ui/phase-12: order composer skeleton

OrderDraftStore persists per-game command drafts in Cache; the
sidebar Order tab renders the list with a per-row delete control.
The layout passes a `historyMode` prop through Sidebar / BottomTabs
as a constant `false`, so Phase 26 only flips the source.

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

ui/frontend/src/lib/i18n/locales/en.ts

@@ -118,7 +118,8 @@ const en = {
 	"game.sidebar.tab.order": "order",
 	"game.sidebar.empty.calculator": "coming soon",
 	"game.sidebar.empty.inspector": "select an object on the map",
-	"game.sidebar.empty.order": "coming soon",
+	"game.sidebar.empty.order": "order is empty",
+	"game.sidebar.order.command_delete": "delete",
 	"game.bottom_tabs.map": "map",
 	"game.bottom_tabs.calc": "calc",
 	"game.bottom_tabs.order": "order",

ui/frontend/src/lib/i18n/locales/ru.ts

@@ -119,7 +119,8 @@ const ru: Record<keyof typeof en, string> = {
 	"game.sidebar.tab.order": "приказ",
 	"game.sidebar.empty.calculator": "скоро будет",
 	"game.sidebar.empty.inspector": "выберите объект на карте",
-	"game.sidebar.empty.order": "скоро будет",
+	"game.sidebar.empty.order": "приказ пуст",
+	"game.sidebar.order.command_delete": "удалить",
 	"game.bottom_tabs.map": "карта",
 	"game.bottom_tabs.calc": "калк",
 	"game.bottom_tabs.order": "приказ",

ui/frontend/src/lib/sidebar/bottom-tabs.svelte

@@ -22,8 +22,14 @@ destinations beats the duplication.
 		gameId: string;
 		activeTool: MobileTool;
 		onSelectTool: (tool: MobileTool) => void;
+		hideOrder?: boolean;
 	};
-	let { gameId, activeTool, onSelectTool }: Props = $props();
+	let {
+		gameId,
+		activeTool,
+		onSelectTool,
+		hideOrder = false,
+	}: Props = $props();
 
 	let moreOpen = $state(false);
 	let rootEl: HTMLDivElement | null = $state(null);
@@ -99,17 +105,19 @@ destinations beats the duplication.
 			<span class="icon" aria-hidden="true">🧮</span>
 			<span class="label">{i18n.t("game.bottom_tabs.calc")}</span>
 		</button>
-		<button
-			type="button"
-			role="tab"
-			data-testid="bottom-tab-order"
-			aria-selected={activeTool === "order"}
-			class:active={activeTool === "order"}
-			onclick={() => selectTool("order")}
-		>
-			<span class="icon" aria-hidden="true">📝</span>
-			<span class="label">{i18n.t("game.bottom_tabs.order")}</span>
-		</button>
+		{#if !hideOrder}
+			<button
+				type="button"
+				role="tab"
+				data-testid="bottom-tab-order"
+				aria-selected={activeTool === "order"}
+				class:active={activeTool === "order"}
+				onclick={() => selectTool("order")}
+			>
+				<span class="icon" aria-hidden="true">📝</span>
+				<span class="label">{i18n.t("game.bottom_tabs.order")}</span>
+			</button>
+		{/if}
 		<button
 			type="button"
 			data-testid="bottom-tab-more"

