Initial project setup: Rust/WASM solar system simulator with SvelteKit frontend

- Rust workspace with 4 crates: orbital-mechanics, mass-driver-core, mass-driver-wasm, mass-driver-backend
- Keplerian orbital mechanics engine with JPL elements for 14 bodies (Sun, 8 planets, Pluto, Ceres, Europa, Titan, Ganymede)
- Kepler equation solver and orbital position computation compiled to WASM
- SvelteKit frontend with Tailwind CSS, Canvas2D renderer showing animated solar system
- Orbit ellipses, planet dots with labels, Sun glow, grid, scale bar, pan/zoom controls
- Time controls (play/pause, 5 speed levels, date picker) driving live simulation
- 2D/3D view toggle (3D placeholder for Threlte integration)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/routes/+page.svelte

@@ -0,0 +1,64 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { simulation } from '$lib/stores/simulation.svelte';
+	import { initWasm } from '$lib/wasm/loader';
+	import { getBodyInfos } from '$lib/wasm/bridge';
+	import Viewport from './(simulator)/components/Viewport.svelte';
+	import TimeControls from './(simulator)/components/TimeControls.svelte';
+	import ViewToggle from './(simulator)/components/ViewToggle.svelte';
+
+	let wasmError = $state('');
+
+	onMount(async () => {
+		try {
+			await initWasm();
+			simulation.bodyInfos = getBodyInfos();
+			simulation.wasmReady = true;
+			// Start in Jan 2025 for a recognizable view
+			simulation.setDate(2025, 1, 1);
+			simulation.isPlaying = true;
+		} catch (e) {
+			wasmError = String(e);
+			console.error('Failed to load WASM module:', e);
+		}
+	});
+</script>
+
+<div class="h-screen w-screen flex flex-col bg-[var(--bg-primary)]">
+	<!-- Top bar -->
+	<header class="flex items-center justify-between px-4 py-2 bg-[var(--bg-secondary)] border-b border-white/5 shrink-0">
+		<div class="flex items-center gap-3">
+			<h1 class="text-sm font-bold tracking-wide text-[var(--text-primary)]">
+				MASS DRIVER
+			</h1>
+			<span class="text-xs text-[var(--text-secondary)]">Interplanetary Relay Network</span>
+		</div>
+		<ViewToggle />
+	</header>
+
+	<!-- Main content -->
+	<main class="flex-1 relative overflow-hidden">
+		{#if wasmError}
+			<div class="absolute inset-0 flex items-center justify-center">
+				<div class="bg-red-900/50 border border-red-500/30 rounded-lg p-6 max-w-md">
+					<h2 class="text-red-400 font-bold mb-2">Failed to load simulation engine</h2>
+					<p class="text-sm text-red-300/80">{wasmError}</p>
+				</div>
+			</div>
+		{:else if !simulation.wasmReady}
+			<div class="absolute inset-0 flex items-center justify-center">
+				<div class="text-center">
+					<div class="w-8 h-8 border-2 border-[var(--accent-blue)] border-t-transparent rounded-full animate-spin mx-auto mb-3"></div>
+					<p class="text-sm text-[var(--text-secondary)]">Initializing simulation engine...</p>
+				</div>
+			</div>
+		{:else}
+			<Viewport />
+		{/if}
+	</main>
+
+	<!-- Bottom bar: time controls -->
+	<footer class="px-4 py-2 bg-[var(--bg-secondary)] border-t border-white/5 shrink-0">
+		<TimeControls />
+	</footer>
+</div>