Update app_spec.txt and coding_prompt.md for improved clarity and consistency

- Updated references to `app_spec.txt` and `feature_list.json` in app_spec.txt to include the correct path.
- Enhanced coding_prompt.md by incorporating testing utilities for better test management and readability.
- Added new utility functions in tests/utils.ts to streamline test interactions.

This commit aims to improve documentation accuracy and maintainability of testing practices.

app/src/components/views/agent-output-modal.tsx

@@ -106,6 +106,11 @@ export function AgentOutputModal({
     if (!api?.autoMode) return;
 
     const unsubscribe = api.autoMode.onEvent((event) => {
+      // Filter events for this specific feature only
+      if (event.featureId !== featureId) {
+        return;
+      }
+
       let newContent = "";
 
       if (event.type === "auto_mode_progress") {