diff --git a/src/components/usage/CredentialStatsCard.tsx b/src/components/usage/CredentialStatsCard.tsx
index 0579b30c..cd9b795c 100644
--- a/src/components/usage/CredentialStatsCard.tsx
+++ b/src/components/usage/CredentialStatsCard.tsx
@@ -11,6 +11,7 @@ import {
 import { authFilesApi } from '@/services/api/authFiles';
 import type { GeminiKeyConfig, ProviderKeyConfig, OpenAIProviderConfig } from '@/types';
 import type { AuthFileItem } from '@/types/authFile';
+import type { CredentialInfo } from '@/types/sourceInfo';
 import type { UsagePayload } from './hooks/useUsageData';
 import styles from '@/pages/UsagePage.module.scss';
 
@@ -24,11 +25,6 @@ export interface CredentialStatsCardProps {
   openaiProviders: OpenAIProviderConfig[];
 }
 
-interface CredentialInfo {
-  name: string;
-  type: string;
-}
-
 interface CredentialRow {
   key: string;
   displayName: string;
diff --git a/src/components/usage/RequestEventsDetailsCard.tsx b/src/components/usage/RequestEventsDetailsCard.tsx
index 14dd5298..511f0987 100644
--- a/src/components/usage/RequestEventsDetailsCard.tsx
+++ b/src/components/usage/RequestEventsDetailsCard.tsx
@@ -7,6 +7,7 @@ import { Select } from '@/components/ui/Select';
 import { authFilesApi } from '@/services/api/authFiles';
 import type { GeminiKeyConfig, ProviderKeyConfig, OpenAIProviderConfig } from '@/types';
 import type { AuthFileItem } from '@/types/authFile';
+import type { CredentialInfo, SourceInfo } from '@/types/sourceInfo';
 import {
   buildCandidateUsageSourceIds,
   collectUsageDetails,
@@ -60,16 +61,6 @@ const encodeCsv = (value: string | number): string => {
   return `"${safeText.replace(/"/g, '""')}"`;
 };
 
-type CredentialInfo = {
-  name: string;
-  type: string;
-};
-
-type SourceInfo = {
-  displayName: string;
-  type: string;
-};
-
 export function RequestEventsDetailsCard({
   usage,
   loading,
diff --git a/src/pages/LogsPage.tsx b/src/pages/LogsPage.tsx
index 81ec0c32..fcabb80f 100644
--- a/src/pages/LogsPage.tsx
+++ b/src/pages/LogsPage.tsx
@@ -23,6 +23,7 @@ import { authFilesApi } from '@/services/api/authFiles';
 import { logsApi } from '@/services/api/logs';
 import { usageApi } from '@/services/api/usage';
 import type { AuthFileItem } from '@/types';
+import type { CredentialInfo, SourceInfo } from '@/types/sourceInfo';
 import { copyToClipboard } from '@/utils/clipboard';
 import { downloadBlob } from '@/utils/download';
 import { MANAGEMENT_API_PREFIX } from '@/utils/constants';
@@ -157,16 +158,6 @@ type TraceCandidate = {
   timeDeltaMs: number | null;
 };
 
-type TraceCredentialInfo = {
-  name: string;
-  type: string;
-};
-
-type TraceSourceInfo = {
-  displayName: string;
-  type: string;
-};
-
 const TRACE_USAGE_CACHE_MS = 60 * 1000;
 const TRACE_MATCH_STRONG_WINDOW_MS = 3 * 1000;
 const TRACE_MATCH_WINDOW_MS = 10 * 1000;
@@ -505,7 +496,7 @@ export function LogsPage() {
   const [requestLogDownloading, setRequestLogDownloading] = useState(false);
   const [traceLogLine, setTraceLogLine] = useState<ParsedLogLine | null>(null);
   const [traceUsageDetails, setTraceUsageDetails] = useState<UsageDetailWithEndpoint[]>([]);
-  const [traceAuthFileMap, setTraceAuthFileMap] = useState<Map<string, TraceCredentialInfo>>(new Map());
+  const [traceAuthFileMap, setTraceAuthFileMap] = useState<Map<string, CredentialInfo>>(new Map());
   const [traceLoading, setTraceLoading] = useState(false);
   const [traceError, setTraceError] = useState('');
 
@@ -529,7 +520,7 @@ export function LogsPage() {
 
   const disableControls = connectionStatus !== 'connected';
   const traceSourceInfoMap = useMemo(() => {
-    const map = new Map<string, TraceSourceInfo>();
+    const map = new Map<string, SourceInfo>();
 
     const registerSource = (sourceId: string, displayName: string, type: string) => {
       if (!sourceId || !displayName || map.has(sourceId)) return;
@@ -786,7 +777,7 @@ export function LogsPage() {
           ? authFilesResponse
           : (authFilesResponse as { files?: AuthFileItem[] })?.files;
         if (Array.isArray(files)) {
-          const map = new Map<string, TraceCredentialInfo>();
+          const map = new Map<string, CredentialInfo>();
           files.forEach((file) => {
             const key = normalizeAuthIndex(file['auth_index'] ?? file.authIndex);
             if (!key) return;
@@ -932,7 +923,7 @@ export function LogsPage() {
     return scored.slice(0, 8);
   }, [traceLogLine, traceUsageDetails]);
   const resolveTraceSourceInfo = useCallback(
-    (sourceRaw: string, authIndex: unknown): TraceSourceInfo => {
+    (sourceRaw: string, authIndex: unknown): SourceInfo => {
       const source = sourceRaw.trim();
       const matchedSource = traceSourceInfoMap.get(source);
       if (matchedSource) {
diff --git a/src/types/index.ts b/src/types/index.ts
index 1919adca..476e8911 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -13,3 +13,4 @@ export * from './oauth';
 export * from './usage';
 export * from './log';
 export * from './quota';
+export * from './sourceInfo';
diff --git a/src/types/sourceInfo.ts b/src/types/sourceInfo.ts
new file mode 100644
index 00000000..205e3180
--- /dev/null
+++ b/src/types/sourceInfo.ts
@@ -0,0 +1,9 @@
+export type SourceInfo = {
+  displayName: string;
+  type: string;
+};
+
+export type CredentialInfo = {
+  name: string;
+  type: string;
+};