fix(*): Ensure fallback data works correctly

src/lib/agent/services/agentService.ts

@@ -23,10 +23,9 @@ if (!safeModel && !isTestEnv) {
   throw new Error('AI_MODEL is not set');
 }
 
-export const client = AIProjectsClient.fromConnectionString(
+export const client = !isTestEnv && safeConnString
-  safeConnString!,
+  ? AIProjectsClient.fromConnectionString(safeConnString, new DefaultAzureCredential())
-  new DefaultAzureCredential()
+  : undefined;
-);
 
 // const codeInterpreterTool = ToolUtility.createCodeInterpreterTool([]);
 
@@ -71,7 +70,8 @@ export const toolResources = allTools.reduce<Record<string, any>>((map, t) => {
   return map;
 }, {});
 
-export const agent = await client.agents.createAgent(AI_MODEL, {
+export const agent = client
+  ? await client.agents.createAgent(AI_MODEL, {
       name: `assessment-feedback-agent`,
       instructions,
       temperature: 0.5,
@@ -80,4 +80,5 @@ export const agent = await client.agents.createAgent(AI_MODEL, {
       requestOptions: {
         headers: { 'x-ms-enable-preview': 'true' }
       }
-});
+    })
+  : undefined;

src/lib/utils/ai.ts

@@ -145,7 +145,12 @@ export async function gradeSubmissionWithAgent(
   task: string,
   roomId: string
 ): Promise<OpenAIResponse> {
-  if (!client || !agent) {
+  if (!client) {
+    // In test/CI mode, return fallback data
+    return fallbackGrade(submission, task);
+  }
+
+  if (!agent) {
     throw new Error('Agent not available');
   }