chore(skills): remove temp file pattern from pr-push skill

Pass PR description inline instead of writing to /tmp/pr-body.md
and cat-ing it back — matches the tea-comment wrapper approach.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/pr-push/SKILL.md

@@ -100,15 +100,11 @@ git diff --stat main...<branch>
 Draft title (`<type>(<scope>): <summary>`, max 70 chars) and description.
 
 ```bash
-cat > /tmp/pr-body.md << 'EOF'
-## Summary
-...
-EOF
 tea pr create \
   --repo jpmschweitzer/settled-reach \
   --login schweitz \
   --title "<title>" \
-  --description "$(cat /tmp/pr-body.md)" \
+  --description "## Summary ..." \
   --base main \
   --head <branch>
 ```