feat: add endpoint for retrieving user space credits and implement caching mechanism in UserService

web/src/i18n/locales/en-US.ts

@@ -189,6 +189,7 @@ const enUS = {
     spaceModelReadOnly: 'Space models are read-only',
     noSpaceModels: 'No Space models. Click Sync to fetch models from Space.',
     noLocalModels: 'No local models. Click Create to add a model.',
+    providerCount: '{{count}} providers',
     // New keys for provider-based structure
     addModel: 'Add Model',
     addLLMModel: 'Add LLM Model',
@@ -197,17 +198,17 @@ const enUS = {
     existingProvider: 'Existing Provider',
     newProvider: 'New Provider',
     selectProvider: 'Select Provider',
-    requester: 'Requester',
-    selectRequester: 'Select Requester',
+    requester: 'Provider Type',
+    selectRequester: 'Select Provider Type',
     langbotModelsDescription: 'Cloud models powered by LangBot Space',
-    balance: 'Balance',
+    credits: 'Credits',
     loginWithSpace: 'Login with Space',
     loginToUseModels: 'Login with Space to use cloud models',
     noModels: 'No models configured',
     editProvider: 'Edit Provider',
     providerName: 'Provider Name',
     providerNameRequired: 'Provider name is required',
-    requesterRequired: 'Requester is required',
+    requesterRequired: 'Provider type is required',
     providerSaved: 'Provider saved',
     providerCreated: 'Provider created',
     providerSaveError: 'Failed to save provider: ',