fix: persistent mute toggle, 25%/floor shield regen, halved pressure relief, shielded hits no relief, drop Scavenger perk (0.9.2)

docs/README.md

@@ -13,7 +13,7 @@ MeatSlicer is an endless top-down arena roguelite. You are the Butcher, descendi
 | [Gameplay Guide](gameplay.md) | Core loop, controls, player stats, rooms & floors, pickups, leveling, scoring, pressure/difficulty systems, HUD |
 | [Weapons](weapons.md) | All 16 weapons with exact stats, drop tiers, and damage math |
 | [Items](items.md) | All 82 passive items, stacking/tier rules, proc numbers, synergies |
-| [Perks](perks.md) | All 23 Mutation Draft perks, XP curve, draft mechanics |
+| [Perks](perks.md) | All 22 Mutation Draft perks, XP curve, draft mechanics |
 | [Enemies](enemies.md) | All 11 enemy types, elites, drops, wave and scaling formulas |
 | [Bosses](bosses.md) | All 9 bosses: rotation, scaling, full attack patterns, counters |
 | [Debug Console](dev-debug.md) | In-game cheat/inspection toolset (backtick `` ` `` key, `--dev` flag): all 8 tabs, run tainting, stat-rebuild internals |
@@ -23,7 +23,7 @@ MeatSlicer is an endless top-down arena roguelite. You are the Butcher, descendi
 
 - **16 weapons** (1 infinite-ammo sidearm + 15 special weapons across 4 tiers)
 - **82 passive items** (stacking, tier cap IX)
-- **23 perks** (draft 1 of 3 per level-up)
+- **22 perks** (draft 1 of 3 per level-up)
 - **11 enemy types** (+ elite variants)
 - **9 bosses** (fixed rotation, one per floor)
 - **∞ floors** (permadeath, endless descent, high-score chase)