battle-fetch: migrate to user.games.battle ConnectRPC command

The Phase 27 BattleViewer was the last UI surface still issuing raw
fetch() against the backend REST contract (`/api/v1/user/games/...
/battles/...`). The dev-deploy gateway never proxied that path, so
the viewer worked only in tools/local-dev/. Move it onto the signed
ConnectRPC channel every other authenticated surface already uses.

Wire pieces:
- FBS GameBattleRequest in pkg/schema/fbs/battle.fbs, regenerated
  Go + TS bindings.
- MessageTypeUserGamesBattle constant + GameBattleRequest struct in
  pkg/model/report/messages.go.
- pkg/transcoder/battle.go gains GameBattleRequestToPayload and
  PayloadToGameBattleRequest helpers.
- gateway games_commands.go switches on the new message type and
  GETs /api/v1/user/games/{id}/battles/{turn}/{battle_id}; the JSON
  response is re-encoded as a FlatBuffers BattleReport before being
  returned. 404 from backend surfaces as the canonical `not_found`
  gateway error.
- ui/frontend/src/api/battle-fetch.ts now builds the FBS request,
  calls GalaxyClient.executeCommand, and decodes the FBS response
  into the existing UI shape (Record<string,string> race/ship maps,
  string-form UUID). BattleFetchError carries an HTTP-style status
  derived from the result code so the active-view's not_found branch
  keeps working.
- battle.svelte pulls the GalaxyClient from the in-game shell
  context. While the layout's boot Promise.all is in flight the
  effect stays in `loading` until the client handle becomes
  non-null.
- ui/Makefile FBS_INPUTS gains battle.fbs.

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

ui/frontend/src/api/battle-fetch.ts

@@ -1,21 +1,33 @@
 // Battle-report fetcher used by the Battle Viewer page.
 //
-// Phase 27 ships the BattleViewer as a logically isolated component
-// that accepts a `BattleReport` matching `pkg/model/report/battle.go`.
-// This module owns the type mirror and a single `fetchBattle` entry
-// point. In synthetic mode (development & e2e fixtures), the loader
-// falls back to a local fixture so the UI tests don't depend on a
-// running engine; otherwise it issues a real `GET` against the
-// backend gateway route added in Phase 27 step 3.
+// Phase 28 migrates this surface off the raw REST passthrough onto the
+// `user.games.battle` ConnectRPC command — the same signed envelope the
+// other authenticated traffic rides. The synthetic-mode short-circuit
+// stays so DEV / e2e tests can render fixtures without a live gateway.
 
+import { Builder, ByteBuffer } from "flatbuffers";
+
+import type { GalaxyClient } from "./galaxy-client";
+import { uuidToHiLo } from "./game-state";
 import { isSyntheticGameId } from "./synthetic-report";
 import { lookupSyntheticBattle } from "./synthetic-battle";
+import {
+	BattleActionReport as FbsBattleActionReport,
+	BattleReport as FbsBattleReport,
+	BattleReportGroup as FbsBattleReportGroup,
+	GameBattleRequest,
+	RaceEntry,
+	ShipEntry,
+	UUID,
+} from "../proto/galaxy/fbs/battle";
+import { ErrorResponse as FbsErrorResponse } from "../proto/galaxy/fbs/lobby";
 
 /**
- * BattleReport is the wire shape returned by the engine endpoint
- * `GET /api/v1/battle/:turn/:uuid` and forwarded by the backend
- * gateway as `GET /api/v1/user/games/{game_id}/battles/{turn}/{battle_id}`.
- * Fields mirror `pkg/model/report/battle.go`.
+ * BattleReport mirrors the on-wire battle shape the BattleViewer
+ * renders. Fields match `pkg/model/report/battle.go`; integer-keyed
+ * maps from the underlying model are surfaced as string-keyed
+ * `Record`s so the existing components (race / ship lookup, mass
+ * scaling, timeline) keep their current types.
  */
 export interface BattleReport {
 	id: string;
@@ -46,20 +58,28 @@ export interface BattleActionReport {
 }
 
 export class BattleFetchError extends Error {
-	constructor(public readonly status: number, message: string) {
+	constructor(
+		public readonly status: number,
+		message: string,
+	) {
 		super(message);
 		this.name = "BattleFetchError";
 	}
 }
 
