feat: add demo-load and demo-reset make commands

Makefile

@@ -19,6 +19,19 @@ setup: start install-plugins
 install-plugins:
 	docker exec -w /app/www/public intotheeast_grav php bin/gpm install $(shell cat plugins.txt | tr '\n' ' ') -y
 
+# ── Demo content ──────────────────────────────────────────────────────────────
+
+demo-load:
+	cp -r user/docs/demo/tracker/. user/pages/01.tracker/
+	docker exec intotheeast_grav bash -c "cd /app/www/public && php bin/grav clearcache"
+
+demo-reset:
+	@for dir in user/docs/demo/tracker/*/; do \
+		folder=$$(basename "$$dir"); \
+		rm -rf "user/pages/01.tracker/$$folder"; \
+	done
+	docker exec intotheeast_grav bash -c "cd /app/www/public && php bin/grav clearcache"
+
 # ── Content sync (user repo ↔ Gitea) ──────────────────────────────────────────
 
 content-push: