refactor(models): clarify online pricing source label

frontend/src/i18n/messages.ts

@@ -323,7 +323,7 @@ export const messages = {
     'models.externalCatalog.saved': '外部模型目录代理节点已保存',
     'models.externalCatalog.saveFailed': '保存外部模型目录代理节点失败',
     'models.externalCatalog.loadFailed': '加载外部模型目录代理节点失败',
-    'models.pricingSource.label': '价格来源',
+    'models.pricingSource.label': '在线定价来源',
     'models.pricingSource.choose': '选择来源',
     'models.pricingSource.currentTitle': '当前来源：{provider}；选择其他来源会立即同步价格',
     'models.pricingSource.chooseTitle': '选择来源并立即同步在线价格',
@@ -740,7 +740,7 @@ export const messages = {
     'models.externalCatalog.saved': 'External model catalog proxy saved',
     'models.externalCatalog.saveFailed': 'Failed to save external model catalog proxy',
     'models.externalCatalog.loadFailed': 'Failed to load external model catalog proxy',
-    'models.pricingSource.label': 'Price source',
+    'models.pricingSource.label': 'Online pricing source',
     'models.pricingSource.choose': 'Choose source',
     'models.pricingSource.currentTitle': 'Current source: {provider}. Choosing another source syncs its prices immediately.',
     'models.pricingSource.chooseTitle': 'Choose a source and sync its online prices immediately',

frontend/src/views/admin/__tests__/ModelManagement.pricing-source.spec.ts

@@ -254,7 +254,7 @@ describe('ModelManagement pricing-source workflow', () => {
     setI18nLocale('en-US')
     await settle()
 
-    expect(document.body.textContent).toContain('Price source')
+    expect(document.body.textContent).toContain('Online pricing source')
     expect(document.body.textContent).toContain('Batch manage')
     expect(document.body.querySelector(
       '[aria-label="Select model Test Model"]',