+const MESSAGE_TYPE = "user.games.battle";
+const RESULT_CODE_OK = "ok";
+
 /**
  * fetchBattle returns the `BattleReport` for the supplied game, turn,
  * and battle id. In synthetic-report mode (DEV / e2e) the lookup is
  * served from `synthetic-battle.ts`; otherwise the function calls the
- * backend gateway route. Throws `BattleFetchError` with the upstream
- * status on validation or transport failure.
+ * `user.games.battle` ConnectRPC command through the supplied
+ * `GalaxyClient`. Throws `BattleFetchError` with the upstream HTTP
+ * status (or `0` for transport-level failures) on error.
  */
 export async function fetchBattle(
+	client: GalaxyClient,
 	gameId: string,
 	turn: number,
 	battleId: string,
@@ -71,18 +91,171 @@ export async function fetchBattle(
 		}
 		return fixture;
 	}
-	const path = `/api/v1/user/games/${encodeURIComponent(gameId)}/battles/${turn}/${encodeURIComponent(battleId)}`;
-	const response = await fetch(path, {
-		headers: { Accept: "application/json" },
-	});
-	if (response.status === 404) {
-		throw new BattleFetchError(404, "battle not found");
+
+	const payload = encodeRequest(gameId, turn, battleId);
+	const result = await client.executeCommand(MESSAGE_TYPE, payload);
+	if (result.resultCode !== RESULT_CODE_OK) {
+		throw decodeError(result.resultCode, result.payloadBytes);
 	}
-	if (!response.ok) {
-		throw new BattleFetchError(
-			response.status,
-			`battle fetch failed: ${response.status}`,
-		);
-	}
-	return (await response.json()) as BattleReport;
+	return decodeBattleReport(result.payloadBytes);
+}
+
+function encodeRequest(
+	gameId: string,
+	turn: number,
+	battleId: string,
+): Uint8Array {
+	const builder = new Builder(96);
+	const [gameHi, gameLo] = uuidToHiLo(gameId);
+	const [battleHi, battleLo] = uuidToHiLo(battleId);
+	GameBattleRequest.startGameBattleRequest(builder);
+	GameBattleRequest.addGameId(
+		builder,
+		UUID.createUUID(builder, gameHi, gameLo),
+	);
+	GameBattleRequest.addTurn(builder, turn);
+	GameBattleRequest.addBattleId(
+		builder,
+		UUID.createUUID(builder, battleHi, battleLo),
+	);
+	builder.finish(GameBattleRequest.endGameBattleRequest(builder));
+	return builder.asUint8Array();
+}
+
+function decodeError(resultCode: string, payload: Uint8Array): BattleFetchError {
+	let message = resultCode;
+	try {
+		const errorResponse = FbsErrorResponse.getRootAsErrorResponse(
+			new ByteBuffer(payload),
+		);
+		const body = errorResponse.error();
+		if (body) {
+			message = body.message() ?? resultCode;
+		}
+	} catch (_err) {
+		// fall through to the raw result code
+	}
+	const status = mapResultCodeToStatus(resultCode);
+	return new BattleFetchError(status, message);
+}
+
+function mapResultCodeToStatus(resultCode: string): number {
+	switch (resultCode) {
+		case "not_found":
+			return 404;
+		case "invalid_request":
+			return 400;
+		case "forbidden":
+			return 403;
+		case "conflict":
+			return 409;
+		case "service_unavailable":
+			return 503;
+		default:
+			return 500;
+	}
+}
+
+function decodeBattleReport(bytes: Uint8Array): BattleReport {
+	const fb = FbsBattleReport.getRootAsBattleReport(new ByteBuffer(bytes));
+	const id = uuidStringFromFB(fb.id());
+	if (id === null) {
+		throw new BattleFetchError(500, "battle response missing id");
+	}
+	return {
+		id,
+		planet: Number(fb.planet()),
+		planetName: fb.planetName() ?? "",
+		races: decodeRaces(fb),
+		ships: decodeShips(fb),
+		protocol: decodeProtocol(fb),
+	};
+}
+
+function decodeRaces(fb: FbsBattleReport): Record<string, string> {
+	const out: Record<string, string> = {};
+	const total = fb.racesLength();
+	const item = new RaceEntry();
+	for (let i = 0; i < total; i++) {
+		if (!fb.races(i, item)) continue;
+		const valueUUID = item.value();
+		const value = uuidStringFromFB(valueUUID);
+		if (value === null) continue;
+		out[item.key().toString()] = value;
+	}
+	return out;
+}
+
+function decodeShips(fb: FbsBattleReport): Record<string, BattleReportGroup> {
+	const out: Record<string, BattleReportGroup> = {};
+	const total = fb.shipsLength();
+	const entry = new ShipEntry();
+	for (let i = 0; i < total; i++) {
+		if (!fb.ships(i, entry)) continue;
+		const group = entry.value();
+		if (group === null) continue;
+		out[entry.key().toString()] = decodeGroup(group);
+	}
+	return out;
+}
+
+function decodeGroup(group: FbsBattleReportGroup): BattleReportGroup {
+	const tech: Record<string, number> = {};
+	const techLen = group.techLength();
+	for (let i = 0; i < techLen; i++) {
+		const t = group.tech(i);
+		if (!t) continue;
+		const key = t.key();
+		if (key === null) continue;
+		tech[key] = t.value();
+	}
+	return {
+		race: (group.race() ?? "") as string,
+		className: (group.className() ?? "") as string,
+		tech,
+		num: Number(group.number()),
+		numLeft: Number(group.numberLeft()),
+		loadType: (group.loadType() ?? "") as string,
+		loadQuantity: group.loadQuantity(),
+		inBattle: group.inBattle(),
+	};
+}
+
+function decodeProtocol(fb: FbsBattleReport): BattleActionReport[] {
+	const out: BattleActionReport[] = [];
+	const total = fb.protocolLength();
+	const item = new FbsBattleActionReport();
+	for (let i = 0; i < total; i++) {
+		if (!fb.protocol(i, item)) continue;
+		out.push({
+			a: Number(item.attacker()),
+			sa: Number(item.attackerShipClass()),
+			d: Number(item.defender()),
+			sd: Number(item.defenderShipClass()),
+			x: item.destroyed(),
+		});
+	}
+	return out;
+}
+
+function uuidStringFromFB(uuid: UUID | null): string | null {
+	if (uuid === null) return null;
+	const hi = uuid.hi();
+	const lo = uuid.lo();
+	const hex = bigUintTo16Hex(hi) + bigUintTo16Hex(lo);
+	return (
+		hex.slice(0, 8) +
+		"-" +
+		hex.slice(8, 12) +
+		"-" +
+		hex.slice(12, 16) +
+		"-" +
+		hex.slice(16, 20) +
+		"-" +
+		hex.slice(20, 32)
+	);
+}
+
+function bigUintTo16Hex(value: bigint): string {
+	return value.toString(16).padStart(16, "0");
 }