ui/frontend/src/lib/sidebar/order-tab.svelte

@@ -1,14 +1,60 @@
 <!--
-Phase 10 stub for the Order composer sidebar tool. Phase 12 ships
-the composer skeleton; Phase 14 lands the first end-to-end command.
+Order composer tool. Resolves the per-game `OrderDraftStore` from
+context (set by `routes/games/[id]/+layout.svelte`) and renders the
+draft as a vertical, top-to-bottom command list. Empty state shows
+the i18n empty-state copy; non-empty state shows an ordered list of
+rows, each with a stable `data-testid` plus a per-row delete button.
+
+Phase 12 has no UI for adding commands — Phase 14 lands the first
+end-to-end command (`planetRename`) and the inspector affordance
+that pushes it into the draft. Tests exercise the skeleton through
+`__galaxyDebug.seedOrderDraft` (Playwright) and via direct store
+construction (Vitest).
 -->
 <script lang="ts">
+	import { getContext } from "svelte";
 	import { i18n } from "$lib/i18n/index.svelte";
+	import {
+		ORDER_DRAFT_CONTEXT_KEY,
+		OrderDraftStore,
+	} from "../../sync/order-draft.svelte";
+
+	const draft = getContext<OrderDraftStore | undefined>(
+		ORDER_DRAFT_CONTEXT_KEY,
+	);
+
+	function describe(cmd: { kind: string; label?: string }): string {
+		if (cmd.kind === "placeholder") return cmd.label ?? cmd.kind;
+		return cmd.kind;
+	}
 </script>
 
 <section class="tool" data-testid="sidebar-tool-order">
 	<h3>{i18n.t("game.sidebar.tab.order")}</h3>
-	<p>{i18n.t("game.sidebar.empty.order")}</p>
+	{#if draft === undefined || draft.commands.length === 0}
+		<p class="empty" data-testid="order-empty">
+			{i18n.t("game.sidebar.empty.order")}
+		</p>
+	{:else}
+		<ol class="commands" data-testid="order-list">
+			{#each draft.commands as cmd, index (cmd.id)}
+				<li class="command" data-testid="order-command-{index}">
+					<span class="index" aria-hidden="true">{index + 1}.</span>
+					<span class="label" data-testid="order-command-label-{index}">
+						{describe(cmd)}
+					</span>
+					<button
+						type="button"
+						class="delete"
+						data-testid="order-command-delete-{index}"
+						onclick={() => draft?.remove(cmd.id)}
+					>
+						{i18n.t("game.sidebar.order.command_delete")}
+					</button>
+				</li>
+			{/each}
+		</ol>
+	{/if}
 </section>
 
 <style>
@@ -20,8 +66,51 @@ the composer skeleton; Phase 14 lands the first end-to-end command.
 		margin: 0 0 0.5rem;
 		font-size: 1rem;
 	}
-	.tool p {
+	.empty {
 		margin: 0;
 		color: #888;
 	}
+	.commands {
+		list-style: none;
+		margin: 0;
+		padding: 0;
+		display: flex;
+		flex-direction: column;
+		gap: 0.25rem;
+	}
+	.command {
+		display: flex;
+		align-items: center;
+		gap: 0.5rem;
+		padding: 0.4rem 0.5rem;
+		background: #14182a;
+		border: 1px solid #20253a;
+		border-radius: 4px;
+	}
+	.index {
+		min-width: 1.5rem;
+		color: #aab;
+		font-variant-numeric: tabular-nums;
+	}
+	.label {
+		flex: 1;
+		min-width: 0;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+	}
+	.delete {
+		font: inherit;
+		font-size: 0.85rem;
+		padding: 0.2rem 0.55rem;
+		background: transparent;
+		color: #aab;
+		border: 1px solid #2a3150;
+		border-radius: 3px;
+		cursor: pointer;
+	}
+	.delete:hover {
+		color: #e8eaf6;
+		border-color: #6d8cff;
+	}
 </style>

ui/frontend/src/lib/sidebar/sidebar.svelte

@@ -1,14 +1,19 @@
 <!--
-Phase 10 sidebar with three tabs (Calculator, Inspector, Order). The
-parent layout decides whether the sidebar is rendered at all (mobile
-hides it, tablet collapses it behind the header toggle, desktop
-keeps it always visible). State preservation across active-view
-switches works for free because the layout never remounts when the
-user navigates within `/games/:id/*`.
+Sidebar with three tabs (Calculator, Inspector, Order). The parent
+layout decides whether the sidebar is rendered at all (mobile hides
+it, tablet collapses it behind the header toggle, desktop keeps it
+always visible). State preservation across active-view switches
+works for free because the layout never remounts when the user
+navigates within `/games/:id/*`.
 
