Add WATERFALL title label to function bar

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

static/css/components/function-strip.css

@@ -19,6 +19,17 @@
     min-width: max-content;
 }
 
+/* Strip title badge */
+.function-strip .strip-title {
+    font-size: 9px;
+    font-weight: 700;
+    letter-spacing: 1.5px;
+    text-transform: uppercase;
+    color: var(--text-muted);
+    white-space: nowrap;
+    padding: 4px 0;
+}
+
 /* Stats */
 .function-strip .strip-stat {
     display: flex;

templates/index.html

@@ -1030,6 +1030,8 @@
                     <!-- WATERFALL FUNCTION BAR -->
                     <div class="function-strip listening-strip" style="grid-column: span 4;">
                         <div class="function-strip-inner">
+                            <span class="strip-title">WATERFALL</span>
+                            <div class="strip-divider"></div>
                             <!-- Span display -->
                             <div class="strip-stat">
                                 <span class="strip-value" id="waterfallZoomSpan">20.0 MHz</span>