Detonate rifle grenades on impact with original Half-Life fireball

docs/WEB-DEPLOY.md

@@ -1,5 +1,27 @@
 # Web build and compressed deployment
 
+## Contact grenade / original Half-Life fireball: add7baaef2b022ef
+
+First-impact detonation (floor, props, walls, enemies and glass), no old timed fuse;
+original `zerogxplode.spr` converted to a portable additive PNG atlas (15 frames,
+15 FPS), see `docs/GRENADES-WAVES.md`. Damage, blast radius and cooldown unchanged.
+
+- PCK 4,420,396 bytes; total gzip payload 12,866,911 bytes.
+- SHA256 verified on all 14 uploaded files; HTTPS-decoded PCK byte-identical to local.
+- Atomic root swap; backup `/home/debian/zombie-fps-backups/index-before-impact-add7baaef2b022ef.html`.
+- No nginx/API changes, no release deletion; previous `a961c96175bc644e` and older
+  `209fa6b154fea8df` retained (three release directories after this deploy).
+- 24 grenade checks passed headless and with the real Compatibility renderer;
+  all 15 Godot suites plus the 42-check API suite passed in their appropriate drivers.
+  `test_start_screen` needs a real display (headless dummy misses its GUI click).
+- Captured five original fireball frames after a real floor impact in the office.
+  Exported Web build booted in Firefox/WebGL2 and touch grenade launch worked on
+  loopback (no production score submissions). Loopback has no score API, so its
+  HTTP 404/501 and JSON parse errors on death are expected test-environment limitations.
+- Live root, PCK, WASM and API health verified; versioned WASM retains correct MIME
+  and immutable/Vary headers. Browser production check stays at the menu to avoid
+  recording test games in the global leaderboard.
+
 ## Global high scores release: a961c96175bc644e
 
 Start screen with global leaderboard, player name and score submission; new score API