feat: integrate BlendSwap fish models (neon tetra, oscar, knifefish, clownfish, blueface angelfish)

- Added 4 new species to shop and genetics system
- Replaced maya's angelfish with higher-quality BlendSwap blueface angelfish
- New starter lineup: 12 fish (angelfish x2, goldfish, guppy x2, neon tetra x2, oscar, knifefish, clownfish, quaternius x2)
- Models: CC0 (angelfish, clownfish), CC-BY (neon tetra, oscar, knifefish by aeroplankton)

src/game/economy.ts

@@ -9,6 +9,10 @@ export const FISH_PRICES: Record<FishSpecies, number> = {
   fish1: 50,
   fish2: 70,
   fish3: 65,
+  neon_tetra: 75,
+  oscar: 120,
+  knifefish: 110,
+  clownfish: 90,
 };
 
 /** Cost to upgrade TO tank tier (index = target tier) */
@@ -81,10 +85,14 @@ export const SPECIES_RARITY_DIST: Record<FishSpecies, Record<Rarity, number>> =
   fish1: { common: 75, uncommon: 15, rare: 6, epic: 3, legendary: 1 },
   fish2: { common: 65, uncommon: 20, rare: 10, epic: 4, legendary: 1 },
   fish3: { common: 68, uncommon: 18, rare: 9, epic: 4, legendary: 1 },
+  neon_tetra: { common: 65, uncommon: 20, rare: 8, epic: 5, legendary: 2 },
+  oscar: { common: 55, uncommon: 25, rare: 12, epic: 6, legendary: 2 },
+  knifefish: { common: 50, uncommon: 25, rare: 13, epic: 8, legendary: 4 },
+  clownfish: { common: 60, uncommon: 22, rare: 10, epic: 6, legendary: 2 },
 };
 
 /** Available species in shop */
-export const SHOP_SPECIES: FishSpecies[] = ["angelfish", "goldfish", "guppy", "fish1", "fish2", "fish3"];
+export const SHOP_SPECIES: FishSpecies[] = ["angelfish", "goldfish", "guppy", "neon_tetra", "oscar", "knifefish", "clownfish", "fish1", "fish2", "fish3"];
 
 /** Species display names */
 export const SPECIES_NAMES: Record<FishSpecies, string> = {
@@ -94,4 +102,8 @@ export const SPECIES_NAMES: Record<FishSpecies, string> = {
   fish1: "Cute Fish I",
   fish2: "Cute Fish II",
   fish3: "Cute Fish III",
+  neon_tetra: "Neon Tetra",
+  oscar: "Oscar Cichlid",
+  knifefish: "Ghost Knifefish",
+  clownfish: "Clownfish",
 };

src/game/state.ts

@@ -10,9 +10,15 @@ export function createDefaultState(): GameState {
     makeFish("angelfish", 0.55),
     makeFish("angelfish", 0.50),
     makeFish("goldfish", 0.45),
-    makeFish("goldfish", 0.40),
     makeFish("guppy", 0.40),
     makeFish("guppy", 0.35),
+    makeFish("neon_tetra", 0.30),
+    makeFish("neon_tetra", 0.28),
+    makeFish("oscar", 0.60),
+    makeFish("knifefish", 0.50),
+    makeFish("clownfish", 0.40),
+    makeFish("fish1", 0.45),
+    makeFish("fish2", 0.50),
   ];
   return {
     version: VERSION,

src/game/types.ts

@@ -1,7 +1,7 @@
 export type Rarity = "common" | "uncommon" | "rare" | "epic" | "legendary";
 export type Pattern = "solid" | "striped" | "spotted" | "gradient";
 export type Gender = "male" | "female";
-export type FishSpecies = "angelfish" | "goldfish" | "guppy" | "fish1" | "fish2" | "fish3";
+export type FishSpecies = "angelfish" | "goldfish" | "guppy" | "fish1" | "fish2" | "fish3" | "neon_tetra" | "oscar" | "knifefish" | "clownfish";
 
 export interface Genetics {
   hueShift: number;      // -30 to +30

src/main.ts

@@ -47,12 +47,16 @@ function isQuaternius(sp: FishSpecies): boolean {
 }
 function getSpeciesUrl(sp: FishSpecies): string {
   const urls: Record<FishSpecies, string> = {
-    angelfish: "models/angelfish.glb",
+    angelfish: "models/blendswap/blueface_angelfish.glb",
     goldfish: "models/goldfish.glb",
     guppy: "models/guppy.glb",
     fish1: "models/quaternius/glb/Fish1.glb",
     fish2: "models/quaternius/glb/Fish2.glb",
     fish3: "models/quaternius/glb/Fish3.glb",
+    neon_tetra: "models/blendswap/neon_tetra.glb",
+    oscar: "models/blendswap/oscar_cichlid.glb",
+    knifefish: "models/blendswap/ghost_knifefish.glb",
+    clownfish: "models/blendswap/clownfish.glb",
   };
   return urls[sp];
 }