galaxy-game/ui/frontend/src/routes/games/[id]/+layout.svelte

<!--
Phase 10 in-game shell. Composes the header, a conditionally-visible
sidebar (Calculator / Inspector / Order tabs), the active-view slot
filled by the child route, and a mobile-only bottom-tab bar. The
layout owns:

- `sidebarOpen` — tablet-only drawer toggle. Desktop keeps the
  sidebar pinned via CSS; mobile hides it entirely.
- `mobileTool` — mobile-only tool overlay state. The tool only
  visually overrides the active-view slot when the URL is `/map`,
  so navigating to any other view through the More drawer or the
  header view-menu naturally drops the overlay even if `mobileTool`
  was set on a previous tap.
- `activeTab` — current sidebar tool (`calculator` / `inspector` /
  `order`). Held here, bound into the sidebar so a planet click on
  the map can flip it to `inspector` from the outside (Phase 13).
- Per-game stores: `GameStateStore`, `OrderDraftStore`, and the
  Phase 13 `SelectionStore`. All three are exposed to descendants
  via Svelte context; their lifetimes match the layout instance,
  which itself stays mounted across active-view switches inside
  `/games/:id/*`.

Phase 11 added the per-game `GameStateStore` instance owned by this
layout: it constructs the `GalaxyClient`, fetches the matching lobby
record to discover `current_turn`, then loads the report. The store
is shared with descendants via `setContext("gameState", ...)` so the
header turn counter, the map view, and the inspector tab all read
from the same snapshot.

Phase 13 adds the planet inspector. The layout watches the selection
store and, on the null → planet transition, flips `activeTab` to
`inspector` and `sidebarOpen` to `true` so the inspector becomes
visible regardless of breakpoint (desktop already has the sidebar
pinned; tablet needs the drawer to surface). On mobile the
`<PlanetSheet />` overlay reads the same selection and displays a
read-only sheet over the map; closing the sheet clears the
selection.

State preservation across active-view switches works for free
because SvelteKit keeps this layout instance mounted while children
swap; navigating between games unmounts and remounts the layout, so
the next game's snapshot — and the next game's selection — start
fresh.
-->
<script lang="ts">
	import { onDestroy, onMount, setContext } from "svelte";
	import { page } from "$app/state";
	import Header from "$lib/header/header.svelte";
	import Sidebar from "$lib/sidebar/sidebar.svelte";
	import BottomTabs from "$lib/sidebar/bottom-tabs.svelte";
	import Calculator from "$lib/sidebar/calculator-tab.svelte";
	import Order from "$lib/sidebar/order-tab.svelte";
	import PlanetSheet from "$lib/inspectors/planet-sheet.svelte";
	import type { MobileTool, SidebarTab } from "$lib/sidebar/types";
	import { GameStateStore, GAME_STATE_CONTEXT_KEY } from "$lib/game-state.svelte";
	import {
		SelectionStore,
		SELECTION_CONTEXT_KEY,
	} from "$lib/selection.svelte";
	import {
		createRenderedReportSource,
		RENDERED_REPORT_CONTEXT_KEY,
	} from "$lib/rendered-report.svelte";
	import {
		ORDER_DRAFT_CONTEXT_KEY,
		OrderDraftStore,
	} from "../../../sync/order-draft.svelte";
	import {
		GALAXY_CLIENT_CONTEXT_KEY,
		GalaxyClientHolder,
	} from "$lib/galaxy-client-context.svelte";
	import { session } from "$lib/session-store.svelte";
	import { loadStore } from "../../../platform/store/index";
	import { loadCore } from "../../../platform/core/index";
	import { createEdgeGatewayClient } from "../../../api/connect";
	import { GalaxyClient } from "../../../api/galaxy-client";
	import { GATEWAY_BASE_URL, GATEWAY_RESPONSE_PUBLIC_KEY } from "$lib/env";

	let { children } = $props();

	let sidebarOpen = $state(false);
	let mobileTool: MobileTool = $state("map");
	let activeTab: SidebarTab = $state("inspector");
	// Phase 12 ships the prop wiring; Phase 26 replaces this constant
	// with the real history-mode signal from `lib/history-mode.ts`.
	const historyMode = false;

	const gameId = $derived(page.params.id ?? "");
	const isOnMap = $derived(/\/games\/[^/]+\/map\/?$/.test(page.url.pathname));
	const effectiveTool: MobileTool = $derived.by(() =>
		isOnMap ? mobileTool : "map",
	);

	const gameState = new GameStateStore();
	setContext(GAME_STATE_CONTEXT_KEY, gameState);
	const orderDraft = new OrderDraftStore();
	setContext(ORDER_DRAFT_CONTEXT_KEY, orderDraft);
	const selection = new SelectionStore();
	setContext(SELECTION_CONTEXT_KEY, selection);
	const renderedReport = createRenderedReportSource(gameState, orderDraft);
	setContext(RENDERED_REPORT_CONTEXT_KEY, renderedReport);
	const galaxyClient = new GalaxyClientHolder();
	setContext(GALAXY_CLIENT_CONTEXT_KEY, galaxyClient);

