feat(wave): implement Phase 1 Smart Wave recommendations and buffer rotation

app/static/style.css

@@ -610,3 +610,124 @@ input[type="text"]:focus {
     justify-content: flex-end;
   }
 }
+
+/* Smart Wave Styles */
+.badge-wave {
+  background-color: rgba(6, 182, 212, 0.2);
+  color: #22d3ee;
+  border: 1px solid rgba(6, 182, 212, 0.4);
+  font-size: 0.72rem;
+  font-weight: 700;
+  padding: 0.15rem 0.5rem;
+  border-radius: 4px;
+}
+
+.wave-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  gap: 1rem;
+  flex-wrap: wrap;
+  margin-bottom: 1rem;
+}
+
+.wave-subtitle {
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+  margin-top: 0.25rem;
+}
+
+.wave-controls {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-shrink: 0;
+}
+
+.wave-stats-row {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
+  gap: 0.75rem;
+  background-color: #0f172a;
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  padding: 0.75rem 1rem;
+}
+
+.wave-stat {
+  display: flex;
+  flex-direction: column;
+  gap: 0.2rem;
+}
+
+.wave-stat-label {
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+}
+
+.wave-stat strong {
+  font-size: 0.95rem;
+  color: #f8fafc;
+}
+
+.wave-stat strong a {
+  color: #22d3ee;
+  text-decoration: none;
+}
+.wave-stat strong a:hover {
+  text-decoration: underline;
+}
+
+.wave-anchors-tags {
+  display: flex;
+  gap: 0.4rem;
+  flex-wrap: wrap;
+  margin-top: 0.3rem;
+}
+
+.tag-anchor {
+  background-color: #1e293b;
+  border: 1px solid #334155;
+  color: #94a3b8;
+  padding: 0.15rem 0.5rem;
+  border-radius: 4px;
+  font-size: 0.78rem;
+}
+
+.wave-tracks-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 0.6rem;
+}
+
+.wave-tracks-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.4rem;
+  max-height: 420px;
+  overflow-y: auto;
+}
+
+.wave-track-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  background-color: #0f172a;
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  padding: 0.5rem 0.8rem;
+  gap: 0.75rem;
+}
+
+.spinner-sm {
+  display: inline-block;
+  width: 12px;
+  height: 12px;
+  border: 2px solid var(--accent-color);
+  border-top-color: transparent;
+  border-radius: 50%;
+  animation: spin 0.8s linear infinite;
+  vertical-align: middle;
+  margin-right: 0.3rem;
+}