New Entry page improvements on link detection

VIBE/CHAT_LOG.md

@@ -1424,3 +1424,39 @@ Don't let the frontend and plugin pull from the google foundry but make sure any
 
 ### Assistant outcome
 Removed the web frontend's Google Fonts import and added a Docker build-time font bundling script. Image builds now download pinned Asset, DM Sans, and Space Grotesk files into `frontend/static/fonts`, generate a local `fonts.css`, and serve them through LinkLog at `/static/fonts`. The Firefox extension did not make Google Font requests and continues to use bundled assets with local fallback fonts. A clean image build confirmed all nine local font assets are present.
+
+### User
+On the new-entry page follow the logic for existing pages that already exists in the plugin and display "This link already exists. Comment and tags can be updated, and by submitting publishing will be retriggered." when the link exists. Also assess if the Auto-fill title button is necessary, or if the functionality can be automated while the URL is entered.
+
+### Assistant outcome
+Added a duplicate-check request (`GET /api/links/check`) to `new-entry.js`, triggered on URL/title blur, that shows the requested warning in a new `#duplicate-status` element and clears it as the fields are edited. Replaced the manual "Auto-fill Title" button with automatic scraping on URL blur (only filling the title when it is still empty and the URL actually changed), removing the now-unused button and CSS.
+
+### User
+Also: detect as duplicate when the URL has arguments (not already stripped). And: add a button to re-fetch the title for if the URL has been fetched but the user still edits the field.
+
+### Assistant outcome
+Added client-side stripping of known tracking parameters (`utm_*`, `gclid`, `fbclid`, etc.) mirroring the browser extension, applied consistently to the scrape lookup, duplicate check, and submission. Added a "Re-fetch Title" button next to the title field that force-refreshes the scraped title regardless of the auto-fill guard.
+
+### User
+If the link already exist with URL arguments then also display the warning, but add that the link has been stored additional parameters.
+
+### Assistant outcome
+Extended the duplicate warning to note when the stored link had additional URL parameters stripped (e.g. tracking parameters) compared to the entered URL.
+
+### User
+I want this last change to be more precise: I do not want to be warned when parameters are stripped, but when the URL entered has arguments/parameters and the URL in the database has none or different ones (even after tracking parameters are stripped).
+
+### Assistant outcome
+Added `find_owned_link_by_title` in `link_service.py` and extended `GET /api/links/check` to return `{exists, url_matches, stored_url}`, detecting a title match with a differing URL in addition to an exact match. `new-entry.js` now only warns about a differing stored URL when `url_matches` is false, no longer warning solely because tracking parameters were stripped from an otherwise matching URL.
+
+### User
+In the check duplicate I have a `<br>` tag, but that shows as formatted text on the page, I want a real break to occur at that position.
+
+### Assistant outcome
+Reworked `setStatus` in `new-entry.js` to split messages on `\n` and build real `<br>` elements via DOM APIs instead of relying on `textContent` (which escaped the literal `<br>`) or unsafe `innerHTML`.
+
+### User
+Update VIBE and Changelog.
+
+### Assistant outcome
+Appended the new-entry duplicate-detection and title auto-fill work to `VIBE/PROMPTS.md` and `VIBE/CHAT_LOG.md`, and added a Version v0.1.3 section to `CHANGELOG.MD`.

VIBE/PROMPTS.md

@@ -254,6 +254,15 @@
 235. I believe tag selection was still working for v0.1.0 - it is still broken
 236. Don't let the frontend and plugin pull from the google foundry but make sure any necessary fonts are served from the linklog server. I would prefer the fonts to be updated at docker image building time.
 
+## 2026-08-28
+
+237. On the new-entry page follow the logic for existing pages that already exists in the plugin and display "This link already exists. Comment and tags can be updated, and by submitting publishing will be retriggered." when the link exists. Also assess if the Auto-fill title button is necessary, or if the functionality can be automated while the URL is entered.
+238. Also: detect as duplicate when the URL has arguments (not already stripped). And: add a button to re-fetch the title for if the URL has been fetched but the user still edits the field.
+239. If the link already exist with URL arguments then also display the warning, but add that the link has been stored additional parameters.
+240. I want this last change to be more precise: I do not want to be warned when parameters are stripped, but when the URL entered has arguments/parameters and the URL in the database has none or different ones (even after tracking parameters are stripped).
+241. In the check duplicate I have a `<br>` tag, but that shows as formatted text on the page, I want a real break to occur at that position.
+242. Update VIBE and Changelog.
+
 ## Future entries
 
 Append each new user prompt here with its date and preserve the chronological order.