Breed at the Day-Care, hatch Eggs, draw MAIL stationery and browse the Hall of Fame (Closes #29)

- Day-Care and breeding: deposits, withdrawal pricing and growth,
  compatibility, egg species, DVs and moves, DayCareStep, egg
  collection and the Odd Egg, compared with the cartridge's routines.
- CountStep: walking happiness, DoEggStep, DayCareStep and DoBikeStep
  in the original's order; HatchEggs with the ROM's hatch animation,
  compared frame by frame with the original.
- MAIL: all ten stationery types and the Portrait MAIL picture,
  compared with the cartridge's tilemaps, graphics and palettes.
- Printing: Bill's PC boxes, Pokedex PRNT, MAIL and the Photo Studio
  take the original's absent-printer path.
- Hall of Fame records (saved apart from the League flag, ready for the
  League to call) and the Hall of Fame PC, compared with the cartridge's
  _HallOfFamePC on 255 pages.

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

src/main.ts

@@ -415,8 +415,7 @@ function mailField(answer: (message: string) => void): HTMLElement[] {
   box.append(...lines);
   return [box, ok];
 }
-/** ReadAnyMail: the message at its two lines and the author below. The
- * stationery's graphics are not drawn. */
+/** ReadAnyMail: cartridge stationery plus accessible message text. */
 function showMail(world: GameWorld) {
   const mail = world.mailView;
   get("mail-view").hidden = !mail;
@@ -424,6 +423,8 @@ function showMail(world: GameWorld) {
   get("mail-type").textContent = world.assets.pokemon.itemName(mail.type);
   get("mail-message").textContent = mail.message;
   get("mail-author").textContent = mail.author;
+  const choice = world.dialogue?.choice;
+  if (choice?.kind === "screen") drawTileScreen(get<HTMLCanvasElement>("mail-canvas"), choice.screen, 0);
 }
 type MartChoice = Extract<
   Choice,
@@ -1349,7 +1350,7 @@ let tileScreenKey = "";
  * world's frames. */
 function showTileScreen(world: GameWorld) {
   const choice = world.dialogue?.choice;
-  const screen = choice?.kind === "screen" ? choice.screen : undefined;
+  const screen = choice?.kind === "screen" && !world.mailView ? choice.screen : undefined;
   get("tile-screen").hidden = !screen;
   get("tile-screen").classList.toggle("overlay", Boolean(screen?.overlay));
   if (!screen) {