feat: setup SvelteKit frontend with TypeScript

Implemented issue #9 - Frontend Project Setup with Svelte and TypeScript.

Changes:
- Created SvelteKit project with TypeScript
- Set up routing structure:
  - / (landing page)
  - /login
  - /register
  - /dashboard
  - /bot/[id]
  - /bot/[id]/backtest
  - /bot/[id]/simulate
  - /settings
- Created Svelte stores for state management:
  - userStore - Current user info
  - botsStore - List of user's bots
  - currentBotStore - Selected bot
  - chatStore - Chat messages
  - backtestStore - Backtest results
  - simulationStore - Simulation signals
  - authStore - Authentication state
- Created API client for backend communication
- Set up environment variables (.env.example)
- Created auth store with protected routes and login/register functionality

src/frontend/src/routes/+page.svelte

@@ -0,0 +1,135 @@
+<script lang="ts">
+	import { isAuthenticated } from '$lib/stores';
+</script>
+
+<svelte:head>
+	<title>Randebu - AI Trading Bot Platform</title>
+</svelte:head>
+
+{#if $isAuthenticated}
+	<script>
+		window.location.href = '/dashboard';
+	</script>
+{:else}
+	<main>
+		<div class="hero">
+			<h1>Randebu</h1>
+			<p class="tagline">Create trading bots through conversation with AI</p>
+			<div class="cta">
+				<a href="/register" class="btn btn-primary">Get Started</a>
+				<a href="/login" class="btn btn-secondary">Login</a>
+			</div>
+		</div>
+
+		<section class="features">
+			<h2>How It Works</h2>
+			<div class="feature-grid">
+				<div class="feature">
+					<h3>1. Describe Your Strategy</h3>
+					<p>Tell our AI what kind of trading you want to do in plain English</p>
+				</div>
+				<div class="feature">
+					<h3>2. Backtest & Validate</h3>
+					<p>Test your strategy against historical data before risking real funds</p>
+				</div>
+				<div class="feature">
+					<h3>3. Simulate & Monitor</h3>
+					<p>Run real-time simulations and watch for trading signals</p>
+				</div>
+			</div>
+		</section>
+	</main>
+{/if}
+
+<style>
+	:global(body) {
+		margin: 0;
+		font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+		background: #0f0f0f;
+		color: #fff;
+	}
+
+	main {
+		min-height: 100vh;
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		justify-content: center;
+		padding: 2rem;
+	}
+
+	.hero {
+		text-align: center;
+		max-width: 600px;
+	}
+
+	h1 {
+		font-size: 3.5rem;
+		margin: 0;
+		background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+		-webkit-background-clip: text;
+		-webkit-text-fill-color: transparent;
+	}
+
+	.tagline {
+		font-size: 1.25rem;
+		color: #aaa;
+		margin: 1rem 0 2rem;
+	}
+
+	.cta {
+		display: flex;
+		gap: 1rem;
+		justify-content: center;
+	}
+
+	.btn {
+		padding: 0.75rem 1.5rem;
+		border-radius: 8px;
+		text-decoration: none;
+		font-weight: 500;
+		transition: transform 0.2s, opacity 0.2s;
+	}
+
+	.btn:hover {
+		transform: translateY(-2px);
+	}
+
+	.btn-primary {
+		background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+		color: white;
+	}
+
+	.btn-secondary {
+		background: rgba(255, 255, 255, 0.1);
+		color: white;
+		border: 1px solid rgba(255, 255, 255, 0.2);
+	}
+
+	.features {
+		margin-top: 4rem;
+		text-align: center;
+	}
+
+	.features h2 {
+		font-size: 2rem;
+		margin-bottom: 2rem;
+	}
+
+	.feature-grid {
+		display: grid;
+		grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+		gap: 2rem;
+		max-width: 800px;
+	}
+
+	.feature h3 {
+		font-size: 1.25rem;
+		margin-bottom: 0.5rem;
+	}
+
+	.feature p {
+		color: #888;
+		font-size: 0.9rem;
+	}
+</style>