Update UI: Change Agent Arena to Join Arena and remove coverage metrics from asset cards

src/components/Header.vue

@@ -8,7 +8,7 @@
         <div class="menu-container">
             <span class="menu-item" @click="navigateTo('/live')">Live</span>
             <span class="menu-item" @click="navigateTo('/leadboard')">Leadboard</span>
-            <span class="menu-item" @click="navigateTo('/add-asset')">Agent Arena</span>
+            <span class="menu-item" @click="navigateTo('/add-asset')">Join Arena!</span>
         </div>
     </div>
 </template>

src/components/HeaderOpen.vue

@@ -24,7 +24,7 @@
           class="menu-item"
           :class="{ active: isActive('/add-asset') }"
           @click="navigateTo('/add-asset')"
-        >Agent Arena</span>
+        >Join Arena!</span>
       </nav>
     </div>
 

src/views/AddAssetView.vue

@@ -1,7 +1,7 @@
 <template>
   <div class="page-container">
     <div class="title-container">
-      <span class="main-title">Agent Arena</span>
+      <span class="main-title">Join Arena!</span>
       <div class="agents-info">
         <div class="agent-info-item">
           <span class="agent-name">InvestorAgent</span>

src/views/RequestView.vue

@@ -7,7 +7,7 @@
           <span class="ama-gradient">Assets in the Arena</span>
         </h2>
         <p class="section-sub">
-          Live from dataService • B&amp;H sparkline (ECharts LineChart) • 1M change • coverage
+          Live from dataService • B&amp;H sparkline (ECharts LineChart) • 1M change
         </p>
       </header>
 
@@ -54,11 +54,6 @@
           </div>
 
           <div class="asset-foot">
-            <div class="asset-bar" :style="{ '--pct': a.coveragePct + '%' }"></div>
-            <div class="asset-foot-row">
-              <span class="muted">Coverage</span>
-              <span class="mono">{{ Math.round(a.coveragePct) }}%</span>
-            </div>
             <div class="asset-foot-row">
               <span class="muted">EOD</span>
               <span class="mono">{{ a.eod || '—' }}</span>
@@ -107,7 +102,7 @@
         </article>
       </div>
 
-      <!-- Info-only integration guide -->
+      <!-- Info-only integration guide --> 
       <div class="card integration-guide">
         <h3>Agent Integration Guide</h3>
 
@@ -404,10 +399,6 @@ export default {
         const runs = rowsForAsset.length
         const agents = new Set(rowsForAsset.map(r => r.agent_name)).size
 
-        // coverage ~ unique dates present / span
-        const uniqueDates = new Set(seq.map(r => r.date)).size
-        const coveragePct = Math.max(0, Math.min(100, Math.round((uniqueDates / Math.max(1, days)) * 100)))
-
         cards.push({
           code,
           name: code,
@@ -418,7 +409,6 @@ export default {
           change1m,
           runs, agents, days,
           eod: lastDate,
-          coveragePct,
           desc: (code === 'BTC') ? 'Blue-chip crypto asset; 24/7 trading.'
                : (code === 'ETH') ? 'Smart-contract platform; high on-chain activity.'
                : 'Equity; regular trading days.'