feat: wallet UI — WalletConnect component + ranked fight flow in pages

Add WalletConnect.vue with NWC/LN Address connection states. Add "FIGHT
FOR SATS" button to JoinBoutPage with entry fee payment flow. Show ranked
pot and winner payout in FightPage. Add sats stats and wallet section to
BotProfilePage. Extend BotData interface with satsWon/satsWagered/hasWallet.

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

frontend/src/pages/BotProfilePage.vue

@@ -4,6 +4,7 @@ import { useRoute, useRouter, RouterLink } from 'vue-router'
 import { useNostr } from '../composables/useNostr'
 import SpritePreview from '../components/SpritePreview.vue'
 import HumanPreview from '../components/HumanPreview.vue'
+import WalletConnect from '../components/WalletConnect.vue'
 import type { SpriteCustomization } from '../game/sprites'
 
 const route = useRoute()
@@ -39,6 +40,9 @@ interface BotStats {
   totalFights: number
   rank: number
   totalBots: number
+  satsWon: number
+  satsWagered: number
+  hasWallet: boolean
   createdAt: string
   recentFights: {
     id: string
@@ -421,6 +425,23 @@ const tierClass = (t: number) => `tier-${t}`
               </div>
             </div>
 
+            <!-- Sats stats -->
+            <div v-if="stats.satsWon || stats.satsWagered" class="flex gap-2 mt-2">
+              <div class="flex-1 border border-neon-cyan/20 bg-neon-cyan/5 p-2.5 text-center">
+                <p class="font-display font-bold text-base text-neon-cyan">{{ stats.satsWon || 0 }}</p>
+                <p class="font-display text-[8px] text-text-muted tracking-wider mt-0.5">SATS WON</p>
+              </div>
+              <div class="flex-1 border border-neon-purple/20 bg-neon-purple/5 p-2.5 text-center">
+                <p class="font-display font-bold text-base text-neon-purple">{{ stats.satsWagered || 0 }}</p>
+                <p class="font-display text-[8px] text-text-muted tracking-wider mt-0.5">WAGERED</p>
+              </div>
+            </div>
+
+            <!-- Wallet connection (owner only) -->
+            <div v-if="isOwner" class="mt-3">
+              <WalletConnect />
+            </div>
+
             <!-- Fight actions -->
             <div class="flex gap-2 mt-4">
               <button