 The optional `?sidebar=calc|calculator|inspector|order` URL param
 seeds the initial tab on first mount — used by the lobby card path
 when later phases want to land directly on a particular tool.
+
+The `historyMode` prop hides the Order tab when true: the tab-bar
+filters it out and any URL seed targeting `order` falls back to
+`inspector`. Phase 12 wires the prop through the layout as a
+constant `false`; Phase 26 flips it on for past-turn snapshots.
 -->
 <script lang="ts">
 	import { onMount } from "svelte";
@@ -23,8 +28,9 @@ when later phases want to land directly on a particular tool.
 	type Props = {
 		open: boolean;
 		onClose: () => void;
+		historyMode?: boolean;
 	};
-	let { open, onClose }: Props = $props();
+	let { open, onClose, historyMode = false }: Props = $props();
 
 	let activeTab: SidebarTab = $state("inspector");
 
@@ -36,11 +42,20 @@ when later phases want to land directly on a particular tool.
 		return null;
 	}
 
+	$effect(() => {
+		if (historyMode && activeTab === "order") {
+			activeTab = "inspector";
+		}
+	});
+
 	onMount(() => {
 		const seed = readUrlSeed();
-		if (seed !== null) {
-			activeTab = seed;
+		if (seed === null) return;
+		if (seed === "order" && historyMode) {
+			activeTab = "inspector";
+			return;
 		}
+		activeTab = seed;
 	});
 </script>
 
@@ -51,7 +66,11 @@ when later phases want to land directly on a particular tool.
 	data-open={open}
 >
 	<div class="head">
-		<TabBar {activeTab} onSelect={(tab) => (activeTab = tab)} />
+		<TabBar
+			{activeTab}
+			onSelect={(tab) => (activeTab = tab)}
+			hideOrder={historyMode}
+		/>
 		<button
 			type="button"
 			class="close"

ui/frontend/src/lib/sidebar/tab-bar.svelte

@@ -1,8 +1,14 @@
 <!--
-Three-button tab switcher for the Phase 10 sidebar. Each button is
-labelled and tagged so component tests can target it; the parent
-sidebar component owns the selected-tab state and re-renders the
-matching tool panel.
+Three-button tab switcher for the sidebar. Each button is labelled
+and tagged so component tests can target it; the parent sidebar
+component owns the selected-tab state and re-renders the matching
+tool panel.
+
+Phase 12 introduces the `hideOrder` prop: when true the Order entry
+is filtered out of the tab list. The current consumer is the
+`historyMode` flag forwarded from the in-game shell layout — the
+flag is constant `false` in Phase 12 and Phase 26's history mode
+flips it on.
 -->
 <script lang="ts">
 	import { i18n, type TranslationKey } from "$lib/i18n/index.svelte";
@@ -11,14 +17,18 @@ matching tool panel.
 	type Props = {
 		activeTab: SidebarTab;
 		onSelect: (tab: SidebarTab) => void;
+		hideOrder?: boolean;
 	};
-	let { activeTab, onSelect }: Props = $props();
+	let { activeTab, onSelect, hideOrder = false }: Props = $props();
 
-	const tabs: ReadonlyArray<{ id: SidebarTab; key: TranslationKey }> = [
+	const allTabs: ReadonlyArray<{ id: SidebarTab; key: TranslationKey }> = [
 		{ id: "calculator", key: "game.sidebar.tab.calculator" },
 		{ id: "inspector", key: "game.sidebar.tab.inspector" },
 		{ id: "order", key: "game.sidebar.tab.order" },
 	];
+	const tabs = $derived(
+		hideOrder ? allTabs.filter((t) => t.id !== "order") : allTabs,
+	);
 </script>
 
