Port evolution, Rare Candy, evolution stones and vitamins

Pokémon that levelled up evolve after a won battle, following
EvolveAfterBattle's checks over the ROM's evolution bytes, with the
evolution screen that B can stop and move learning outside battle. The pack
uses Rare Candy, stones (with ABLE/NOT ABLE labels) and vitamins, and its
pocket tabs now sit in their own row.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/battle-world.test.ts

@@ -54,6 +54,46 @@ describe.skipIf(!existsSync(romPath))("world battle integration with the local R
     expect(world.save()).toEqual(saved);
   });
 
+  it("evolves a Pokémon that levelled up once the battle is won", () => {
+    const world = fixture();
+    const data = world.assets.pokemon;
+    const mon = generatePartyMon(data, {
+      species: 155, level: 13, item: 0, otId: world.playerId,
+      ot: "CHRIS", dvs: 0x823b, caughtData: 0,
+    });
+    mon.exp = data.expAtLevel(data.baseData(155).growthRate, 14) - 1;
+    world.state.party[0] = mon;
+    encounter(world);
+    const messages = finish(world);
+    expect(world.notice, world.diagnostic).toBe("");
+    expect(messages).toContain("What? CYNDAQUIL\nis evolving!");
+    expect(messages).toContain("evolved into\nQUILAVA!");
+    const evolved = world.state.party[0];
+    expect([evolved.species, evolved.nickname, evolved.level]).toEqual([156, "QUILAVA", 14]);
+    expect(evolved.stats).toEqual(calcStats(data, 156, evolved.dvs, 14, evolved.statExp));
+    expect(world.state.pokedex.caught.has(156)).toBe(true);
+    const saved = world.save();
+    world.restore(saved);
+    expect(world.save()).toEqual(saved);
+  });
+
+  it("considers only the Pokémon that levelled up (wEvolvableFlags)", () => {
+    const world = fixture();
+    const data = world.assets.pokemon;
+    // A level-14 Cyndaquil that does not take part could evolve, but
+    // EvolveAfterBattle only checks the one that grew to level 6.
+    world.state.party.push(generatePartyMon(data, {
+      species: 155, level: 14, item: 0, otId: world.playerId,
+      ot: "CHRIS", dvs: 0x823b, caughtData: 0,
+    }));
+    encounter(world);
+    const messages = finish(world);
+    expect(world.notice, world.diagnostic).toBe("");
+    expect(world.state.party[0].level).toBe(6);
+    expect(messages).not.toContain("evolving");
+    expect(world.state.party.map((mon) => mon.species)).toEqual([155, 155]);
+  });
+
   it("struggles with recoil once every move is out of PP", () => {
     const world = fixture();
     world.state.party[0].pp = [0, 0, 0, 0];