ui/frontend/src/lib/active-view/battle.svelte

@@ -25,6 +25,10 @@ viewer keeps its prop-driven contract.
 		RENDERED_REPORT_CONTEXT_KEY,
 		type RenderedReportSource,
 	} from "$lib/rendered-report.svelte";
+	import {
+		GALAXY_CLIENT_CONTEXT_KEY,
+		type GalaxyClientHandle,
+	} from "$lib/galaxy-client-context.svelte";
 	import {
 		MapShipClassLookup,
 		type ShipClassLookup,
@@ -46,6 +50,9 @@ viewer keeps its prop-driven contract.
 	const rendered = getContext<RenderedReportSource | undefined>(
 		RENDERED_REPORT_CONTEXT_KEY,
 	);
+	const galaxyClient = getContext<GalaxyClientHandle | undefined>(
+		GALAXY_CLIENT_CONTEXT_KEY,
+	);
 
 	const shipClassLookup = $derived.by<ShipClassLookup>(() => {
 		const map = new Map<string, ShipClassRef>();
@@ -85,8 +92,16 @@ viewer keeps its prop-driven contract.
 			state = { kind: "not_found" };
 			return;
 		}
+		const client = galaxyClient?.client ?? null;
+		if (!client) {
+			// Layout populates the client after the boot Promise.all
+			// resolves; stay in `loading` so the effect re-runs once
+			// the handle becomes non-null.
+			state = { kind: "loading" };
+			return;
+		}
 		state = { kind: "loading" };
-		fetchBattle(gameId, turn, battleId)
+		fetchBattle(client, gameId, turn, battleId)
 			.then((report) => {
 				state = { kind: "ready", report };
 			})

ui/frontend/src/proto/galaxy/fbs/battle.ts

@@ -0,0 +1,12 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+export { BattleActionReport, BattleActionReportT } from './battle/battle-action-report.js';
+export { BattleReport, BattleReportT } from './battle/battle-report.js';
+export { BattleReportGroup, BattleReportGroupT } from './battle/battle-report-group.js';
+export { GameBattleRequest, GameBattleRequestT } from './battle/game-battle-request.js';
+export { RaceEntry, RaceEntryT } from './battle/race-entry.js';
+export { ShipEntry, ShipEntryT } from './battle/ship-entry.js';
+export { TechEntry, TechEntryT } from './battle/tech-entry.js';
+export { UUID, UUIDT } from './battle/uuid.js';