 <div class="tab-bar" role="tablist" data-testid="sidebar-tab-bar">

ui/frontend/src/routes/__debug/store/+page.svelte

@@ -6,6 +6,7 @@
 		setDeviceSessionId,
 	} from "../../../api/session";
 	import { loadStore } from "../../../platform/store/index";
+	import type { OrderCommand } from "../../../sync/order-types";
 
 	interface DebugSnapshot {
 		publicKey: number[];
@@ -22,6 +23,11 @@
 			message: number[],
 			signature: number[],
 		): Promise<boolean>;
+		seedOrderDraft(
+			gameId: string,
+			commands: OrderCommand[],
+		): Promise<void>;
+		clearOrderDraft(gameId: string): Promise<void>;
 	}
 
 	type DebugWindow = typeof globalThis & { __galaxyDebug?: DebugSurface };
@@ -96,6 +102,20 @@
 					throw new Error(`verifyWithStoredPublicKey: ${describe(err)}`);
 				}
 			},
+			async seedOrderDraft(gameId, commands) {
+				try {
+					await cache.put("order-drafts", `${gameId}/draft`, commands);
+				} catch (err) {
+					throw new Error(`seedOrderDraft: ${describe(err)}`);
+				}
+			},
+			async clearOrderDraft(gameId) {
+				try {
+					await cache.delete("order-drafts", `${gameId}/draft`);
+				} catch (err) {
+					throw new Error(`clearOrderDraft: ${describe(err)}`);
+				}
+			},
 		};
 		(window as DebugWindow).__galaxyDebug = surface;
 		ready = true;

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

@@ -34,6 +34,10 @@ the next game's snapshot is loaded fresh.
 	import Order from "$lib/sidebar/order-tab.svelte";
 	import type { MobileTool } from "$lib/sidebar/types";
 	import { GameStateStore, GAME_STATE_CONTEXT_KEY } from "$lib/game-state.svelte";
+	import {
+		ORDER_DRAFT_CONTEXT_KEY,
+		OrderDraftStore,
+	} from "../../../sync/order-draft.svelte";
 	import { session } from "$lib/session-store.svelte";
 	import { loadStore } from "../../../platform/store/index";
 	import { loadCore } from "../../../platform/core/index";
@@ -45,6 +49,9 @@ the next game's snapshot is loaded fresh.
 
 	let sidebarOpen = $state(false);
 	let mobileTool: MobileTool = $state("map");
+	// 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));
@@ -54,6 +61,8 @@ the next game's snapshot is loaded fresh.
 
 	const gameState = new GameStateStore();
 	setContext(GAME_STATE_CONTEXT_KEY, gameState);
+	const orderDraft = new OrderDraftStore();
+	setContext(ORDER_DRAFT_CONTEXT_KEY, orderDraft);
 
 	function toggleSidebar(): void {
 		sidebarOpen = !sidebarOpen;
@@ -85,7 +94,10 @@ the next game's snapshot is loaded fresh.
 					deviceSessionId,
 					gatewayResponsePublicKey: GATEWAY_RESPONSE_PUBLIC_KEY,
 				});
-				await gameState.init({ client, cache, gameId });
+				await Promise.all([
+					gameState.init({ client, cache, gameId }),
+					orderDraft.init({ cache, gameId }),
+				]);
 			} catch (err) {
 				gameState.failBootstrap(describeBootstrapError(err));
 			}
@@ -94,6 +106,7 @@ the next game's snapshot is loaded fresh.
 
