Add conversations modal

internal/service/static/css/main.css

@@ -945,6 +945,140 @@ body {
   color: var(--color-red);
 }
 
+/* ==================== */
+/* Conversations Modal  */
+/* ==================== */
+
+.conversations-overlay {
+  display: none;
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+}
+
+.conversations-overlay.open {
+  display: block;
+}
+
+/* The picker fills the screen. The search field stays at the top
+   and the list scrolls below it. */
+.conversations-panel {
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  height: 100dvh;
+  background: var(--color-surface);
+}
+
+.conversations-panel__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: var(--s-1) var(--s1);
+  border-bottom: 1px solid var(--color-border-light);
+  flex-shrink: 0;
+}
+
+.conversations-panel__title {
+  font-size: var(--s1);
+  font-weight: 600;
+  color: var(--color-text);
+  margin: 0;
+}
+
+#conversations-close {
+  border: none;
+  color: var(--color-text);
+}
+
+@media (hover: hover) {
+  #conversations-close:hover {
+    border-color: transparent;
+    color: var(--color-text);
+  }
+}
+
+.conversations-panel__search {
+  padding: var(--s-1) var(--s1);
+  border-bottom: 1px solid var(--color-border-light);
+  flex-shrink: 0;
+}
+
+.conversations-search {
+  display: block;
+  width: 100%;
+  height: var(--s2);
+  padding: 0 var(--s-1);
+  font-family: inherit;
+  font-size: var(--s-1);
+  line-height: var(--s2);
+  color: var(--color-text);
+  background: var(--color-bg);
+  border: 1px solid var(--color-border-light);
+  border-radius: var(--radius);
+}
+
+.conversations-search:focus-visible {
+  outline: 2px solid var(--color-primary);
+  outline-offset: 2px;
+}
+
+.conversations-panel__list {
+  flex: 1;
+  overflow-y: auto;
+  padding: var(--s-1) var(--s1);
+}
+
+.conversations__item {
+  display: flex;
+  flex-direction: column;
+  gap: var(--s-2);
+  width: 100%;
+  padding: var(--s-1);
+  font-family: inherit;
+  text-align: left;
+  background: transparent;
+  border: none;
+  border-radius: var(--radius);
+  cursor: pointer;
+}
+
+@media (hover: hover) {
+  .conversations__item:hover {
+    background: var(--color-gray1);
+  }
+}
+
+.conversations__item:focus-visible {
+  outline: 2px solid var(--color-primary);
+  outline-offset: -2px;
+}
+
+.conversations__item--current {
+  background: var(--color-gray1);
+}
+
+.conversations__item-title {
+  font-size: var(--s0);
+  color: var(--color-text);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.conversations__item-updated {
+  font-size: var(--s-1);
+  font-family: var(--font-mono);
+  color: var(--color-text-muted);
+}
+
+.conversations__empty {
+  padding: var(--s2);
+  font-size: var(--s0);
+  color: var(--color-text-muted);
+  text-align: center;
+}
+
 /* ==================== */
 .modal-overlay {
   position: fixed;