feat: add 13 missing late-game equipment items for zones 15-18

Closes #198

apps/api/src/data/achievements.ts

@@ -223,8 +223,8 @@ export const defaultAchievements: Array<Achievement> = [
     unlockedAt:  null,
   },
   {
-    condition:   { amount: 65, type: "equipmentOwned" },
-    description: "Own all 65 pieces of equipment.",
+    condition:   { amount: 78, type: "equipmentOwned" },
+    description: "Own all 78 pieces of equipment.",
     icon:        "🛡️",
     id:          "fully_equipped",
     name:        "Fully Equipped",
@@ -334,8 +334,8 @@ export const defaultAchievements: Array<Achievement> = [
     unlockedAt:  null,
   },
   {
-    condition:   { amount: 122, type: "questsCompleted" },
-    description: "Complete all 122 quests across the known multiverse.",
+    condition:   { amount: 112, type: "questsCompleted" },
+    description: "Complete all 112 quests across the known multiverse.",
     icon:        "🌌",
     id:          "quest_eternal",
     name:        "Quest Eternal",

apps/api/src/data/equipment.ts

@@ -695,6 +695,168 @@ export const defaultEquipment: Array<Equipment> = [
     setId:    "eternal_throne",
     type:     "trinket",
   },
+  // ── Primordial Chaos ──────────────────────────────────────────────────────
+  {
+    bonus: { goldMultiplier: 9 },
+    description:
+      "The Primordial Titan's carapace — formed before the concept of armour existed. It simply is what armour aspires to be.",
+    equipped: false,
+    id:       "chaos_mantle",
+    name:     "The Chaos Mantle",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "primordial_chaos",
+    type:     "armour",
+  },
+  {
+    bonus: { clickMultiplier: 5, combatMultiplier: 2, goldMultiplier: 2.5 },
+    description:
+      "The crystallised core of the Titan itself — the first stable thing to emerge from chaos. It radiates in every direction simultaneously.",
+    equipped: false,
+    id:       "titan_core",
+    name:     "The Titan Core",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "primordial_chaos",
+    type:     "trinket",
+  },
+  // ── Infinite Expanse ──────────────────────────────────────────────────────
+  {
+    bonus: { combatMultiplier: 14 },
+    description:
+      "Forged from the Expanse Sovereign's own reach — a blade that has no beginning and no end, only edge.",
+    equipped: false,
+    id:       "expanse_blade",
+    name:     "The Expanse Blade",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "infinite_expanse",
+    type:     "weapon",
+  },
+  {
+    bonus: { goldMultiplier: 10 },
+    description:
+      "A second iteration of the void's armour — the first was not enough. This one has never been tested to its limit.",
+    equipped: false,
+    id:       "void_armour_mk2",
+    name:     "Void Armour Mk. II",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "infinite_expanse",
+    type:     "armour",
+  },
+  // ── Reality Forge ─────────────────────────────────────────────────────────
+  {
+    bonus: { combatMultiplier: 16 },
+    description:
+      "The Reality Architect's primary instrument — a sword that does not cut through things but rewrites what they are.",
+    equipped: false,
+    id:       "cosmos_blade",
+    name:     "The Cosmos Blade",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "reality_forge",
+    type:     "weapon",
+  },
+  {
+    bonus: { goldMultiplier: 12 },
+    description:
+      "Plated from the substance of reality itself — wearing it makes you feel slightly more real than everything around you.",
+    equipped: false,
+    id:       "reality_plate",
+    name:     "The Reality Plate",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "reality_forge",
+    type:     "armour",
+  },
+  // ── Cosmic Maelstrom ──────────────────────────────────────────────────────
+  {
+    bonus: { combatMultiplier: 18 },
+    description:
+      "Torn from the eye of the Cosmic Annihilator — a weapon that carries the force of an ending universe in every swing.",
+    equipped: false,
+    id:       "maelstrom_edge",
+    name:     "The Maelstrom Edge",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "cosmic_maelstrom",
+    type:     "weapon",
+  },
+  {
+    bonus: { goldMultiplier: 14 },
+    description:
+      "Armour that has weathered the destruction of countless realities. It has learned not to flinch.",
+    equipped: false,
+    id:       "cosmic_plate",
+    name:     "The Cosmic Plate",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "cosmic_maelstrom",
+    type:     "armour",
+  },
+  // ── Primeval Sanctum ──────────────────────────────────────────────────────
+  {
+    bonus: { combatMultiplier: 22 },
+    description:
+      "The first weapon — older than the concept of war, older than the concept of a weapon. It remembers what it was made for.",
+    equipped: false,
+    id:       "primeval_blade",
+    name:     "The Primeval Blade",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "primeval_sanctum",
+    type:     "weapon",
+  },
+  {
+    bonus: { goldMultiplier: 17 },
+    description:
+      "The shield-form of the Primeval God — absolute protection from before the concept of harm existed.",
+    equipped: false,
+    id:       "ancient_aegis",
+    name:     "The Ancient Aegis",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "primeval_sanctum",
+    type:     "armour",
+  },
+  // ── The Absolute ──────────────────────────────────────────────────────────
+  {
+    bonus: { combatMultiplier: 28 },
+    description:
+      "There is no name for what this was before it became a sword. There is no name for what it is now. It ends things.",
+    equipped: false,
+    id:       "absolute_blade",
+    name:     "The Absolute Blade",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "the_absolute",
+    type:     "weapon",
+  },
+  {
+    bonus: { goldMultiplier: 20 },
+    description:
+      "Eternity given the shape of armour — it has always existed, it will always exist, and it has always protected its wearer.",
+    equipped: false,
+    id:       "eternity_plate",
+    name:     "The Eternity Plate",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "the_absolute",
+    type:     "armour",
+  },
+  {
+    bonus: { clickMultiplier: 6, combatMultiplier: 3, goldMultiplier: 3 },
+    description:
+      "The heart of everything — a thing so fundamental that its removal from the Absolute One ended all things, briefly. Briefly.",
+    equipped: false,
+    id:       "omniversal_core",
+    name:     "The Omniversal Core",
+    owned:    false,
+    rarity:   "legendary",
+    setId:    "the_absolute",
+    type:     "trinket",
+  },
   // ── Purchasable endgame sinks ─────────────────────────────────────────────
   {
     bonus: { clickMultiplier: 4.25 },
@@ -757,7 +919,7 @@ export const defaultEquipment: Array<Equipment> = [
     type:     "armour",
   },
   {
-    bonus: { clickMultiplier: 5, combatMultiplier: 1.75, goldMultiplier: 2 },
+    bonus: { clickMultiplier: 5, combatMultiplier: 3, goldMultiplier: 2.5 },
     cost:  { crystals: 100_000_000, essence: 0, gold: 0 },
     description:
       "An artifact from beyond all known planes — it refracts power through all dimensions simultaneously.",