	// selectedPlanet resolves the current selection against the live
	// report so both the desktop sidebar and the mobile sheet display
	// the same snapshot. A selection that points at a planet missing
	// from the current report (e.g. visibility lost between turns)
	// reads as `null` here, which collapses the inspector and the
	// sheet without surfacing a stale row. The rendered report layers
	// the local order draft on top so the player sees their pending
	// renames immediately.
	const selectedPlanet = $derived.by(() => {
		const sel = selection.selected;
		if (sel === null || sel.kind !== "planet") return null;
		const report = renderedReport.report;
		if (report === null) return null;
		return report.planets.find((p) => p.number === sel.id) ?? null;
	});
	const localShipClass = $derived(
		renderedReport.report?.localShipClass ?? [],
	);

	// Reveal the inspector whenever a new planet selection lands.
	// Reading `selection.selected` once outside the effect keeps the
	// effect dependent on the rune transition and not on the derived
	// `selectedPlanet`, which can flicker as the report refreshes.
	$effect(() => {
		const sel = selection.selected;
		if (sel === null) return;
		activeTab = "inspector";
		sidebarOpen = true;
	});

	function toggleSidebar(): void {
		sidebarOpen = !sidebarOpen;
	}

	async function sha256(payload: Uint8Array): Promise<Uint8Array> {
		const digest = await crypto.subtle.digest("SHA-256", payload as BufferSource);
		return new Uint8Array(digest);
	}

	onMount(() => {
		(async (): Promise<void> => {
			if (
				session.keypair === null ||
				session.deviceSessionId === null ||
				GATEWAY_RESPONSE_PUBLIC_KEY.length === 0
			) {
				return;
			}
			const keypair = session.keypair;
			const deviceSessionId = session.deviceSessionId;
			try {
				const [{ cache }, core] = await Promise.all([loadStore(), loadCore()]);
				const client = new GalaxyClient({
					core,
					edge: createEdgeGatewayClient(GATEWAY_BASE_URL),
					signer: (canonical) => keypair.sign(canonical),
					sha256,
					deviceSessionId,
					gatewayResponsePublicKey: GATEWAY_RESPONSE_PUBLIC_KEY,
				});
				await Promise.all([
					gameState.init({ client, cache, gameId }),
					orderDraft.init({ cache, gameId }),
				]);
				galaxyClient.set(client);
				orderDraft.bindClient(client);
				// The server is always polled at game boot — its
				// stored order may be fresher than the local cache
				// (e.g. user is on a new device), and an offline
				// edit must catch up at re-sync time. The hydration
				// is non-fatal: a network error keeps the local
				// cache and surfaces through `draft.syncStatus`.
				await orderDraft.hydrateFromServer({
					client,
					turn: gameState.currentTurn,
				});
			} catch (err) {
				gameState.failBootstrap(describeBootstrapError(err));
			}
		})();
	});

	onDestroy(() => {
		gameState.dispose();
		orderDraft.dispose();
		selection.dispose();
	});

	function describeBootstrapError(err: unknown): string {
		if (err instanceof Error) return err.message;
		return "request failed";
	}
</script>

<div class="game-shell" data-testid="game-shell">
	<Header
		{gameId}
		{sidebarOpen}
		onToggleSidebar={toggleSidebar}
	/>
	<div class="body">
		<main class="active-view-host" data-testid="active-view-host">
			{#if effectiveTool === "calc"}
				<Calculator />
			{:else if effectiveTool === "order"}
				<Order />
			{:else}
				{@render children()}
			{/if}
		</main>
		<Sidebar
			open={sidebarOpen}
			onClose={() => (sidebarOpen = false)}
			{historyMode}
			bind:activeTab
		/>
	</div>
	<BottomTabs
		{gameId}
		activeTool={effectiveTool}
		onSelectTool={(tool) => (mobileTool = tool)}
		hideOrder={historyMode}
	/>
	<PlanetSheet
		planet={selectedPlanet}
		{localShipClass}
		onMap={effectiveTool === "map"}
		onClose={() => selection.clear()}
	/>
</div>

<style>
	.game-shell {
		display: flex;
		flex-direction: column;
		min-height: 100vh;
		background: #0a0e1a;
		color: #e8eaf6;
	}
	.body {
		flex: 1;
		display: flex;
		min-height: 0;
	}
	.active-view-host {
		flex: 1;
		min-width: 0;
		overflow-y: auto;
	}
	@media (max-width: 767.98px) {
		.body {
			padding-bottom: 3.25rem;
		}
	}
</style>