diff --git a/docs/map.md b/docs/map.md
index 461dec9..093f3e4 100644
--- a/docs/map.md
+++ b/docs/map.md
@@ -15,12 +15,11 @@ A fast, single-user, locally hosted web app (`app.py` + vanilla HTML/CSS/JS in `
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 - [Decouple core photo cleaning logic for CLI and API reuse](https://code.tilltheend.de/tilltheend/unwrap-clothes/issues/2): Extracted encoding, OpenRouter API client, and in-memory Lanczos resolution restoration into `cleaner.py`, supporting both raw bytes and paths for CLI and web API reuse.
 - [Implement FastAPI backend and /api/clean endpoint in app.py](https://code.tilltheend.de/tilltheend/unwrap-clothes/issues/3): Built FastAPI service in `app.py` exposing `POST /api/clean` with multipart upload, base64 data URI response, Lanczos toggle, and static file hosting.
+- [Build single-page web UI in static/index.html](https://code.tilltheend.de/tilltheend/unwrap-clothes/issues/4): Created vanilla single-page UI in `static/index.html` with drag-and-drop upload, preset selectors, elapsed timer, side-by-side comparison, and clean image download.
 
 ## Not yet specified
 
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-
-- Error handling and recovery UI (rate limit 429, invalid API key 401, timeout, or moderation errors displayed gracefully in the web UI)
 - Batch upload or multi-image queue (if single-image workflow demands scaling)
 
 ## Out of scope