fix: buff purchasable equipment dominated by boss drops

- celestial_focus: click 3x → 4.25x (above free void_heart_gem)
- void_conduit: combat 7x → 10.5x (above free throne_blade)
- crystal_matrix: gold 4.75x → 7.5x (above free eternal_armour)
- Closes #141

apps/api/src/data/equipment.ts

@@ -697,7 +697,7 @@ export const defaultEquipment: Array<Equipment> = [
   },
   // ── Purchasable endgame sinks ─────────────────────────────────────────────
   {
-    bonus: { clickMultiplier: 3 },
+    bonus: { clickMultiplier: 4.25 },
     cost:  { crystals: 0, essence: 20_000_000, gold: 0 },
     description:
       "A lens of compressed celestial light that sharpens every strike with divine precision.",
@@ -721,7 +721,7 @@ export const defaultEquipment: Array<Equipment> = [
     type:     "armour",
   },
   {
-    bonus: { combatMultiplier: 7 },
+    bonus: { combatMultiplier: 10.5 },
     cost:  { crystals: 0, essence: 100_000_000, gold: 0 },
     description:
       "A weapon that channels void energy — the absence of resistance makes every strike devastating.",
@@ -745,7 +745,7 @@ export const defaultEquipment: Array<Equipment> = [
     type:     "trinket",
   },
   {
-    bonus: { goldMultiplier: 4.75 },
+    bonus: { goldMultiplier: 7.5 },
     cost:  { crystals: 20_000_000, essence: 0, gold: 0 },
     description:
       "Armour structured around a crystalline lattice of optimal income calculations. Every gold piece finds you faster.",