feat: botfights v1 — full fighting game with Kaplay engine

- Vue 3 + Vite + Tailwind 4 frontend with synthwave aesthetic
- Hono backend on port 9100 with SQLite/Drizzle
- Procedural pixel-art sprite generator (48x48, 8 animation states)
- Kaplay fight scene with punch/kick/special/knockback/KO animations
- 12 mock bots across 6 tiers with Elo rating system
- 9 challenge types, 10 fight arenas with modifiers
- Fight replay with staggered battle log and ~1 min timing
- Sprite preview page at /sprites

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/App.vue

@@ -0,0 +1,14 @@
+<script setup lang="ts">
+import { RouterView } from 'vue-router'
+import NavBar from './components/NavBar.vue'
+</script>
+
+<template>
+  <div class="min-h-screen bg-surface synthwave-grid flex flex-col relative">
+    <div class="fixed inset-0 crt-overlay z-40" />
+    <NavBar />
+    <main class="flex-1 relative z-10">
+      <RouterView />
+    </main>
+  </div>
+</template>