ui/phase-15: planet inspector production controls + order-draft collapse

Adds the second end-to-end command (`setProductionType`) with a
collapse-by-`planetNumber` rule on the order draft, the segmented
production-controls component on the planet inspector, the FBS
encoder/decoder pair for `CommandPlanetProduce`, and the
`localShipClass` projection on `GameReport`. Forecast number is
deferred and tracked in the new `ui/docs/calc-bridge.md`.

ui/frontend/src/sync/submit.ts

@@ -27,11 +27,13 @@ import { UUID } from "../proto/galaxy/fbs/common";
 import {
 	CommandItem,
 	CommandPayload,
+	CommandPlanetProduce,
 	CommandPlanetRename,
+	PlanetProduction,
 	UserGamesOrder,
 	UserGamesOrderResponse,
 } from "../proto/galaxy/fbs/order";
-import type { OrderCommand } from "./order-types";
+import type { OrderCommand, ProductionType } from "./order-types";
 
 const MESSAGE_TYPE = "user.games.order";
 
@@ -148,6 +150,19 @@ function encodeCommandPayload(
 				payloadOffset: offset,
 			};
 		}
+		case "setProductionType": {
+			const subjectOffset = builder.createString(cmd.subject);
+			const offset = CommandPlanetProduce.createCommandPlanetProduce(
+				builder,
+				BigInt(cmd.planetNumber),
+				productionTypeToFBS(cmd.productionType),
+				subjectOffset,
+			);
+			return {
+				payloadType: CommandPayload.CommandPlanetProduce,
+				payloadOffset: offset,
+			};
+		}
 		case "placeholder":
 			throw new SubmitError(
 				"invalid_request",
@@ -157,6 +172,34 @@ function encodeCommandPayload(
 	}
 }
 
+/**
+ * productionTypeToFBS converts the wire-stable `ProductionType` literal
+ * to the FlatBuffers enum value. Mirrors `planetProductionToFBS` in
+ * `pkg/transcoder/order.go`. The two sides are kept in lock-step so the
+ * gateway can decode whatever the frontend produces without a
+ * translation step.
+ */
+export function productionTypeToFBS(value: ProductionType): PlanetProduction {
+	switch (value) {
+		case "MAT":
+			return PlanetProduction.MAT;
+		case "CAP":
+			return PlanetProduction.CAP;
+		case "DRIVE":
+			return PlanetProduction.DRIVE;
+		case "WEAPONS":
+			return PlanetProduction.WEAPONS;
+		case "SHIELDS":
+			return PlanetProduction.SHIELDS;
+		case "CARGO":
+			return PlanetProduction.CARGO;
+		case "SCIENCE":
+			return PlanetProduction.SCIENCE;
+		case "SHIP":
+			return PlanetProduction.SHIP;
+	}
+}
+
 function decodeOrderResponse(
 	payload: Uint8Array,
 	commands: OrderCommand[],