refactor: rename core-public -> engine-public; fold helpers in; drop shared

Tighten the package model around the determinism invariant: everything the
engine imports must itself be deterministic.

- Rename core-public -> engine-public (package, dir, `engine-public/*` alias,
  all 118 import sites). It is the deterministic public surface the engine
  depends on and that client/server also use.
- Move the pure formatting helpers (renderNumber/renderTroops) from shared
  into engine-public/format — the engine uses them and they're deterministic.
- Drop the now-empty shared package (and its alias). `shared` was intended for
  client/server-shared, engine-forbidden code; there is none yet, so it is
  removed and can be re-added when such code appears.

Final graph: engine-public (leaf) <- engine <- {client, server};
client/server also -> engine-public.

Verified: tsc clean; 1364 + 65 tests pass; prod build succeeds; engine-public
is a leaf; engine has no client/server imports. Lockfile regenerated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/Attack.test.ts

@@ -9,7 +9,7 @@ import {
   UnitType,
 } from "engine/game/Game";
 import { TileRef } from "engine/game/GameMap";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 import { TestConfig } from "./util/TestConfig";
 import { constructionExecution } from "./util/utils";

tests/AttackStats.test.ts

@@ -1,6 +1,6 @@
 import { AttackExecution } from "engine/execution/AttackExecution";
 import { Game, Player, PlayerInfo, PlayerType } from "engine/game/Game";
-import { GOLD_INDEX_WAR, GOLD_INDEX_WORK } from "core-public/StatsSchemas";
+import { GOLD_INDEX_WAR, GOLD_INDEX_WORK } from "engine-public/StatsSchemas";
 import { setup } from "./util/Setup";
 
 let game: Game;

tests/ConquerGold.test.ts

@@ -1,6 +1,6 @@
 import { SpawnExecution } from "engine/execution/SpawnExecution";
 import { Game, Player, PlayerInfo, PlayerType } from "engine/game/Game";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 
 const gameID: GameID = "test_game";

tests/CosmeticRelationship.test.ts

@@ -1,5 +1,5 @@
 import { cosmeticRelationship } from "client/Cosmetics";
-import { UserMeResponse } from "core-public/ApiSchemas";
+import { UserMeResponse } from "engine-public/ApiSchemas";
 
 const product = { productId: "prod_123", priceId: "price_123", price: "$4.99" };
 

tests/DeleteUnitExecution.test.ts

@@ -9,7 +9,7 @@ import {
   UnitType,
 } from "engine/game/Game";
 import { TileRef } from "engine/game/GameMap";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 import { executeTicks } from "./util/utils";
 

tests/Donate.test.ts

@@ -2,7 +2,7 @@ import { DonateGoldExecution } from "engine/execution/DonateGoldExecution";
 import { DonateTroopsExecution } from "engine/execution/DonateTroopExecution";
 import { SpawnExecution } from "engine/execution/SpawnExecution";
 import { PlayerInfo, PlayerType } from "engine/game/Game";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 
 describe("Donate troops to an ally", () => {

tests/GameInfoRanking.test.ts

@@ -9,14 +9,14 @@ import {
   GameMode,
   GameType,
 } from "engine/game/Game";
-import { AnalyticsRecord, GameConfig } from "core-public/Schemas";
+import { AnalyticsRecord, GameConfig } from "engine-public/Schemas";
 import {
   GOLD_INDEX_STEAL,
   GOLD_INDEX_TRADE,
   GOLD_INDEX_TRAIN_OTHER,
   GOLD_INDEX_TRAIN_SELF,
   GOLD_INDEX_WAR,
-} from "core-public/StatsSchemas";
+} from "engine-public/StatsSchemas";
 
 describe("Ranking class", () => {
   const mockConfig: GameConfig = {

tests/GraphicsOverrides.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, test } from "vitest";
 import {
   GraphicsOverrides,
   GraphicsOverridesSchema,
-} from "core-public/GraphicsOverrides";
+} from "engine-public/GraphicsOverrides";
 import { applyGraphicsOverrides } from "client/render/gl/RenderOverrides";
 import { createRenderSettings } from "client/render/gl/RenderSettings";
 

