Isolate Kimi usage home lookup in tests (#1636)

packages/server/src/services/quota-fetcher/providers/kimi.ts

@@ -24,6 +24,7 @@ const KimiAuthSchema = z.object({
 interface KimiQuotaProviderOptions {
   logger: Logger;
   fetch?: ProviderApiFetch;
+  homeDir?: string;
 }
 
 export class KimiQuotaProvider implements ProviderUsageFetcher {
@@ -32,10 +33,12 @@ export class KimiQuotaProvider implements ProviderUsageFetcher {
 
   private readonly logger: Logger;
   private readonly fetchApi: ProviderApiFetch;
+  private readonly homeDir?: string;
 
   constructor(options: KimiQuotaProviderOptions) {
     this.logger = options.logger;
     this.fetchApi = options.fetch ?? fetch;
+    this.homeDir = options.homeDir;
   }
 
   async fetchUsage(): Promise<ProviderUsage> {
@@ -88,13 +91,14 @@ export class KimiQuotaProvider implements ProviderUsageFetcher {
   }
 
   private async readKimiToken(): Promise<string | null> {
+    const homeDir = this.homeDir ?? homedir();
     const paths = [
       join(
-        process.env["KIMI_CODE_HOME"] || join(homedir(), ".kimi-code"),
+        process.env["KIMI_CODE_HOME"] || join(homeDir, ".kimi-code"),
         "credentials",
         "kimi-code.json",
       ),
-      join(homedir(), ".kimi", "credentials", "kimi-code.json"),
+      join(homeDir, ".kimi", "credentials", "kimi-code.json"),
     ];
 
     for (const path of paths) {