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([]);
 
@@ -71,13 +70,15 @@ 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
-  name: `assessment-feedback-agent`,
+  ? await client.agents.createAgent(AI_MODEL, {
-  instructions,
+      name: `assessment-feedback-agent`,
-  temperature: 0.5,
+      instructions,
-  tools,
+      temperature: 0.5,
-  toolResources,
+      tools,
-  requestOptions: {
+      toolResources,
-    headers: { 'x-ms-enable-preview': 'true' }
+      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');
   }