fix: add 60% coverage minimum to CI, scope prettier to staged frontend files

.githooks/pre-commit

@@ -13,13 +13,12 @@ NC='\033[0m' # No Colour
 
 FAILED=0
 
-# ---------- Frontend (prettier --write, then eslint) ----------
-FRONTEND_STAGED=$(git diff --cached --name-only -- 'frontend/' | head -1)
-if [ -n "$FRONTEND_STAGED" ]; then
+# ---------- Frontend (prettier --write staged, then eslint) ----------
+STAGED_FRONTEND=$(git diff --cached --name-only --diff-filter=ACMR | grep '^frontend/' || true)
+if [ -n "$STAGED_FRONTEND" ]; then
 	printf "${YELLOW}Auto-formatting staged frontend files with prettier...${NC}\n"
-	cd frontend && npx prettier --write . 2>&1
+	echo "$STAGED_FRONTEND" | xargs npx prettier --write 2>/dev/null || true
 	# Re-stage any files prettier modified so formatting is included in the commit
-	cd ..
 	git diff --name-only -- 'frontend/' | xargs -r git add
 fi