feat: voortgang copy/duplicate/move in headerbar

webui/html/base.css

@@ -71,6 +71,92 @@ body {
   min-width: 0;
 }
 
+.header-task-chip-container {
+  position: relative;
+  flex: 0 0 auto;
+}
+
+.header-task-chip {
+  border: 1px solid var(--color-border);
+  background: var(--color-surface);
+  color: var(--color-text-primary);
+  border-radius: 999px;
+  padding: 5px 10px;
+  font: inherit;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 1.2;
+  cursor: pointer;
+  white-space: nowrap;
+  box-shadow: 0 1px 2px rgba(8, 14, 22, 0.08);
+}
+
+.header-task-chip:hover,
+.header-task-chip[aria-expanded="true"] {
+  border-color: var(--color-accent);
+}
+
+.header-task-popover {
+  position: absolute;
+  top: calc(100% + 8px);
+  right: 0;
+  width: min(360px, calc(100vw - 24px));
+  padding: 12px;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  background: var(--color-surface-elevated);
+  box-shadow: var(--shadow-elevated);
+  z-index: 30;
+}
+
+.header-task-popover-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 10px;
+}
+
+.header-task-link {
+  border: 0;
+  background: none;
+  color: var(--color-accent);
+  padding: 0;
+  font: inherit;
+  font-size: 12px;
+  font-weight: 600;
+  cursor: pointer;
+}
+
+.header-task-popover-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  max-height: 260px;
+  overflow-y: auto;
+}
+
+.header-task-item {
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  background: var(--color-surface);
+  padding: 8px 9px;
+}
+
+.header-task-item-title {
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.header-task-item-path,
+.header-task-item-meta,
+.header-task-item-empty {
+  margin-top: 4px;
+  font-size: 12px;
+  color: var(--color-text-muted);
+  word-break: break-word;
+}
+
 h1, h2, h3 {
   margin: 0;
 }