Phase 5: active items — room-clear charged, dedicated pedestals, Space to use

- ACTIVES table with 10 actives (Bone Nova, Offal Bomb, Blood Transfusion,
  Cleaver Storm, Butcher's Bell, Marrow Draught, Slaughter Time, Panic Room,
  Skinner's Coin, Gut Reroll); charges accrue +1/combat room, +2/boss
- Dedicated 'active' pickup with weapon-style swap-drop; 30% boss / 15% item-room
  bonus pedestal spawns; flat +2 powerScore while held
- HUD active slot with charge pips + READY state; ACTIVES help page (12 pages);
  teal medallion frame variant in draw_sprites.py; 10 generated icons
- Procedural Sfx.active()/activeEmpty() (real clips deferred to audio batch)
- Fix: toast panel width now fits the wider of title/subtitle and clamps to screen
- Bump asset cache to v=40

js/sfx.js

@@ -376,6 +376,8 @@ const Sfx = {
   ammo() { this.ui('ammo', () => { this.click(.14, 1600, 'ui'); this.blip(520, .08, 'square', .12, -80, 'ui'); }); },
   weapon() { this.ui('weapon', () => { this.thump(120, .14, .4, 50, 'ui'); this.blip(300, .1, 'square', .25, 200, 'ui'); this.blip(450, .12, 'square', .2, 250, 'ui'); }); },
   item() { this.ui('item', () => { this.thump(100, .2, .4, 45, 'ui'); this.blip(350, .15, 'triangle', .3, 150, 'ui'); this.blip(525, .2, 'triangle', .25, 200, 'ui'); }); },
+  active() { this.thump(140, .22, .5, 60, 'ui'); this.blip(700, .12, 'sawtooth', .28, 500, 'ui'); this.noise(.1, .14, 2400, 'ui', null, true); },
+  activeEmpty() { this.blip(220, .12, 'square', .18, -90, 'ui'); },
   levelup() { this.ui('levelup', () => { this.blip(400, .12, 'square', .25, 200, 'ui'); setTimeout(() => this.blip(600, .12, 'square', .25, 200, 'ui'), 100); setTimeout(() => this.blip(800, .2, 'square', .25, 200, 'ui'), 200); }); },
   perk() { this.ui('perk', () => this.blip(500, .1, 'square', .25, 300, 'ui')); },
   menu() { this.ui('menu', () => this.blip(620, .055, 'square', .11, 120, 'ui')); },