ui/frontend/src/proto/galaxy/fbs/battle/battle-action-report.ts

@@ -0,0 +1,130 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class BattleActionReport implements flatbuffers.IUnpackableObject<BattleActionReportT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BattleActionReport {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsBattleActionReport(bb:flatbuffers.ByteBuffer, obj?:BattleActionReport):BattleActionReport {
+  return (obj || new BattleActionReport()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsBattleActionReport(bb:flatbuffers.ByteBuffer, obj?:BattleActionReport):BattleActionReport {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new BattleActionReport()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+attacker():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+attackerShipClass():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+defender():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+defenderShipClass():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+destroyed():boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 12);
+  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
+}
+
+static startBattleActionReport(builder:flatbuffers.Builder) {
+  builder.startObject(5);
+}
+
+static addAttacker(builder:flatbuffers.Builder, attacker:bigint) {
+  builder.addFieldInt64(0, attacker, BigInt('0'));
+}
+
+static addAttackerShipClass(builder:flatbuffers.Builder, attackerShipClass:bigint) {
+  builder.addFieldInt64(1, attackerShipClass, BigInt('0'));
+}
+
+static addDefender(builder:flatbuffers.Builder, defender:bigint) {
+  builder.addFieldInt64(2, defender, BigInt('0'));
+}
+
+static addDefenderShipClass(builder:flatbuffers.Builder, defenderShipClass:bigint) {
+  builder.addFieldInt64(3, defenderShipClass, BigInt('0'));
+}
+
+static addDestroyed(builder:flatbuffers.Builder, destroyed:boolean) {
+  builder.addFieldInt8(4, +destroyed, +false);
+}
+
+static endBattleActionReport(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createBattleActionReport(builder:flatbuffers.Builder, attacker:bigint, attackerShipClass:bigint, defender:bigint, defenderShipClass:bigint, destroyed:boolean):flatbuffers.Offset {
+  BattleActionReport.startBattleActionReport(builder);
+  BattleActionReport.addAttacker(builder, attacker);
+  BattleActionReport.addAttackerShipClass(builder, attackerShipClass);
+  BattleActionReport.addDefender(builder, defender);
+  BattleActionReport.addDefenderShipClass(builder, defenderShipClass);
+  BattleActionReport.addDestroyed(builder, destroyed);
+  return BattleActionReport.endBattleActionReport(builder);
+}
+
+unpack(): BattleActionReportT {
+  return new BattleActionReportT(
+    this.attacker(),
+    this.attackerShipClass(),
+    this.defender(),
+    this.defenderShipClass(),
+    this.destroyed()
+  );
+}
+
+
+unpackTo(_o: BattleActionReportT): void {
+  _o.attacker = this.attacker();
+  _o.attackerShipClass = this.attackerShipClass();
+  _o.defender = this.defender();
+  _o.defenderShipClass = this.defenderShipClass();
+  _o.destroyed = this.destroyed();
+}
+}
+
+export class BattleActionReportT implements flatbuffers.IGeneratedObject {
+constructor(
+  public attacker: bigint = BigInt('0'),
+  public attackerShipClass: bigint = BigInt('0'),
+  public defender: bigint = BigInt('0'),
+  public defenderShipClass: bigint = BigInt('0'),
+  public destroyed: boolean = false
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return BattleActionReport.createBattleActionReport(builder,
+    this.attacker,
+    this.attackerShipClass,
+    this.defender,
+    this.defenderShipClass,
+    this.destroyed
+  );
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/battle-report-group.ts

