fix: clean up models-config provider normalization

src/agents/models-config.providers.ts

@@ -34,7 +34,7 @@ const MOONSHOT_DEFAULT_COST = {
 function normalizeApiKeyConfig(value: string): string {
   const trimmed = value.trim();
   const match = /^\$\{([A-Z0-9_]+)\}$/.exec(trimmed);
-  return match ? match[1]! : trimmed;
+  return match ? match[1] : trimmed;
 }
 
 function resolveEnvApiKeyVarName(provider: string): string | undefined {
@@ -194,4 +194,3 @@ export function resolveImplicitProviders(params: {
 
   return providers;
 }
-

src/agents/models-config.test.ts

@@ -243,7 +243,11 @@ describe("models config", () => {
         const parsed = JSON.parse(raw) as {
           providers: Record<
             string,
-            { baseUrl?: string; apiKey?: string; models?: Array<{ id: string }> }
+            {
+              baseUrl?: string;
+              apiKey?: string;
+              models?: Array<{ id: string }>;
+            }
           >;
         };
         expect(parsed.providers.minimax?.baseUrl).toBe(