feat(claude): 自动同步 Claude Code 客户端版本号

出站伪装用的 Claude Code 版本号此前硬编码在 claude.CLICurrentVersion，
只能靠环境变量 SUB2API_CLAUDE_CLI_VERSION 覆盖且需重启；Anthropic 抬高
版本下限时（如 Opus 5.5 要求 >= 2.1.280）必须改代码发版才能跟上。

改为每小时从官方 GitHub Releases 同步最新稳定版，无需重启也无需发版。

- 新增 ClaudeCodeVersionSyncService：1 小时间隔，数据源 anthropics/claude-code
  的 releases/latest，失败回退最近 30 条列表；过滤 draft/prerelease；
  只向前推进，拉取失败保留上次值不降级；面板可关闭
- 新增三个设置项：claude_code_client_version（管理员手动固定）、
  claude_code_client_version_synced（同步服务独占写）、
  claude_code_version_auto_sync_enabled（开关，默认开）
- 取值优先级：面板手动值 -> 同步值 -> SUB2API_CLAUDE_CLI_VERSION -> 内置基线，
  每层经 IsSupportedCLIVersion 校验，含 60s 缓存与 singleflight
- 版本号运行期化：claude.DefaultHeaders 由包级 var 改为函数，新增
  EffectiveCLIVersion/DefaultUserAgent 与 SetCLIVersionResolver（未注入时
  与 CLIVersion() 等价）；identity 的 defaultFingerprint 不再在包 init 固化，
  指纹下限与主版本超前校验改用运行期值
- 守住一致性铁律：buildUpstreamRequest 与 count_tokens 各取一次 UA 字符串，
  同时喂给出站 User-Agent 头与请求体 billing 的 cc_version，避免缓存翻转
  瞬间头体版本不一致被判非正版客户端
- 管理后台设置页新增配置区块，含中英文案与「当前同步到」只读展示

backend/cmd/server/wire.go

@@ -99,6 +99,7 @@ func provideCleanup(
 	accountExpiry *service.AccountExpiryService,
 	cnProviderBalanceCheck *service.CNProviderBalanceCheckService,
 	codexVersionSync *service.OpenAICodexVersionSyncService,
+	claudeCodeVersionSync *service.ClaudeCodeVersionSyncService,
 	proxyExpiry *service.ProxyExpiryService,
 	subscriptionExpiry *service.SubscriptionExpiryService,
 	usageCleanup *service.UsageCleanupService,
@@ -272,6 +273,10 @@ func provideCleanup(
 				codexVersionSync.Stop()
 				return nil
 			}},
+			{"ClaudeCodeVersionSyncService", func() error {
+				claudeCodeVersionSync.Stop()
+				return nil
+			}},
 			{"ProxyExpiryService", func() error {
 				proxyExpiry.Stop()
 				return nil

