Move map metadata into info.json and generate map TypeScript from it (#4227)

**Add approved & assigned issue number here:**

N/A — maintainer refactor.

## Description:

Makes each map's `info.json` the single source of truth for map metadata
— adding a map is now a folder with `image.png` + `info.json`, a
`gen-maps` run, and an en.json display name.

**info.json / manifest.json carry full map metadata.** Every
`map-generator/assets/maps/<map>/info.json` declares `id` (the
`GameMapType` enum key), `name` (the enum value — wire format, unchanged
for all 94 maps), `translation_key`, `categories`, and
`multiplayer_frequency` (the public-playlist weight that used to be the
`FREQUENCY` record in MapPlaylist.ts). The generator validates
everything and mirrors it into `resources/maps/<map>/manifest.json`. 23
stale info.json `name` values were normalized to the canonical enum
value; enum values are byte-identical, so replays and stored game
configs are unaffected.

**The generator emits the TypeScript and discovers maps itself.** New
`map-generator/codegen.go` generates `src/core/game/Maps.gen.ts`
(`GameMapType`, `GameMapName`, `mapCategories`, `mapTranslationKeys`,
`multiplayerFrequency` — now a full `Record<GameMapName, number>`,
killing the old `Partial`) on every run; `Game.ts` re-exports it. The
hardcoded map registry in `main.go` is gone — maps are auto-discovered
from the `assets/maps` / `assets/test_maps` directories. MapConsistency
tests fail with a "run `npm run gen-maps`" message if info.json,
manifest.json, and Maps.gen.ts drift. The tracked
`map-generator/map-generator` binary is rebuilt to match.

**New categories: continents + world/cosmic/tournament/other,
multi-category support.** `continental`/`regional`/`fantasy`/`arcade`
are replaced by `featured`, `world`, `europe`, `asia`, `north_america`,
`africa`, `south_america`, `oceania`, `antarctica`, `cosmic`,
`tournament`, and `other`. Maps can list multiple categories, so
straddlers (Black Sea, Bosphorus, Caucasus, Between Two Seas, Bering
Sea/Strait, Mena, Strait of Gibraltar, Hawaii, Arctic) appear under both
regions. Featured is itself a category (same 7 maps as before).
MapPlaylist keeps its arcade exclusion via an explicit set.

**Map picker UI.** Two tabs: **Featured** (default — featured maps plus
a Favorites section when maps are starred) and **All** (one prominent
collapsible bar per category with a map count, collapsed by default).
The selected map is prepended to the featured grid when it lives
elsewhere. `getMapName()` resolves through the generated
`mapTranslationKeys`, which also fixes tourney maps never resolving a
valid translation key.

## Please complete the following:

- [ ] I have added screenshots for all UI updates (maintainer change —
picker described above)
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evanpelle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/server/MapPlaylist.ts

@@ -8,12 +8,12 @@ import {
   GameMode,
   GameType,
   HumansVsNations,
+  multiplayerFrequency,
   PublicGameModifiers,
   Quads,
   RankedType,
   Trios,
   UnitType,
-  mapCategories,
 } from "../core/game/Game";
 import { PseudoRandom } from "../core/PseudoRandom";
 import { GameConfig, PublicGameType, TeamCountConfig } from "../core/Schemas";
@@ -22,102 +22,21 @@ import { getMapLandTiles } from "./MapLandTiles";
 
 const log = logger.child({});
 
-const ARCADE_MAPS = new Set(mapCategories.arcade);
+// Arcade-style maps only appear in the "special" playlist.
+const ARCADE_MAPS = new Set<GameMapType>([
+  GameMapType.TheBox,
+  GameMapType.ChoppingBlock,
+  GameMapType.Didier,
+  GameMapType.DidierFrance,
+  GameMapType.Labyrinth,
+  GameMapType.Sierpinski,
+  GameMapType.Onion,
+]);
 const SPECIAL_ONLY_MAPS = new Set<GameMapType>([GameMapType.ArchipelagoSea]);
 
 // Hard cap on player count for performance. Applied after compact-map reduction.
 const MAX_PLAYER_COUNT = 125;
 
-// How many times each map should appear in the playlist.
-// Note: The Partial should eventually be removed for better type safety.
-const FREQUENCY: Partial<Record<GameMapName, number>> = {
-  Achiran: 5,
-  Aegean: 6,
-  Africa: 7,
-  Alps: 4,
-  AmazonRiver: 3,
-  Antarctica: 1,
-  ArchipelagoSea: 3,
-  Arctic: 6,
-  Asia: 6,
-  Australia: 4,
-  Baikal: 5,
-  BajaCalifornia: 4,
-  Balkans: 6,
-  BeringSea: 5,
-  BeringStrait: 2,
-  BetweenTwoSeas: 5,
-  BlackSea: 6,
-  BosphorusStraits: 3,
-  Britannia: 5,
-  Caribbean: 5,
-  Caucasus: 5,
-  ChoppingBlock: 5,
-  Conakry: 3,
-  DanishStraits: 5,
-  DeglaciatedAntarctica: 4,
-  Didier: 1,
-  DidierFrance: 1,
-  Dyslexdria: 8,
-  EastAsia: 5,
-  Europe: 7,
-  FalklandIslands: 4,
-  FaroeIslands: 4,
-  FourIslands: 4,
-  GatewayToTheAtlantic: 5,
-  GreatLakes: 6,
-  GulfOfStLawrence: 4,
-  Halkidiki: 4,
-  Hawaii: 4,
-  HongKong: 6,
-  Iceland: 4,
-  IndianSubcontinent: 8,
-  Italia: 6,
-  Japan: 6,
-  JuanDeFucaStrait: 4,
-  Korea: 5,
-  Labyrinth: 6,
-  Lemnos: 3,
-  Lisbon: 4,
-  LosAngeles: 8,
-  Luna: 6,
-  Manicouagan: 4,
-  MareNostrum: 6,
-  Mars: 3,
-  Mena: 6,
-  MiddleEast: 8,
-  MilkyWay: 8,
-  MississippiRiver: 3,
-  Montreal: 6,
-  NewYorkCity: 3,
-  NileDelta: 4,
-  NorthAmerica: 5,
-  NorthwestPassage: 5,
-  Pangaea: 5,
-  Passage: 4,
-  Onion: 2,
-  Pluto: 6,
-  SanFrancisco: 3,
-  Sierpinski: 10,
-  SouthAmerica: 5,
-  SoutheastAsia: 5,
-  StraitOfGibraltar: 5,
-  StraitOfHormuz: 4,
-  StraitOfMalacca: 4,
-  Surrounded: 4,
-  Svalmel: 8,
-  TaiwanStrait: 5,
-  TheBox: 3,
-  Titan: 3,
-  TradersDream: 4,
-  TwoLakes: 6,
-  Venice: 6,
-  World: 20,
-  WorldInverted: 8,
-  YellowSea: 5,
-  Yenisei: 6,
-};
-
 const TEAM_WEIGHTS: { config: TeamCountConfig; weight: number }[] = [
   { config: 2, weight: 10 },
   { config: 3, weight: 10 },
@@ -587,7 +506,7 @@ export class MapPlaylist {
       ) {
         return;
       }
-      let freq = FREQUENCY[key] ?? 0;
+      let freq = multiplayerFrequency[key];
       // Boost frequency for special team maps in the team playlist
       if (type === "team" && SPECIAL_TEAM_MAPS.has(map)) {
         freq *= SPECIAL_TEAM_FREQ_MULTIPLIER;