 	onDestroy(() => {
 		gameState.dispose();
+		orderDraft.dispose();
 	});
 
 	function describeBootstrapError(err: unknown): string {
@@ -118,12 +131,17 @@ the next game's snapshot is loaded fresh.
 				{@render children()}
 			{/if}
 		</main>
-		<Sidebar open={sidebarOpen} onClose={() => (sidebarOpen = false)} />
+		<Sidebar
+			open={sidebarOpen}
+			onClose={() => (sidebarOpen = false)}
+			{historyMode}
+		/>
 	</div>
 	<BottomTabs
 		{gameId}
 		activeTool={effectiveTool}
 		onSelectTool={(tool) => (mobileTool = tool)}
+		hideOrder={historyMode}
 	/>
 </div>
 

ui/frontend/src/sync/order-draft.svelte.ts

@@ -0,0 +1,125 @@
+// Per-game runes store that owns the local order draft. Mirrors the
+// Phase 11 `GameStateStore` lifecycle: one instance per game, created
+// in `routes/games/[id]/+layout.svelte`, exposed to descendants via
+// Svelte context, disposed when the layout unmounts.
+//
+// Draft state is persisted into the platform `Cache` under the
+// `order-drafts` namespace with a per-game key, so a reload, a
+// browser restart, or a navigation through the lobby and back into
+// the same game restores the previously composed list. Phase 14
+// will add the submit pipeline that drains the draft to the server;
+// Phase 26 will hide the order tab in history mode through a flag
+// passed by the layout (the store itself remains alive across that
+// transition so the draft survives history-mode round-trips).
+//
+// The store deliberately carries no Svelte component imports so it
+// can be tested directly with a synthetic `Cache` without rendering
+// any UI.
+
+import type { Cache } from "../platform/store/index";
+import type { OrderCommand } from "./order-types";
+
+const NAMESPACE = "order-drafts";
+const draftKey = (gameId: string): string => `${gameId}/draft`;
+
+/**
+ * ORDER_DRAFT_CONTEXT_KEY is the Svelte context key the in-game shell
+ * layout uses to expose its `OrderDraftStore` instance to descendants.
+ * The order tab and any later command-builder UI resolve the store via
+ * `getContext(ORDER_DRAFT_CONTEXT_KEY)`.
+ */
+export const ORDER_DRAFT_CONTEXT_KEY = Symbol("order-draft");
+
+type Status = "idle" | "ready" | "error";
+
+export class OrderDraftStore {
+	commands: OrderCommand[] = $state([]);
+	status: Status = $state("idle");
+	error: string | null = $state(null);
+
+	private cache: Cache | null = null;
+	private gameId = "";
+	private destroyed = false;
+
+	/**
+	 * init loads the persisted draft for `opts.gameId` from `opts.cache`
+	 * into `commands` and flips `status` to `ready`. The call is
+	 * idempotent on the same store instance — the layout always
+	 * constructs a fresh store per game, so there is no need to support
+	 * mid-life game switching here.
+	 */
+	async init(opts: { cache: Cache; gameId: string }): Promise<void> {
+		this.cache = opts.cache;
+		this.gameId = opts.gameId;
+		try {
+			const stored = await opts.cache.get<OrderCommand[]>(
+				NAMESPACE,
+				draftKey(opts.gameId),
+			);
+			if (this.destroyed) return;
+			this.commands = Array.isArray(stored) ? [...stored] : [];
+			this.status = "ready";
+		} catch (err) {
+			if (this.destroyed) return;
+			this.status = "error";
+			this.error = err instanceof Error ? err.message : "load failed";
+		}
+	}
+
+	/**
+	 * add appends a command to the end of the draft and persists the
+	 * updated list. Mutations made before `init` resolves are ignored —
+	 * the layout always awaits `init` before exposing the store.
+	 */
+	async add(command: OrderCommand): Promise<void> {
+		if (this.status !== "ready") return;
+		this.commands = [...this.commands, command];
+		await this.persist();
+	}
+
+	/**
+	 * remove drops the command with the given id from the draft and
+	 * persists the result. A miss is a no-op.
+	 */
+	async remove(id: string): Promise<void> {
+		if (this.status !== "ready") return;
+		const next = this.commands.filter((cmd) => cmd.id !== id);
+		if (next.length === this.commands.length) return;
+		this.commands = next;
+		await this.persist();
+	}
+
+	/**
+	 * move relocates the command at `fromIndex` to `toIndex`, shifting
+	 * the intermediate commands. Out-of-range indices and identical
+	 * positions are no-ops; both indices are clamped against the
+	 * current `commands` length.
+	 */
+	async move(fromIndex: number, toIndex: number): Promise<void> {
+		if (this.status !== "ready") return;
+		const length = this.commands.length;
+		if (fromIndex < 0 || fromIndex >= length) return;
+		if (toIndex < 0 || toIndex >= length) return;
+		if (fromIndex === toIndex) return;
+		const next = [...this.commands];
+		const [picked] = next.splice(fromIndex, 1);
+		if (picked === undefined) return;
+		next.splice(toIndex, 0, picked);
+		this.commands = next;
+		await this.persist();
+	}
+
+	dispose(): void {
+		this.destroyed = true;
+		this.cache = null;
+	}
+
+	private async persist(): Promise<void> {
+		if (this.cache === null || this.destroyed) return;
+		// `commands` is `$state`, so individual entries are proxies.
+		// IndexedDB's structured clone refuses to clone proxies, so the
+		// snapshot must be taken before the put.
+		const snapshot = $state.snapshot(this.commands) as OrderCommand[];
+		await this.cache.put(NAMESPACE, draftKey(this.gameId), snapshot);
+	}
+}

