Merge origin/main into nightly

Resolve conflicts:
- .gitignore: keep nightly additions (.test, skills-lock.json)
- relay/helper/price.go: keep both billingexpr and model imports
- en.json / zh-CN.json: keep nightly's superset of i18n entries
- service/billing_session.go: add missing 3rd arg to DecreaseUserQuota
- en.json / zh-CN.json: deduplicate 129+320 duplicate i18n keys

relay/common/override.go

@@ -32,6 +32,7 @@ var paramOverrideKeyAuditPaths = map[string]struct{}{
 	"upstream_model": {},
 	"service_tier":   {},
 	"inference_geo":  {},
+	"speed":          {},
 }
 
 type paramOverrideAuditRecorder struct {

relay/common/override_test.go

@@ -2038,6 +2038,8 @@ func TestRemoveDisabledFieldsDefaultFiltering(t *testing.T) {
 	input := `{
 		"service_tier":"flex",
 		"inference_geo":"eu",
+		"speed":"fast",
+		"cache_control":{"type":"ephemeral"},
 		"safety_identifier":"user-123",
 		"store":true,
 		"stream_options":{"include_obfuscation":false}
@@ -2048,7 +2050,7 @@ func TestRemoveDisabledFieldsDefaultFiltering(t *testing.T) {
 	if err != nil {
 		t.Fatalf("RemoveDisabledFields returned error: %v", err)
 	}
-	assertJSONEqual(t, `{"store":true}`, string(out))
+	assertJSONEqual(t, `{"cache_control":{"type":"ephemeral"},"store":true}`, string(out))
 }
 
 func TestRemoveDisabledFieldsAllowInferenceGeo(t *testing.T) {
@@ -2067,6 +2069,22 @@ func TestRemoveDisabledFieldsAllowInferenceGeo(t *testing.T) {
 	assertJSONEqual(t, `{"inference_geo":"eu","store":true}`, string(out))
 }
 
+func TestRemoveDisabledFieldsAllowSpeed(t *testing.T) {
+	input := `{
+		"speed":"fast",
+		"store":true
+	}`
+	settings := dto.ChannelOtherSettings{
+		AllowSpeed: true,
+	}
+
+	out, err := RemoveDisabledFields([]byte(input), settings, false)
+	if err != nil {
+		t.Fatalf("RemoveDisabledFields returned error: %v", err)
+	}
+	assertJSONEqual(t, `{"speed":"fast","store":true}`, string(out))
+}
+
 func TestApplyParamOverrideWithRelayInfoRecordsOperationAuditInDebugMode(t *testing.T) {
 	originalDebugEnabled := common2.DebugEnabled
 	common2.DebugEnabled = true

relay/common/relay_info.go

@@ -444,6 +444,7 @@ func genBaseRelayInfo(c *gin.Context, request dto.Request) *RelayInfo {
 	if request != nil {
 		isStream = request.IsStream(c)
 	}
+	c.Set(string(constant.ContextKeyIsStream), isStream)
 
 	// firstResponseTime = time.Now() - 1 second
 
@@ -776,6 +777,7 @@ func FailTaskInfo(reason string) *TaskInfo {
 // RemoveDisabledFields 从请求 JSON 数据中移除渠道设置中禁用的字段
 // service_tier: 服务层级字段，可能导致额外计费（OpenAI、Claude、Responses API 支持）
 // inference_geo: Claude 数据驻留推理区域字段（仅 Claude 支持，默认过滤）
+// speed: Claude 推理速度模式字段（仅 Claude 支持，默认过滤）
 // store: 数据存储授权字段，涉及用户隐私（仅 OpenAI、Responses API 支持，默认允许透传，禁用后可能导致 Codex 无法使用）
 // safety_identifier: 安全标识符，用于向 OpenAI 报告违规用户（仅 OpenAI 支持，涉及用户隐私）
 // stream_options.include_obfuscation: 响应流混淆控制字段（仅 OpenAI Responses API 支持）
@@ -804,6 +806,13 @@ func RemoveDisabledFields(jsonData []byte, channelOtherSettings dto.ChannelOther
 		}
 	}
 
+	// 默认移除 speed，除非明确允许（避免意外切换 Claude 推理速度模式）
+	if !channelOtherSettings.AllowSpeed {
+		if _, exists := data["speed"]; exists {
+			delete(data, "speed")
+		}
+	}
+
 	// 默认允许 store 透传，除非明确禁用（禁用可能影响 Codex 使用）
 	if channelOtherSettings.DisableStore {
 		if _, exists := data["store"]; exists {