fix: restore coding history and quota feedback

shared/ai-gateway-error-kind.ts

@@ -3,8 +3,10 @@ export type AIGatewayErrorKind = 'quota_exhausted' | 'authentication_invalid';
 export function isTokenBalanceExhausted(message: string | null | undefined): boolean {
   const normalized = message?.trim().toLowerCase() ?? '';
   return normalized.includes('token_balance_exhausted')
+    || normalized.includes('token_point_balance_exhausted')
     || normalized.includes('token balance exhausted')
-    || normalized.includes('balance exhausted');
+    || normalized.includes('balance exhausted')
+    || normalized.includes('词元点数余额不足');
 }
 
 export function getAIGatewayErrorKind(message: string | null | undefined): AIGatewayErrorKind | null {

shared/coding-conversation-contracts.ts

@@ -28,6 +28,7 @@ export type CodingRuntimeErrorCode =
   | 'CODING_RUNTIME_READY_TIMEOUT'
   | 'CODING_RUNTIME_PROTOCOL_ERROR'
   | 'CODING_PROVIDER_AUTH_REQUIRED'
+  | 'CODING_PROVIDER_QUOTA_EXHAUSTED'
   | 'CODING_MODEL_UNAVAILABLE'
   | 'CODING_SESSION_UNREADABLE'
   | 'CODING_STORAGE_WRITE_FAILED'

shared/coding-conversation-reducer.ts

@@ -60,6 +60,7 @@ const ERROR_CODES = new Set([
   'CODING_RUNTIME_READY_TIMEOUT',
   'CODING_RUNTIME_PROTOCOL_ERROR',
   'CODING_PROVIDER_AUTH_REQUIRED',
+  'CODING_PROVIDER_QUOTA_EXHAUSTED',
   'CODING_MODEL_UNAVAILABLE',
   'CODING_SESSION_UNREADABLE',
   'CODING_STORAGE_WRITE_FAILED',