backend/cmd/server/wire_gen.go

@@ -341,6 +341,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	accountExpiryService := service.ProvideAccountExpiryService(accountRepository)
 	cnProviderBalanceCheckService := service.ProvideCNProviderBalanceCheckService(accountRepository, cnProviderBalanceService, cnProviderQuotaService, configConfig)
 	openAICodexVersionSyncService := service.ProvideOpenAICodexVersionSyncService(settingRepository, settingService, gitHubReleaseClient)
+	claudeCodeVersionSyncService := service.ProvideClaudeCodeVersionSyncService(settingRepository, settingService, gitHubReleaseClient)
 	proxyExpiryService := service.ProvideProxyExpiryService(proxyRepository)
 	subscriptionExpiryService := service.ProvideSubscriptionExpiryService(userSubscriptionRepository, settingRepository, notificationEmailService, leaderLockCache, db)
 	batchImageWorkerRuntime := service.ProvideBatchImageWorkerRuntime(batchImageRepository, accountRepository, batchImageQueue, usageBillingRepository, usageLogRepository, batchImageModelPricingResolver, apiKeyAuthCacheInvalidator, configConfig)
@@ -350,7 +351,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	channelMonitorRunner := service.ProvideChannelMonitorRunner(channelMonitorService, settingService, channelMonitorQuotaFetcher)
 	channelMonitorV2Aggregator := service.ProvideChannelMonitorV2Aggregator(channelMonitorV2Repository, db, settingService)
 	userPlatformQuotaUsageFlusher := service.ProvideUserPlatformQuotaUsageFlusher(configConfig, billingCache, serviceUserPlatformQuotaRepository, timingWheelService)
-	v := provideCleanup(client, redisClient, opsMetricsCollector, opsAggregationService, opsAlertEvaluatorService, opsCleanupService, opsScheduledReportService, opsSystemLogSink, opsService, opsIngressRejectAggregator, apiKeyService, authCacheInvalidationWorker, schedulerSnapshotService, tokenRefreshService, accountExpiryService, cnProviderBalanceCheckService, openAICodexVersionSyncService, proxyExpiryService, subscriptionExpiryService, usageCleanupService, idempotencyCleanupService, batchImageCleanupService, batchImageWorkerRuntime, pricingService, emailQueueService, billingCacheService, usageRecordWorkerPool, subscriptionService, oAuthService, openAIOAuthService, geminiOAuthService, antigravityOAuthService, grokOAuthService, openAIGatewayService, scheduledTestRunnerService, backupService, paymentOrderExpiryService, channelMonitorRunner, channelMonitorV2Aggregator, userPlatformQuotaUsageFlusher, upstreamBillingProbeService, ollamaCloudUsageService, auditLogService, openAIQuotaAutoResetService, promptService, pluginManager)
+	v := provideCleanup(client, redisClient, opsMetricsCollector, opsAggregationService, opsAlertEvaluatorService, opsCleanupService, opsScheduledReportService, opsSystemLogSink, opsService, opsIngressRejectAggregator, apiKeyService, authCacheInvalidationWorker, schedulerSnapshotService, tokenRefreshService, accountExpiryService, cnProviderBalanceCheckService, openAICodexVersionSyncService, claudeCodeVersionSyncService, proxyExpiryService, subscriptionExpiryService, usageCleanupService, idempotencyCleanupService, batchImageCleanupService, batchImageWorkerRuntime, pricingService, emailQueueService, billingCacheService, usageRecordWorkerPool, subscriptionService, oAuthService, openAIOAuthService, geminiOAuthService, antigravityOAuthService, grokOAuthService, openAIGatewayService, scheduledTestRunnerService, backupService, paymentOrderExpiryService, channelMonitorRunner, channelMonitorV2Aggregator, userPlatformQuotaUsageFlusher, upstreamBillingProbeService, ollamaCloudUsageService, auditLogService, openAIQuotaAutoResetService, promptService, pluginManager)
 	application := &Application{
 		Server:        httpServer,
 		PromptAudit:   promptService,
@@ -405,6 +406,7 @@ func provideCleanup(
 	accountExpiry *service.AccountExpiryService,
 	cnProviderBalanceCheck *service.CNProviderBalanceCheckService,
 	codexVersionSync *service.OpenAICodexVersionSyncService,
+	claudeCodeVersionSync *service.ClaudeCodeVersionSyncService,
 	proxyExpiry *service.ProxyExpiryService,
 	subscriptionExpiry *service.SubscriptionExpiryService,
 	usageCleanup *service.UsageCleanupService,
@@ -577,6 +579,10 @@ func provideCleanup(
 				codexVersionSync.Stop()
 				return nil
 			}},
+			{"ClaudeCodeVersionSyncService", func() error {
+				claudeCodeVersionSync.Stop()
+				return nil
+			}},
 			{"ProxyExpiryService", func() error {
 				proxyExpiry.Stop()
 				return nil

backend/cmd/server/wire_gen_test.go

@@ -41,6 +41,7 @@ func TestProvideCleanup_WithMinimalDependencies_NoPanic(t *testing.T) {
 	)
 	accountExpirySvc := service.NewAccountExpiryService(nil, time.Second)
 	codexVersionSyncSvc := service.NewOpenAICodexVersionSyncService(nil, nil, nil, time.Second)
+	claudeCodeVersionSyncSvc := service.NewClaudeCodeVersionSyncService(nil, nil, nil, time.Second)
 	proxyExpirySvc := service.NewProxyExpiryService(nil, time.Second)
 	subscriptionExpirySvc := service.NewSubscriptionExpiryService(nil, time.Second)
 	pricingSvc := service.NewPricingService(cfg, nil)
@@ -68,6 +69,7 @@ func TestProvideCleanup_WithMinimalDependencies_NoPanic(t *testing.T) {
 		accountExpirySvc,
 		nil, // cnProviderBalanceCheck
 		codexVersionSyncSvc,
+		claudeCodeVersionSyncSvc,
 		proxyExpirySvc,
 		subscriptionExpirySvc,
 		&service.UsageCleanupService{},