ui/phase-17: ship-class CRUD without calc

Phase 17 lights up the ship-class table and designer active views,
extends the order-draft pipeline with createShipClass and
removeShipClass commands, and projects pending Save/Delete actions
through applyOrderOverlay so the table reflects the player's
intent before auto-sync lands. The plan is corrected in the same
patch: per game/rules.txt, ship classes are designed once and
cannot be edited — the engine has no Update command, so the UI
exposes only Create + Delete.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/tests/e2e/fixtures/order-fbs.ts

@@ -16,6 +16,8 @@ import {
 	CommandPlanetRename,
 	CommandPlanetRouteRemove,
 	CommandPlanetRouteSet,
+	CommandShipClassCreate,
+	CommandShipClassRemove,
 	PlanetProduction,
 	PlanetRouteLoadType,
 	UserGamesOrder,
@@ -65,11 +67,28 @@ export interface RemoveCargoRouteResultFixture
 	loadType: "COL" | "CAP" | "MAT" | "EMP";
 }
 
+export interface CreateShipClassResultFixture extends CommandResultFixtureBase {
+	kind: "createShipClass";
+	name: string;
+	drive: number;
+	armament: number;
+	weapons: number;
+	shields: number;
+	cargo: number;
+}
+
+export interface RemoveShipClassResultFixture extends CommandResultFixtureBase {
+	kind: "removeShipClass";
+	name: string;
+}
+
 export type CommandResultFixture =
 	| PlanetRenameResultFixture
 	| SetProductionTypeResultFixture
 	| SetCargoRouteResultFixture
-	| RemoveCargoRouteResultFixture;
+	| RemoveCargoRouteResultFixture
+	| CreateShipClassResultFixture
+	| RemoveShipClassResultFixture;
 
 export function buildOrderResponsePayload(
 	gameId: string,
@@ -173,6 +192,29 @@ function encodeItem(builder: Builder, c: CommandResultFixture): number {
 			payloadType = CommandPayload.CommandPlanetRouteRemove;
 			break;
 		}
+		case "createShipClass": {
+			const nameOffset = builder.createString(c.name);
+			inner = CommandShipClassCreate.createCommandShipClassCreate(
+				builder,
+				nameOffset,
+				c.drive,
+				BigInt(c.armament),
+				c.weapons,
+				c.shields,
+				c.cargo,
+			);
+			payloadType = CommandPayload.CommandShipClassCreate;
+			break;
+		}
+		case "removeShipClass": {
+			const nameOffset = builder.createString(c.name);
+			inner = CommandShipClassRemove.createCommandShipClassRemove(
+				builder,
+				nameOffset,
+			);
+			payloadType = CommandPayload.CommandShipClassRemove;
+			break;
+		}
 	}
 	CommandItem.startCommandItem(builder);
 	CommandItem.addCmdId(builder, cmdIdOffset);