Land PR #19 static site infrastructure (rebased onto pr13-revised)

Phase 2: Play tab — selection boundary, move arrows, clear selection

Phase 2: Play tab — fix hp, reorder panel, cleaner units table

Phase 2: Play tab — show objective, units panel, sharper minimap

Phase 2: 'Play' tab in app.py — human-labeling UI

Add HF identity verification and anonymous submission support

Add server-side game aggregation with minimum 5-game threshold

Security hardening: XSS prevention, input validation, rate limiting

Add agent URL hyperlinks, replay downloads, and submit_with_replay endpoint

Add upload form, API endpoint, 5 difficulty tiers, real game data

Fix scoring dedup, add test suite, wire openra-rl-util

Revert "Fix scoring dedup, add test suite, wire openra-rl-util"

Fix scoring dedup, add test suite, wire openra-rl-util