Initial open-source release

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

src/ui/Tree.module.css

@@ -0,0 +1,128 @@
+.wrap {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+  height: 100%;
+}
+/* Tree.border 4,12,4,12 minus the island padding; rows are inset so the rounded selection floats. */
+.tree {
+  flex: 1;
+  min-height: 0;
+  overflow: auto;
+  outline: none;
+  padding: 0 var(--tree-inset, 6px);
+}
+.tree::-webkit-scrollbar {
+  width: 10px;
+  height: 10px;
+}
+.tree::-webkit-scrollbar-thumb {
+  background-color: var(--scrollbar-thumb);
+  border: 2px solid transparent;
+  border-radius: 5px;
+  background-clip: content-box;
+}
+.tree::-webkit-scrollbar-thumb:hover {
+  background-color: var(--scrollbar-thumb-hover);
+}
+.tree::-webkit-scrollbar-track,
+.tree::-webkit-scrollbar-corner {
+  background: transparent;
+}
+.emptyWrap {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--fg-faint);
+}
+.sizer {
+  position: relative;
+  width: 100%;
+}
+.row {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding-right: 8px;
+  border-radius: var(--radius-selection, 5px);
+  color: var(--fg-strong);
+  white-space: nowrap;
+}
+.row:hover {
+  background: var(--bg-tree-hover, color-mix(in srgb, var(--fg-strong) 4%, transparent));
+}
+/* Tree.selectionInactiveBackground when unfocused, selectionBackground when focused. */
+.selected,
+.selected:hover {
+  background: var(--bg-tree-selected-inactive);
+}
+.tree:focus .selected,
+.tree:focus-within .selected {
+  background: var(--bg-tree-selected);
+}
+.tree:focus-visible .lead:not(.selected) {
+  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--focus-ring) 50%, transparent);
+}
+.loading {
+  color: var(--fg-faint);
+}
+.chevron {
+  flex: none;
+  width: 16px;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--fg-muted);
+}
+.icon {
+  flex: none;
+  margin-right: 2px;
+  color: var(--fg-muted);
+}
+.label {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.detail {
+  min-width: 0;
+  margin-left: 4px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  color: var(--fg-muted);
+}
+/* SpeedSearch popup above the tree. */
+.speedSearch {
+  position: absolute;
+  top: 0;
+  left: 8px;
+  z-index: var(--z-panel);
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  height: 26px;
+  max-width: calc(100% - 16px);
+  padding: 0 10px 0 8px;
+  border-radius: var(--radius-control, 4px);
+  background: var(--bg-popup);
+  border: 1px solid var(--border-popup);
+  box-shadow: var(--shadow-popup);
+  color: var(--fg-muted);
+  font-size: var(--fs-ui);
+  pointer-events: none;
+}
+.speedQuery {
+  color: var(--fg-strong);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: pre;
+}
+.noMatch .speedQuery {
+  color: var(--danger);
+}