feat: add game starter component for physical robot game

frontend/src/App.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
   // Landing page for the Schafkopf Bot.
+  import Game from './lib/Game.svelte';
 </script>
 
 <main id="app">
@@ -69,6 +70,25 @@
     </ol>
   </section>
 
+  <section id="game" class="game container">
+    <h3>Physical robot game</h3>
+    <p class="muted">Boot the robot into an in-person game and let it play as one of the four seats.</p>
+    <div class="grid">
+      <div>
+        <!-- Game starter component -->
+        <Game />
+      </div>
+      <div class="card">
+        <h4>Setup checklist</h4>
+        <ul>
+          <li>Connect robot to the local network.</li>
+          <li>Place the robot at the chosen seat and align card feeder.</li>
+          <li>Calibrate cameras and touch sensors if needed.</li>
+        </ul>
+      </div>
+    </div>
+  </section>
+
   <section id="contact" class="contact container">
     <h3>Get early access</h3>
     <p>Interested in trying the bot or integrating it into a platform? Send a message and we'll reply with next steps.</p>

frontend/src/lib/Game.svelte

@@ -0,0 +1,96 @@
+<script lang="ts">
+  // Simple game starter UI that posts a start command to the backend.
+  import { writable } from 'svelte/store';
+
+  type Seat = 'North' | 'East' | 'South' | 'West';
+
+  let robotSeat: Seat = 'South';
+  let difficulty: 'easy' | 'medium' | 'hard' = 'medium';
+  let includeRobot = true;
+  let isStarting = false;
+  const logs = writable<string[]>([]);
+
+  function appendLog(line: string) {
+    logs.update((ls) => {
+      ls.push(line);
+      return ls.slice(-50);
+    });
+  }
+
+  async function startGame() {
+    isStarting = true;
+    appendLog(`Requesting new game (robotSeat=${robotSeat}, difficulty=${difficulty}, includeRobot=${includeRobot})`);
+
+    try {
+      const resp = await fetch('/api/game/start', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ robotSeat, difficulty, includeRobot }),
+      });
+
+      if (!resp.ok) {
+        const text = await resp.text();
+        throw new Error(text || resp.statusText);
+      }
+
+      const data = await resp.json();
+      appendLog('Game started: ' + JSON.stringify(data));
+    } catch (err) {
+      appendLog('Error starting game: ' + String(err));
+    } finally {
+      isStarting = false;
+    }
+  }
+</script>
+
+<section class="game-starter card">
+  <h4>Start a new physical game</h4>
+  <p class="muted">The robot will join as one of the four players and physically plays cards on the table.</p>
+
+  <div class="form-row">
+    <label>Robot seat</label>
+    <select bind:value={robotSeat} aria-label="Robot seat">
+      <option value="North">North</option>
+      <option value="East">East</option>
+      <option value="South">South</option>
+      <option value="West">West</option>
+    </select>
+  </div>
+
+  <div class="form-row">
+    <label>Difficulty</label>
+    <select bind:value={difficulty} aria-label="Difficulty">
+      <option value="easy">Easy</option>
+      <option value="medium">Medium</option>
+      <option value="hard">Hard</option>
+    </select>
+  </div>
+
+  <div class="form-row-inline">
+    <label><input type="checkbox" bind:checked={includeRobot} /> Include robot in this game</label>
+  </div>
+
+  <div class="actions">
+    <button class="btn primary" on:click={startGame} disabled={isStarting}> {isStarting ? 'Starting…' : 'Start game'} </button>
+  </div>
+
+  <div class="log">
+    <h5>Activity</h5>
+    <ul>
+      {#each $logs.slice().reverse() as line}
+        <li>{line}</li>
+      {/each}
+    </ul>
+  </div>
+</section>
+
+<style>
+  .game-starter { padding: 1rem; border-radius: 10px; }
+  .muted { color: var(--muted); margin-top: 0.25rem; }
+  .form-row { display:flex; flex-direction:column; gap:0.35rem; margin-top:0.8rem; }
+  .form-row-inline { margin-top:0.8rem; }
+  select { padding:0.5rem; border-radius:8px; background:transparent; color:inherit; border:1px solid rgba(255,255,255,0.04); }
+  .actions { margin-top:1rem; }
+  .log { margin-top:1rem; max-height:160px; overflow:auto; font-size:0.9rem; color:var(--muted); }
+  .log ul { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:0.25rem; }
+</style>