Add blood decals, gore, mobile HUD, web start gate + touch/perf tests

Remove tools/fstest.html scratch page used to probe browser
fullscreen/orientation APIs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EznnY8rH2dXhtono1kwsXg

run_tests.sh

@@ -22,10 +22,26 @@ echo ""
 echo "=== Level switch tests (no cross-level geometry/collider leaks) ==="
 "$GODOT" --headless --script tests/level_switch_test.gd
 
+echo ""
+echo "=== Touch control tests (joystick self-heals, never strands) ==="
+"$GODOT" --headless --script tests/touch_controls_test.gd
+
+echo ""
+echo "=== Blood decal tests (floor+wall stamps, ring-buffer cap, gore gate) ==="
+"$GODOT" --headless --script tests/blood_decals_test.gd
+
+echo ""
+echo "=== Rigid-skin tests (web mesh conversion keeps all materials) ==="
+"$GODOT" --headless --script tests/rigid_skin_test.gd
+
 echo ""
 echo "=== Performance tests (frame-budget regression guard) ==="
 "$GODOT" --headless --script tests/performance_test.gd
 
+echo ""
+echo "=== Ragdoll perf (on-hit spike breakdown: build / sim-start / burst / mass hit) ==="
+"$GODOT" --headless --script tests/ragdoll_perf_test.gd
+
 if [[ "$SKIP_GAMEPLAY" -eq 0 ]]; then
     echo ""
     echo "=== Gameplay tests (headless — assertions only, screenshots may be blank) ==="