feat(deploy): repeatable Cloudflare deploy script + make targets

deploy/cloudflare/deploy.sh (build → optional parallel R2 media sync → Pages
deploy); 'make deploy' (frontend-only) / 'make deploy-media'. One-time setup
stays documented in README. Guards against unauth + mis-keyed R2 uploads.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Makefile

@@ -1,4 +1,4 @@
-.PHONY: sim sim-local
+.PHONY: sim sim-local deploy deploy-media
 
 # Prefer the project venv's interpreter (this box has no bare `python` on PATH),
 # fall back to python3, then python.
@@ -9,3 +9,12 @@ sim:
 
 sim-local:
 	$(PYTHON) -m uvicorn simulator.app:app --reload --port 8000
+
+# Repeatable deploy to benstull.art (Cloudflare Pages + R2). One-time setup
+# (wrangler login, bucket/CORS/domain) is in deploy/cloudflare/README.md.
+# `deploy` is frontend-only (fast); `deploy-media` also re-syncs media to R2.
+deploy:
+	./deploy/cloudflare/deploy.sh
+
+deploy-media:
+	./deploy/cloudflare/deploy.sh --media