tests/LobbySocket.test.ts

@@ -4,7 +4,7 @@ import {
   PublicGameInfo,
   PublicGames,
   PublicGameType,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 
 function lobby(
   gameID: string,

tests/MissileSilo.test.ts

@@ -9,7 +9,7 @@ import {
   UnitType,
 } from "engine/game/Game";
 import { TileRef } from "engine/game/GameMap";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 import { constructionExecution, executeTicks } from "./util/utils";
 

tests/NationCreation.test.ts

@@ -12,7 +12,7 @@ import {
   Nation as ManifestNation,
 } from "engine/game/TerrainMapLoader";
 import { PseudoRandom } from "engine/PseudoRandom";
-import { GameConfig, GameStartInfo } from "core-public/Schemas";
+import { GameConfig, GameStartInfo } from "engine-public/Schemas";
 
 function makeManifestNations(count: number): ManifestNation[] {
   const result: ManifestNation[] = [];

tests/ResolveCosmetics.test.ts

@@ -1,6 +1,6 @@
 import { resolveCosmetics } from "client/Cosmetics";
-import { UserMeResponse } from "core-public/ApiSchemas";
-import { Cosmetics } from "core-public/CosmeticSchemas";
+import { UserMeResponse } from "engine-public/ApiSchemas";
+import { Cosmetics } from "engine-public/CosmeticSchemas";
 
 const product = { productId: "prod_1", priceId: "price_1", price: "$4.99" };
 

tests/StatsSchema.test.ts

@@ -1,5 +1,5 @@
-import { PlayerStatsLeafSchema } from "core-public/ApiSchemas";
-import { PlayerStatsSchema } from "core-public/StatsSchemas";
+import { PlayerStatsLeafSchema } from "engine-public/ApiSchemas";
+import { PlayerStatsSchema } from "engine-public/StatsSchemas";
 
 function testPlayerSchema(
   json: string,

tests/TerritoryCapture.test.ts

@@ -1,6 +1,6 @@
 import { SpawnExecution } from "engine/execution/SpawnExecution";
 import { Player, PlayerInfo, PlayerType } from "engine/game/Game";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "./util/Setup";
 
 describe("Territory management", () => {

tests/client/clan/ClanApiQueries.test.ts

@@ -20,7 +20,7 @@ import {
   fetchClanRequests,
   fetchClans,
 } from "client/ClanApi";
-import type { UserMeResponse } from "core-public/ApiSchemas";
+import type { UserMeResponse } from "engine-public/ApiSchemas";
 
 const userWithClans = (tags: string[]): UserMeResponse =>
   ({

tests/client/clan/ClanApiSchemas.test.ts

@@ -9,7 +9,7 @@ import {
   ClanInfoSchema,
   ClanJoinRequestSchema,
   ClanMemberSchema,
-} from "core-public/ClanApiSchemas";
+} from "engine-public/ClanApiSchemas";
 
 describe("ClanInfoSchema", () => {
   const base = {

tests/core/GameRunner.test.ts

@@ -1,7 +1,7 @@
 import { NationExecution } from "engine/execution/NationExecution";
 import { SpawnExecution } from "engine/execution/SpawnExecution";
 import { Cell, Nation, PlayerInfo, PlayerType } from "engine/game/Game";
-import { GameConfig, GameID } from "core-public/Schemas";
+import { GameConfig, GameID } from "engine-public/Schemas";
 import { setup } from "../util/Setup";
 import { executeTicks } from "../util/utils";
 

tests/core/executions/SAMLauncherExecution.test.ts

@@ -9,7 +9,7 @@ import {
   PlayerType,
   UnitType,
 } from "engine/game/Game";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { setup } from "../../util/Setup";
 import { constructionExecution, executeTicks } from "../../util/utils";
 