@@ -0,0 +1,201 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+import { TechEntry, TechEntryT } from '../battle/tech-entry.js';
+
+
+export class BattleReportGroup implements flatbuffers.IUnpackableObject<BattleReportGroupT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BattleReportGroup {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsBattleReportGroup(bb:flatbuffers.ByteBuffer, obj?:BattleReportGroup):BattleReportGroup {
+  return (obj || new BattleReportGroup()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsBattleReportGroup(bb:flatbuffers.ByteBuffer, obj?:BattleReportGroup):BattleReportGroup {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new BattleReportGroup()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+inBattle():boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
+}
+
+number():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('0');
+}
+
+numberLeft():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('0');
+}
+
+loadQuantity():number {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.readFloat32(this.bb_pos + offset) : 0.0;
+}
+
+tech(index: number, obj?:TechEntry):TechEntry|null {
+  const offset = this.bb!.__offset(this.bb_pos, 12);
+  return offset ? (obj || new TechEntry()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
+}
+
+techLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 12);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+race():string|null
+race(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+race(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 14);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+className():string|null
+className(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+className(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 16);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+loadType():string|null
+loadType(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+loadType(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 18);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+static startBattleReportGroup(builder:flatbuffers.Builder) {
+  builder.startObject(8);
+}
+
+static addInBattle(builder:flatbuffers.Builder, inBattle:boolean) {
+  builder.addFieldInt8(0, +inBattle, +false);
+}
+
+static addNumber(builder:flatbuffers.Builder, number:bigint) {
+  builder.addFieldInt64(1, number, BigInt('0'));
+}
+
+static addNumberLeft(builder:flatbuffers.Builder, numberLeft:bigint) {
+  builder.addFieldInt64(2, numberLeft, BigInt('0'));
+}
+
+static addLoadQuantity(builder:flatbuffers.Builder, loadQuantity:number) {
+  builder.addFieldFloat32(3, loadQuantity, 0.0);
+}
+
+static addTech(builder:flatbuffers.Builder, techOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(4, techOffset, 0);
+}
+
+static createTechVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
+  builder.startVector(4, data.length, 4);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startTechVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(4, numElems, 4);
+}
+
+static addRace(builder:flatbuffers.Builder, raceOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(5, raceOffset, 0);
+}
+
+static addClassName(builder:flatbuffers.Builder, classNameOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(6, classNameOffset, 0);
+}
+
+static addLoadType(builder:flatbuffers.Builder, loadTypeOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(7, loadTypeOffset, 0);
+}
+
+static endBattleReportGroup(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createBattleReportGroup(builder:flatbuffers.Builder, inBattle:boolean, number:bigint, numberLeft:bigint, loadQuantity:number, techOffset:flatbuffers.Offset, raceOffset:flatbuffers.Offset, classNameOffset:flatbuffers.Offset, loadTypeOffset:flatbuffers.Offset):flatbuffers.Offset {
+  BattleReportGroup.startBattleReportGroup(builder);
+  BattleReportGroup.addInBattle(builder, inBattle);
+  BattleReportGroup.addNumber(builder, number);
+  BattleReportGroup.addNumberLeft(builder, numberLeft);
+  BattleReportGroup.addLoadQuantity(builder, loadQuantity);
+  BattleReportGroup.addTech(builder, techOffset);
+  BattleReportGroup.addRace(builder, raceOffset);
+  BattleReportGroup.addClassName(builder, classNameOffset);
+  BattleReportGroup.addLoadType(builder, loadTypeOffset);
+  return BattleReportGroup.endBattleReportGroup(builder);
+}
+
+unpack(): BattleReportGroupT {
+  return new BattleReportGroupT(
+    this.inBattle(),
+    this.number(),
+    this.numberLeft(),
+    this.loadQuantity(),
+    this.bb!.createObjList<TechEntry, TechEntryT>(this.tech.bind(this), this.techLength()),
+    this.race(),
+    this.className(),
+    this.loadType()
+  );
+}
+
+
+unpackTo(_o: BattleReportGroupT): void {
+  _o.inBattle = this.inBattle();
+  _o.number = this.number();
+  _o.numberLeft = this.numberLeft();
+  _o.loadQuantity = this.loadQuantity();
+  _o.tech = this.bb!.createObjList<TechEntry, TechEntryT>(this.tech.bind(this), this.techLength());
+  _o.race = this.race();
+  _o.className = this.className();
+  _o.loadType = this.loadType();
+}
+}
+
+export class BattleReportGroupT implements flatbuffers.IGeneratedObject {
+constructor(
+  public inBattle: boolean = false,
+  public number: bigint = BigInt('0'),
+  public numberLeft: bigint = BigInt('0'),
+  public loadQuantity: number = 0.0,
+  public tech: (TechEntryT)[] = [],
+  public race: string|Uint8Array|null = null,
+  public className: string|Uint8Array|null = null,
+  public loadType: string|Uint8Array|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const tech = BattleReportGroup.createTechVector(builder, builder.createObjectOffsetList(this.tech));
+  const race = (this.race !== null ? builder.createString(this.race!) : 0);
+  const className = (this.className !== null ? builder.createString(this.className!) : 0);
+  const loadType = (this.loadType !== null ? builder.createString(this.loadType!) : 0);
+
+  return BattleReportGroup.createBattleReportGroup(builder,
+    this.inBattle,
+    this.number,
+    this.numberLeft,
+    this.loadQuantity,
+    tech,
+    race,
+    className,
+    loadType
+  );
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/battle-report.ts

