feat: render sparklines + wire trend-chart pill toggle (#6)

views/pages/index.ejs

@@ -19,6 +19,15 @@
         <div style="display: flex; justify-content: flex-end; gap: 12px; margin-bottom: 16px;">
             <a href="#" onclick="clearCache(); return false;" style="color: var(--text-muted); font-size: 12px; text-decoration: none; opacity: 0.4;" title="Clear cache"><i class="fas fa-cog"></i></a>
         </div>
+        <div class="table-toolbar">
+            <button id="trendchart-toggle" class="pill-toggle" type="button" aria-pressed="false">
+                <svg class="pill-icon" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true">
+                    <polyline points="1,9 4,5 7,7 11,2" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+                </svg>
+                <span class="pill-label">Trend chart</span>
+                <span class="pill-dot"></span>
+            </button>
+        </div>
         <div id="ratings-table" hx-get="/partials/ratings-table" hx-trigger="load"></div>
 `; %>