Fix photo stripes and keep GIF playback off the UI thread.

Use cover/stretch display, solid sample assets, core0 GIF decode without blocking touch, and always-commit project rule.

Co-authored-by: Cursor <cursoragent@cursor.com>

.cursor/rules/commit-after-work.mdc

@@ -0,0 +1,12 @@
+---
+description: Always create a local git commit after finishing a task
+alwaysApply: true
+---
+
+# Git commit after work
+
+After completing a user-requested change (code, docs, firmware, assets), always:
+
+1. Update `CHANGELOG.md` when behavior changes
+2. `git add` relevant files and create a local commit (do not push unless asked)
+3. Keep the working tree clean before ending the turn