@@ -0,0 +1,215 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+import { BattleActionReport, BattleActionReportT } from '../battle/battle-action-report.js';
+import { RaceEntry, RaceEntryT } from '../battle/race-entry.js';
+import { ShipEntry, ShipEntryT } from '../battle/ship-entry.js';
+import { UUID, UUIDT } from '../battle/uuid.js';
+
+
+export class BattleReport implements flatbuffers.IUnpackableObject<BattleReportT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BattleReport {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsBattleReport(bb:flatbuffers.ByteBuffer, obj?:BattleReport):BattleReport {
+  return (obj || new BattleReport()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsBattleReport(bb:flatbuffers.ByteBuffer, obj?:BattleReport):BattleReport {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new BattleReport()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+id(obj?:UUID):UUID|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? (obj || new UUID()).__init(this.bb_pos + offset, this.bb!) : null;
+}
+
+planet():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('0');
+}
+
+planetName():string|null
+planetName(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+planetName(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+races(index: number, obj?:RaceEntry):RaceEntry|null {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? (obj || new RaceEntry()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
+}
+
+racesLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+ships(index: number, obj?:ShipEntry):ShipEntry|null {
+  const offset = this.bb!.__offset(this.bb_pos, 12);
+  return offset ? (obj || new ShipEntry()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
+}
+
+shipsLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 12);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+protocol(index: number, obj?:BattleActionReport):BattleActionReport|null {
+  const offset = this.bb!.__offset(this.bb_pos, 14);
+  return offset ? (obj || new BattleActionReport()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
+}
+
+protocolLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 14);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+static startBattleReport(builder:flatbuffers.Builder) {
+  builder.startObject(6);
+}
+
+static addId(builder:flatbuffers.Builder, idOffset:flatbuffers.Offset) {
+  builder.addFieldStruct(0, idOffset, 0);
+}
+
+static addPlanet(builder:flatbuffers.Builder, planet:bigint) {
+  builder.addFieldInt64(1, planet, BigInt('0'));
+}
+
+static addPlanetName(builder:flatbuffers.Builder, planetNameOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(2, planetNameOffset, 0);
+}
+
+static addRaces(builder:flatbuffers.Builder, racesOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(3, racesOffset, 0);
+}
+
+static createRacesVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
+  builder.startVector(4, data.length, 4);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startRacesVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(4, numElems, 4);
+}
+
+static addShips(builder:flatbuffers.Builder, shipsOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(4, shipsOffset, 0);
+}
+
+static createShipsVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
+  builder.startVector(4, data.length, 4);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startShipsVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(4, numElems, 4);
+}
+
+static addProtocol(builder:flatbuffers.Builder, protocolOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(5, protocolOffset, 0);
+}
+
+static createProtocolVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
+  builder.startVector(4, data.length, 4);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startProtocolVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(4, numElems, 4);
+}
+
+static endBattleReport(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  builder.requiredField(offset, 4) // id
+  return offset;
+}
+
+static finishBattleReportBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset);
+}
+
+static finishSizePrefixedBattleReportBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset, undefined, true);
+}
+
+static createBattleReport(builder:flatbuffers.Builder, idOffset:flatbuffers.Offset, planet:bigint, planetNameOffset:flatbuffers.Offset, racesOffset:flatbuffers.Offset, shipsOffset:flatbuffers.Offset, protocolOffset:flatbuffers.Offset):flatbuffers.Offset {
+  BattleReport.startBattleReport(builder);
+  BattleReport.addId(builder, idOffset);
+  BattleReport.addPlanet(builder, planet);
+  BattleReport.addPlanetName(builder, planetNameOffset);
+  BattleReport.addRaces(builder, racesOffset);
+  BattleReport.addShips(builder, shipsOffset);
+  BattleReport.addProtocol(builder, protocolOffset);
+  return BattleReport.endBattleReport(builder);
+}
+
+unpack(): BattleReportT {
+  return new BattleReportT(
+    (this.id() !== null ? this.id()!.unpack() : null),
+    this.planet(),
+    this.planetName(),
+    this.bb!.createObjList<RaceEntry, RaceEntryT>(this.races.bind(this), this.racesLength()),
+    this.bb!.createObjList<ShipEntry, ShipEntryT>(this.ships.bind(this), this.shipsLength()),
+    this.bb!.createObjList<BattleActionReport, BattleActionReportT>(this.protocol.bind(this), this.protocolLength())
+  );
+}
+
+
+unpackTo(_o: BattleReportT): void {
+  _o.id = (this.id() !== null ? this.id()!.unpack() : null);
+  _o.planet = this.planet();
+  _o.planetName = this.planetName();
+  _o.races = this.bb!.createObjList<RaceEntry, RaceEntryT>(this.races.bind(this), this.racesLength());
+  _o.ships = this.bb!.createObjList<ShipEntry, ShipEntryT>(this.ships.bind(this), this.shipsLength());
+  _o.protocol = this.bb!.createObjList<BattleActionReport, BattleActionReportT>(this.protocol.bind(this), this.protocolLength());
+}
+}
+
+export class BattleReportT implements flatbuffers.IGeneratedObject {
+constructor(
+  public id: UUIDT|null = null,
+  public planet: bigint = BigInt('0'),
+  public planetName: string|Uint8Array|null = null,
+  public races: (RaceEntryT)[] = [],
+  public ships: (ShipEntryT)[] = [],
+  public protocol: (BattleActionReportT)[] = []
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const planetName = (this.planetName !== null ? builder.createString(this.planetName!) : 0);
+  const races = BattleReport.createRacesVector(builder, builder.createObjectOffsetList(this.races));
+  const ships = BattleReport.createShipsVector(builder, builder.createObjectOffsetList(this.ships));
+  const protocol = BattleReport.createProtocolVector(builder, builder.createObjectOffsetList(this.protocol));
+
+  return BattleReport.createBattleReport(builder,
+    (this.id !== null ? this.id!.pack(builder) : 0),
+    this.planet,
+    planetName,
+    races,
+    ships,
+    protocol
+  );
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/game-battle-request.ts

