chore: keep local locks out of extension repo

Author: Lukas Geiger

.gitignore

@@ -4,6 +4,7 @@ TEST.txt
 TESTS.txt
 TESTERGEBNISSE.txt
 RELEASE_PLAN.md
+LOCK*.txt
 .env
 .env.*
 *.pem

CHANGELOG.md

@@ -34,6 +34,8 @@
 - Normalized the German locale file to real UTF-8 Umlaute instead of escaped code points.
 
 ### Changed
+- Added `LOCK*.txt` to `.gitignore` so local multi-agent coordination locks stay
+  out of public extension releases.
 - Refreshed README and `llms.txt` discovery metadata for Chrome Web Store,
   Edge/Chromium, bookmark-sync, no-account RSS, and local-first feed-reader
   searches.

llms.txt

@@ -66,4 +66,4 @@ RSS-BOOK is not an RSS feed generator for books, an icon pack, a GitBook plugin,
 or a cloud RSS reader. It is the file-bricks browser extension that stores RSS
 and Atom entries as browser bookmarks.
 
-## Last-checked: 2026-06-18
+## Last-checked: 2026-06-19