---
id: TASK-85
title: 'Fix folk-wrapper crash, service worker API exclusion, fal.ai image-gen'
status: Done
assignee: []
created_date: '2026-03-03 07:43'
labels:
  - bugfix
  - canvas
  - service-worker
  - ai
dependencies: []
references:
  - lib/folk-wrapper.ts
  - website/sw.ts
  - server/index.ts
priority: high
---

## Description

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Three fixes:

1. folk-wrapper.ts createRenderRoot() crashed with "Cannot read properties of null (reading 'appendChild')" — innerHTML="" removed the slot from DOM, making parentElement null on the next line. Fixed by saving parent ref before clearing.

2. Service worker (sw.ts) only excluded /api/ at root path, not module API paths like /jeff/rcal/api/events. These got cached and when network failed, catch handler returned undefined instead of a Response. Fixed with includes("/api/") and proper fallback Response.

3. Image generation returned 502 "No image returned" — queue.fal.run is async (returns request_id), not the actual image. Changed to synchronous fal.run endpoint for all three fal.ai endpoints (image-gen, t2v, i2v).
<!-- SECTION:DESCRIPTION:END -->

## Final Summary

<!-- SECTION:FINAL_SUMMARY:BEGIN -->
Fixed folk-wrapper parentElement null crash, service worker module API path exclusion with proper offline fallback, and fal.ai endpoint from queue.fal.run to fal.run for synchronous image/video generation. Committed as fef419f.
<!-- SECTION:FINAL_SUMMARY:END -->
