Add AMOLED theme, fullscreen, settings tab, and NTFY notifications

static/index.html

@@ -105,6 +105,9 @@
             <button class="nav-item" data-view="freedays" type="button">
               <span class="nav-key">7</span><span class="nav-label">free days</span>
             </button>
+            <button class="nav-item" data-view="settings" type="button">
+              <span class="nav-key">8</span><span class="nav-label">settings</span>
+            </button>
 
             <div class="side-sep"></div>
             <button class="nav-item nav-muted" data-action="refresh" type="button">