ui/frontend/src/sync/order-types.ts

@@ -0,0 +1,59 @@
+// Typed shape of a single command entry inside the local order
+// draft. Phase 12 intentionally ships exactly one variant
+// (`placeholder`) — Phase 14 lands the first real command
+// (`planetRename`) together with the inspector UI that constructs
+// it and the submit pipeline that drains the draft to the server.
+//
+// `OrderCommand` is a discriminated union on the `kind` field so
+// later variants can extend the union without changing the array
+// shape persisted in `Cache`. The whole draft round-trips through
+// IndexedDB structured clone, so every variant must use only
+// JSON-friendly value types (`string`, `number`, `boolean`,
+// nested plain objects, and `Uint8Array`).
+
+/**
+ * PlaceholderCommand is the single variant shipped with the Phase 12
+ * skeleton. It carries a stable `id` (used by remove and as a
+ * `data-testid` suffix) and a human-readable `label` rendered in the
+ * order tab's vertical list. The variant is deliberately content-free
+ * so test fixtures and the empty composer skeleton do not pre-bias
+ * Phase 14's first real command shape.
+ */
+export interface PlaceholderCommand {
+	readonly kind: "placeholder";
+	readonly id: string;
+	readonly label: string;
+}
+
+/**
+ * OrderCommand is the discriminated union of every command shape the
+ * local order draft can hold. The `kind` field is the discriminator;
+ * narrowing on it enables exhaustive `switch` statements at every
+ * call site. Phase 14 will widen the union with `planetRename`.
+ */
+export type OrderCommand = PlaceholderCommand;
+
+/**
+ * CommandStatus is the lifecycle of a single command from the moment
+ * it lands in the draft to the moment the server resolves it. The
+ * skeleton stores only the type description; Phase 14 adds the
+ * `valid` / `invalid` transitions driven by local validation, and
+ * Phase 25 introduces `submitting` / `applied` / `rejected` driven
+ * by the submit pipeline.
+ *
+ * The state machine is:
+ *
+ *	draft → valid     → submitting → applied
+ *	      ↘ invalid                ↘ rejected
+ *
+ * A command is `draft` until local validation has run, then `valid`
+ * or `invalid`. On submit the entry transitions to `submitting`,
+ * then to `applied` or `rejected` once the gateway responds.
+ */
+export type CommandStatus =
+	| "draft"
+	| "valid"
+	| "invalid"
+	| "submitting"
+	| "applied"
+	| "rejected";