := s.httpUpstream.DoWithTLS(subReq, proxyURL, account.ID, account.Concurrency, enableSoraTLSFingerprint)
+		subResp, subErr := s.httpUpstream.DoWithTLS(subReq, proxyURL, account.ID, account.Concurrency, soraTLSProfile)
 		if subErr != nil {
 			recorder.addStep("subscription", "failed", 0, "network_error", subErr.Error())
 			s.sendEvent(c, TestEvent{Type: "content", Text: fmt.Sprintf("Subscription check skipped: %s", subErr.Error())})
@@ -977,7 +981,7 @@ func (s *AccountTestService) testSoraAccountConnection(c *gin.Context, account *
 	}
 
 	// 追加 Sora2 能力探测（对齐 sora2api 的测试思路）：邀请码 + 剩余额度。
-	s.testSora2Capabilities(c, ctx, account, authToken, proxyURL, enableSoraTLSFingerprint, recorder)
+	s.testSora2Capabilities(c, ctx, account, authToken, proxyURL, soraTLSProfile, recorder)
 
 	s.emitSoraProbeSummary(c, recorder)
 	s.sendEvent(c, TestEvent{Type: "test_complete", Success: true})
@@ -990,7 +994,7 @@ func (s *AccountTestService) testSora2Capabilities(
 	account *Account,
 	authToken string,
 	proxyURL string,
-	enableTLSFingerprint bool,
+	tlsProfile *tlsfingerprint.Profile,
 	recorder *soraProbeRecorder,
 ) {
 	inviteStatus, inviteHeader, inviteBody, err := s.fetchSoraTestEndpoint(
@@ -999,7 +1003,7 @@ func (s *AccountTestService) testSora2Capabilities(
 		authToken,
 		soraInviteMineURL,
 		proxyURL,
-		enableTLSFingerprint,
+		tlsProfile,
 	)
 	if err != nil {
 		if recorder != nil {
@@ -1016,7 +1020,7 @@ func (s *AccountTestService) testSora2Capabilities(
 			authToken,
 			soraBootstrapURL,
 			proxyURL,
-			enableTLSFingerprint,
+			tlsProfile,
 		)
 		if bootstrapErr == nil && bootstrapStatus == http.StatusOK {
 			if recorder != nil {
@@ -1029,7 +1033,7 @@ func (s *AccountTestService) testSora2Capabilities(
 				authToken,
 				soraInviteMineURL,
 				proxyURL,
-				enableTLSFingerprint,
+				tlsProfile,
 			)
 			if err != nil {
 				if recorder != nil {
@@ -1081,7 +1085,7 @@ func (s *AccountTestService) testSora2Capabilities(
 		authToken,
 		soraRemainingURL,
 		proxyURL,
-		enableTLSFingerprint,
+		tlsProfile,
 	)
 	if remainingErr != nil {
 		if recorder != nil {
@@ -1122,7 +1126,7 @@ func (s *AccountTestService) fetchSoraTestEndpoint(
 	authToken string,
 	url string,
 	proxyURL string,
-	enableTLSFingerprint bool,
+	tlsProfile *tlsfingerprint.Profile,
 ) (int, http.Header, []byte, error) {
 	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
 	if err != nil {
@@ -1135,7 +1139,7 @@ func (s *AccountTestService) fetchSoraTestEndpoint(
 	req.Header.Set("Origin", "https://sora.chatgpt.com")
 	req.Header.Set("Referer", "https://sora.chatgpt.com/")
 
-	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, enableTLSFingerprint)
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, tlsProfile)
 	if err != nil {
 		return 0, nil, nil, err
 	}
@@ -1224,11 +1228,12 @@ func parseSoraRemainingSummary(body []byte) string {
 	return strings.Join(parts, " | ")
 }
 
-func (s *AccountTestService) shouldEnableSoraTLSFingerprint() bool {
-	if s == nil || s.cfg == nil {
-		return true
+func (s *AccountTestService) resolveSoraTLSProfile() *tlsfingerprint.Profile {
+	if s == nil || s.cfg == nil || !s.cfg.Sora.Client.DisableTLSFingerprint {
+		// Sora TLS fingerprint enabled — use built-in default profile
+		return &tlsfingerprint.Profile{Name: "Built-in Default (Sora)"}
 	}
-	return !s.cfg.Sora.Client.DisableTLSFingerprint
+	return nil // disabled
 }
 
 func isCloudflareChallengeResponse(statusCode int, headers http.Header, body []byte) bool {