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/src/sync/order-load.ts

@@ -16,6 +16,8 @@ import {
 	CommandPlanetRename,
 	CommandPlanetRouteRemove,
 	CommandPlanetRouteSet,
+	CommandShipClassCreate,
+	CommandShipClassRemove,
 	PlanetProduction,
 	PlanetRouteLoadType,
 	UserGamesOrderGet,
@@ -197,6 +199,29 @@ function decodeCommand(item: CommandItemView): OrderCommand | null {
 				loadType,
 			};
 		}
+		case CommandPayload.CommandShipClassCreate: {
+			const inner = new CommandShipClassCreate();
+			item.payload(inner);
+			return {
+				kind: "createShipClass",
+				id,
+				name: inner.name() ?? "",
+				drive: inner.drive(),
+				armament: Number(inner.armament()),
+				weapons: inner.weapons(),
+				shields: inner.shields(),
+				cargo: inner.cargo(),
+			};
+		}
+		case CommandPayload.CommandShipClassRemove: {
+			const inner = new CommandShipClassRemove();
+			item.payload(inner);
+			return {
+				kind: "removeShipClass",
+				id,
+				name: inner.name() ?? "",
+			};
+		}
 		default:
 			console.warn(
 				`fetchOrder: skipping unknown command kind (payloadType=${payloadType})`,