chore: rename local issue workspace

Author: TopiCsarno

.gitignore

@@ -2,6 +2,7 @@
 .codex
 .flatpak-builder/
 .scratch/
+issues/
 build-dir/
 repo/
 dist/
@@ -22,4 +23,3 @@ debian/*
 !debian/install
 !debian/rules
 !debian/source
-

.scratch/fixed-percent-panel-slots/issues/001-use-fixed-percent-slots.md

@@ -14,7 +14,7 @@
 
 ### Issue tracker
 
-Issues are tracked as local markdown files under `.scratch/`. See `docs/agents/issue-tracker.md`.
+Issues are tracked as local markdown files under `issues/`. See `docs/agents/issue-tracker.md`.
 
 ### Triage labels