@@ -0,0 +1,99 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+import { UUID, UUIDT } from '../battle/uuid.js';
+
+
+export class GameBattleRequest implements flatbuffers.IUnpackableObject<GameBattleRequestT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):GameBattleRequest {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsGameBattleRequest(bb:flatbuffers.ByteBuffer, obj?:GameBattleRequest):GameBattleRequest {
+  return (obj || new GameBattleRequest()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsGameBattleRequest(bb:flatbuffers.ByteBuffer, obj?:GameBattleRequest):GameBattleRequest {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new GameBattleRequest()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+gameId(obj?:UUID):UUID|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? (obj || new UUID()).__init(this.bb_pos + offset, this.bb!) : null;
+}
+
+turn():number {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readUint32(this.bb_pos + offset) : 0;
+}
+
+battleId(obj?:UUID):UUID|null {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? (obj || new UUID()).__init(this.bb_pos + offset, this.bb!) : null;
+}
+
+static startGameBattleRequest(builder:flatbuffers.Builder) {
+  builder.startObject(3);
+}
+
+static addGameId(builder:flatbuffers.Builder, gameIdOffset:flatbuffers.Offset) {
+  builder.addFieldStruct(0, gameIdOffset, 0);
+}
+
+static addTurn(builder:flatbuffers.Builder, turn:number) {
+  builder.addFieldInt32(1, turn, 0);
+}
+
+static addBattleId(builder:flatbuffers.Builder, battleIdOffset:flatbuffers.Offset) {
+  builder.addFieldStruct(2, battleIdOffset, 0);
+}
+
+static endGameBattleRequest(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  builder.requiredField(offset, 4) // game_id
+  builder.requiredField(offset, 8) // battle_id
+  return offset;
+}
+
+
+unpack(): GameBattleRequestT {
+  return new GameBattleRequestT(
+    (this.gameId() !== null ? this.gameId()!.unpack() : null),
+    this.turn(),
+    (this.battleId() !== null ? this.battleId()!.unpack() : null)
+  );
+}
+
+
+unpackTo(_o: GameBattleRequestT): void {
+  _o.gameId = (this.gameId() !== null ? this.gameId()!.unpack() : null);
+  _o.turn = this.turn();
+  _o.battleId = (this.battleId() !== null ? this.battleId()!.unpack() : null);
+}
+}
+
+export class GameBattleRequestT implements flatbuffers.IGeneratedObject {
+constructor(
+  public gameId: UUIDT|null = null,
+  public turn: number = 0,
+  public battleId: UUIDT|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  GameBattleRequest.startGameBattleRequest(builder);
+  GameBattleRequest.addGameId(builder, (this.gameId !== null ? this.gameId!.pack(builder) : 0));
+  GameBattleRequest.addTurn(builder, this.turn);
+  GameBattleRequest.addBattleId(builder, (this.battleId !== null ? this.battleId!.pack(builder) : 0));
+
+  return GameBattleRequest.endGameBattleRequest(builder);
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/race-entry.ts

@@ -0,0 +1,85 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+import { UUID, UUIDT } from '../battle/uuid.js';
+
+
+export class RaceEntry implements flatbuffers.IUnpackableObject<RaceEntryT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):RaceEntry {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsRaceEntry(bb:flatbuffers.ByteBuffer, obj?:RaceEntry):RaceEntry {
+  return (obj || new RaceEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsRaceEntry(bb:flatbuffers.ByteBuffer, obj?:RaceEntry):RaceEntry {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new RaceEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+key():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+value(obj?:UUID):UUID|null {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? (obj || new UUID()).__init(this.bb_pos + offset, this.bb!) : null;
+}
+
+static startRaceEntry(builder:flatbuffers.Builder) {
+  builder.startObject(2);
+}
+
+static addKey(builder:flatbuffers.Builder, key:bigint) {
+  builder.addFieldInt64(0, key, BigInt('0'));
+}
+
+static addValue(builder:flatbuffers.Builder, valueOffset:flatbuffers.Offset) {
+  builder.addFieldStruct(1, valueOffset, 0);
+}
+
+static endRaceEntry(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  builder.requiredField(offset, 6) // value
+  return offset;
+}
+
+
+unpack(): RaceEntryT {
+  return new RaceEntryT(
+    this.key(),
+    (this.value() !== null ? this.value()!.unpack() : null)
+  );
+}
+
+
+unpackTo(_o: RaceEntryT): void {
+  _o.key = this.key();
+  _o.value = (this.value() !== null ? this.value()!.unpack() : null);
+}
+}
+
+export class RaceEntryT implements flatbuffers.IGeneratedObject {
+constructor(
+  public key: bigint = BigInt('0'),
+  public value: UUIDT|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  RaceEntry.startRaceEntry(builder);
+  RaceEntry.addKey(builder, this.key);
+  RaceEntry.addValue(builder, (this.value !== null ? this.value!.pack(builder) : 0));
+
+  return RaceEntry.endRaceEntry(builder);
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/ship-entry.ts

