feat: content expansion, prestige shop, and offline earnings improvements

- Expand content to 18 zones, 72 bosses, 95 quests, 32 adventurer tiers
- Add prestige shop with 24 runestone upgrades across 5 categories
- Add PrestigeUpgrade type, data files, API routes, and frontend panel
- Fix offline earnings to include equipment and runestone multipliers
- Add offline essence calculation alongside offline gold
- Update OfflineModal to display both gold and essence earned
- Add IDEAS.md for tracking planned features

apps/api/src/data/upgrades.ts

@@ -580,4 +580,147 @@ export const DEFAULT_UPGRADES: Upgrade[] = [
     purchased: false,
     unlocked: false,
   },
+  {
+    id: "aether_weaver_1",
+    name: "Aetheric Mastery",
+    description: "Complete mastery of aetheric forces doubles the weaver's output.",
+    target: "adventurer",
+    adventurerId: "aether_weaver",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 200_000_000,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "titan_warrior_1",
+    name: "Titanic Fury",
+    description: "The fury of a titan unleashed — warrior effectiveness doubled.",
+    target: "adventurer",
+    adventurerId: "titan_warrior",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 700_000_000,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "nexus_sage_1",
+    name: "Nexus Convergence",
+    description: "The sage converges all ley lines through their body — output doubled.",
+    target: "adventurer",
+    adventurerId: "nexus_sage",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 2_500_000_000,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "cosmos_knight_1",
+    name: "Cosmic Tempering",
+    description: "Tempered by the heat of dying stars, the knight's effectiveness is doubled.",
+    target: "adventurer",
+    adventurerId: "cosmos_knight",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 9_000_000_000,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "astral_sovereign_1",
+    name: "Sovereign Ascension",
+    description: "Ascension to true sovereignty over the astral plane doubles output.",
+    target: "adventurer",
+    adventurerId: "astral_sovereign",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 3e10,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "primordial_mage_1",
+    name: "Primordial Awakening",
+    description: "Awakening of the mage's primordial heritage doubles their power.",
+    target: "adventurer",
+    adventurerId: "primordial_mage",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 1e11,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "reality_warden_1",
+    name: "Reality Binding",
+    description: "The warden binds themselves to the structure of reality — effectiveness doubled.",
+    target: "adventurer",
+    adventurerId: "reality_warden",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 4e11,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "infinity_ranger_1",
+    name: "Infinite Aim",
+    description: "The ranger's arrows travel through infinity itself — output doubled.",
+    target: "adventurer",
+    adventurerId: "infinity_ranger",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 1.5e12,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "oblivion_paladin_1",
+    name: "Oblivion Consecration",
+    description: "Consecrated by the void between all things — paladin effectiveness doubled.",
+    target: "adventurer",
+    adventurerId: "oblivion_paladin",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 5e12,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "transcendent_rogue_1",
+    name: "Transcendent Shadow",
+    description: "The rogue becomes one with the space between states — effectiveness doubled.",
+    target: "adventurer",
+    adventurerId: "transcendent_rogue",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 2e13,
+    purchased: false,
+    unlocked: false,
+  },
+  {
+    id: "omniversal_champion_1",
+    name: "Omniversal Dominion",
+    description: "Dominion over all versions of all universes — champion output doubled.",
+    target: "adventurer",
+    adventurerId: "omniversal_champion",
+    multiplier: 2,
+    costGold: 0,
+    costEssence: 0,
+    costCrystals: 8e13,
+    purchased: false,
+    unlocked: false,
+  },
 ];