tests/core/game/GameImpl.test.ts

@@ -1,4 +1,4 @@
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { AttackExecution } from "engine/execution/AttackExecution";
 import { SpawnExecution } from "engine/execution/SpawnExecution";
 //import { TransportShipExecution } from "engine/execution/TransportShipExecution";

tests/core/game/TrainStation.test.ts

@@ -15,7 +15,7 @@ import {
 } from "engine/game/Game";
 import { Cluster, TrainStation } from "engine/game/TrainStation";
 import { UserSettings } from "engine/game/UserSettings";
-import { GameConfig } from "core-public/Schemas";
+import { GameConfig } from "engine-public/Schemas";
 
 vi.mock("engine/game/Game");
 vi.mock("engine/execution/TrainExecution");

tests/core/pathfinding/_fixtures.ts

@@ -11,7 +11,7 @@ import {
 import { createGame as createGameImpl } from "engine/game/GameImpl";
 import { GameMapImpl } from "engine/game/GameMap";
 import { UserSettings } from "engine/game/UserSettings";
-import { GameConfig } from "core-public/Schemas";
+import { GameConfig } from "engine-public/Schemas";
 import { TestConfig } from "../../util/TestConfig";
 
 export const W = "W"; // Water

tests/pathfinding/utils.ts

@@ -27,7 +27,7 @@ import {
   PathStatus,
   SteppingPathFinder,
 } from "engine/pathfinding/types";
-import { GameConfig } from "core-public/Schemas";
+import { GameConfig } from "engine-public/Schemas";
 import { TestConfig } from "../util/TestConfig";
 
 export type BenchmarkRoute = {

tests/server/Archive.test.ts

@@ -20,8 +20,8 @@ vi.mock("server/Logger", () => ({
   },
 }));
 
-vi.mock("core-public/Schemas", async () => {
-  const actual = (await vi.importActual("core-public/Schemas")) as any;
+vi.mock("engine-public/Schemas", async () => {
+  const actual = (await vi.importActual("engine-public/Schemas")) as any;
   return {
     ...actual,
     GameRecordSchema: {
@@ -31,7 +31,7 @@ vi.mock("core-public/Schemas", async () => {
 });
 
 import { GameType } from "engine/game/Game";
-import type { GameRecord } from "core-public/Schemas";
+import type { GameRecord } from "engine-public/Schemas";
 import { archive } from "server/Archive";
 
 function buildRecord(gameType: GameType, flag: string | undefined): GameRecord {

tests/server/GameLifecycle.test.ts

@@ -1,7 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
-vi.mock("core-public/Schemas", async () => {
-  const actual = (await vi.importActual("core-public/Schemas")) as any;
+vi.mock("engine-public/Schemas", async () => {
+  const actual = (await vi.importActual("engine-public/Schemas")) as any;
   return {
     ...actual,
     GameStartInfoSchema: {

tests/server/KickPlayerAuthorization.test.ts

@@ -1,7 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
-vi.mock("core-public/Schemas", async () => {
-  const actual = (await vi.importActual("core-public/Schemas")) as any;
+vi.mock("engine-public/Schemas", async () => {
+  const actual = (await vi.importActual("engine-public/Schemas")) as any;
   return {
     ...actual,
     GameStartInfoSchema: {

tests/util/Setup.ts

@@ -16,7 +16,7 @@ import {
   MapManifest,
 } from "engine/game/TerrainMapLoader";
 import { UserSettings } from "engine/game/UserSettings";
-import { GameConfig } from "core-public/Schemas";
+import { GameConfig } from "engine-public/Schemas";
 import { TestConfig } from "./TestConfig";
 
 export async function setup(

tests/util/viewStubs.ts

@@ -25,7 +25,7 @@ import {
   UnitUpdate,
 } from "engine/game/GameUpdates";
 import { TerrainMapData } from "engine/game/TerrainMapLoader";
-import { Player, PlayerCosmetics } from "core-public/Schemas";
+import { Player, PlayerCosmetics } from "engine-public/Schemas";
 import { WorkerClient } from "engine/worker/WorkerClient";
 
 /** Theme stub — returns deterministic colors so PlayerView's color math works. */