@@ -0,0 +1,86 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+import { BattleReportGroup, BattleReportGroupT } from '../battle/battle-report-group.js';
+
+
+export class ShipEntry implements flatbuffers.IUnpackableObject<ShipEntryT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):ShipEntry {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsShipEntry(bb:flatbuffers.ByteBuffer, obj?:ShipEntry):ShipEntry {
+  return (obj || new ShipEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsShipEntry(bb:flatbuffers.ByteBuffer, obj?:ShipEntry):ShipEntry {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new ShipEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+key():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt64(this.bb_pos + offset) : BigInt('0');
+}
+
+value(obj?:BattleReportGroup):BattleReportGroup|null {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? (obj || new BattleReportGroup()).__init(this.bb!.__indirect(this.bb_pos + offset), this.bb!) : null;
+}
+
+static startShipEntry(builder:flatbuffers.Builder) {
+  builder.startObject(2);
+}
+
+static addKey(builder:flatbuffers.Builder, key:bigint) {
+  builder.addFieldInt64(0, key, BigInt('0'));
+}
+
+static addValue(builder:flatbuffers.Builder, valueOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(1, valueOffset, 0);
+}
+
+static endShipEntry(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+
+unpack(): ShipEntryT {
+  return new ShipEntryT(
+    this.key(),
+    (this.value() !== null ? this.value()!.unpack() : null)
+  );
+}
+
+
+unpackTo(_o: ShipEntryT): void {
+  _o.key = this.key();
+  _o.value = (this.value() !== null ? this.value()!.unpack() : null);
+}
+}
+
+export class ShipEntryT implements flatbuffers.IGeneratedObject {
+constructor(
+  public key: bigint = BigInt('0'),
+  public value: BattleReportGroupT|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const value = (this.value !== null ? this.value!.pack(builder) : 0);
+
+  ShipEntry.startShipEntry(builder);
+  ShipEntry.addKey(builder, this.key);
+  ShipEntry.addValue(builder, value);
+
+  return ShipEntry.endShipEntry(builder);
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/tech-entry.ts

@@ -0,0 +1,92 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class TechEntry implements flatbuffers.IUnpackableObject<TechEntryT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):TechEntry {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsTechEntry(bb:flatbuffers.ByteBuffer, obj?:TechEntry):TechEntry {
+  return (obj || new TechEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsTechEntry(bb:flatbuffers.ByteBuffer, obj?:TechEntry):TechEntry {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new TechEntry()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+key():string|null
+key(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+key(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+value():number {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readFloat32(this.bb_pos + offset) : 0.0;
+}
+
+static startTechEntry(builder:flatbuffers.Builder) {
+  builder.startObject(2);
+}
+
+static addKey(builder:flatbuffers.Builder, keyOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(0, keyOffset, 0);
+}
+
+static addValue(builder:flatbuffers.Builder, value:number) {
+  builder.addFieldFloat32(1, value, 0.0);
+}
+
+static endTechEntry(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createTechEntry(builder:flatbuffers.Builder, keyOffset:flatbuffers.Offset, value:number):flatbuffers.Offset {
+  TechEntry.startTechEntry(builder);
+  TechEntry.addKey(builder, keyOffset);
+  TechEntry.addValue(builder, value);
+  return TechEntry.endTechEntry(builder);
+}
+
+unpack(): TechEntryT {
+  return new TechEntryT(
+    this.key(),
+    this.value()
+  );
+}
+
+
+unpackTo(_o: TechEntryT): void {
+  _o.key = this.key();
+  _o.value = this.value();
+}
+}
+
+export class TechEntryT implements flatbuffers.IGeneratedObject {
+constructor(
+  public key: string|Uint8Array|null = null,
+  public value: number = 0.0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const key = (this.key !== null ? builder.createString(this.key!) : 0);
+
+  return TechEntry.createTechEntry(builder,
+    key,
+    this.value
+  );
+}
+}

ui/frontend/src/proto/galaxy/fbs/battle/uuid.ts

@@ -0,0 +1,65 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class UUID implements flatbuffers.IUnpackableObject<UUIDT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):UUID {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+hi():bigint {
+  return this.bb!.readUint64(this.bb_pos);
+}
+
+lo():bigint {
+  return this.bb!.readUint64(this.bb_pos + 8);
+}
+
+static sizeOf():number {
+  return 16;
+}
+
+static createUUID(builder:flatbuffers.Builder, hi: bigint, lo: bigint):flatbuffers.Offset {
+  builder.prep(8, 16);
+  builder.writeInt64(BigInt(lo ?? 0));
+  builder.writeInt64(BigInt(hi ?? 0));
+  return builder.offset();
+}
+
+
+unpack(): UUIDT {
+  return new UUIDT(
+    this.hi(),
+    this.lo()
+  );
+}
+
+
+unpackTo(_o: UUIDT): void {
+  _o.hi = this.hi();
+  _o.lo = this.lo();
+}
+}
+
+export class UUIDT implements flatbuffers.IGeneratedObject {
+constructor(
+  public hi: bigint = BigInt('0'),
+  public lo: bigint = BigInt('0')
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return UUID.createUUID(builder,
+    this.hi,
+    this.lo
+  );
+}
+}