fix: support xhigh reasoning effort in usage records for Claude Messages API

Closes #1732

backend/internal/service/gateway_request.go

@@ -962,7 +962,7 @@ func NormalizeClaudeOutputEffort(raw string) *string {
 		return nil
 	}
 	switch value {
-	case "low", "medium", "high", "max":
+	case "low", "medium", "high", "xhigh", "max":
 		return &value
 	default:
 		return nil

backend/internal/service/gateway_request_test.go

@@ -1149,6 +1149,11 @@ func TestParseGatewayRequest_OutputEffort(t *testing.T) {
 			body:       `{"model":"claude-opus-4-6","output_config":{"effort":"max"},"messages":[]}`,
 			wantEffort: "max",
 		},
+		{
+			name:       "output_config.effort xhigh",
+			body:       `{"model":"claude-opus-4-7","output_config":{"effort":"xhigh"},"messages":[]}`,
+			wantEffort: "xhigh",
+		},
 		{
 			name:       "output_config without effort",
 			body:       `{"model":"claude-opus-4-6","output_config":{},"messages":[]}`,
@@ -1186,9 +1191,10 @@ func TestNormalizeClaudeOutputEffort(t *testing.T) {
 		{"LOW", strPtr("low")},
 		{"Max", strPtr("max")},
 		{" medium ", strPtr("medium")},
+		{"xhigh", strPtr("xhigh")},
+		{"XHIGH", strPtr("xhigh")},
 		{"", nil},
 		{"unknown", nil},
-		{"xhigh", nil},
 	}
 	for _, tt := range tests {
 		t.Run(tt.input, func(t *testing.T) {

frontend/src/utils/format.ts

@@ -193,7 +193,9 @@ export function formatReasoningEffort(effort: string | null | undefined): string
       return 'High'
     case 'xhigh':
     case 'extrahigh':
-      return 'Xhigh'
+      return 'XHigh'
+    case 'max':
+      return 'Max'
     case 'none':
     case 'minimal':
       return '-'