Drop a committed Emacs lock file, and ignore them

.#README was a dangling symlink to nexoniarz@archlinux.397465:1776946774
-- an editor lock from an interrupted session, swept into the initial
import by `git add -A`. It points at a PID on another machine and means
nothing anywhere else.

.gitignore

@@ -27,3 +27,9 @@ dist/
 # .claude/memory/ IS tracked -- it is the project memory, and committing it is
 # how it survives a directory rename and reaches the other machines.
 .claude/settings.local.json
+
+# Emacs lock files: dangling symlinks like .#README -> user@host.pid, left
+# behind when a session ends badly. One was committed in the initial import.
+.#*
+*~
+\#*\#