release: publish v2.0.20 selection and sidebar refinements

Complete zero-width sidebar collapse with synchronized bidirectional motion, add package-row selection and guarded double-click disclosure, render continuous selection edges across nested package boundaries, expand regression coverage, and update the public English changelog and package metadata for v2.0.20.

src/renderer/views/downloads/DownloadsTable.tsx

@@ -18,6 +18,7 @@ export type DownloadSortColumn = "name" | "size" | "hoster" | "progress";
 
 const DOWNLOAD_SELECTION_COLUMN_WIDTH = "36px";
 const DOWNLOAD_ACTION_COLUMN_WIDTH = "60px";
+const PACKAGE_ROW_DISCLOSURE_EXCLUSION_SELECTOR = "button, input, select, textarea, a, [contenteditable='true'], .downloads-copyable, .downloads-meter";
 const useRendererLayoutEffect = typeof window === "undefined" ? useEffect : useLayoutEffect;
 
 type HosterLabel = ReturnType<typeof formatHosterLabel>;
@@ -40,6 +41,11 @@ function downloadGridTemplate(gridTemplate: string): string {
   return `${DOWNLOAD_SELECTION_COLUMN_WIDTH} ${gridTemplate} ${DOWNLOAD_ACTION_COLUMN_WIDTH}`;
 }
 
+function isPackageRowDisclosureExcluded(target: EventTarget | null): boolean {
+  const closest = (target as { closest?: (selector: string) => Element | null } | null)?.closest;
+  return typeof closest === "function" && closest.call(target, PACKAGE_ROW_DISCLOSURE_EXCLUSION_SELECTOR) !== null;
+}
+
 export const downloadColumnDefinitions: Record<string, { label: string; width: string; sortable?: DownloadSortColumn }> = {
   name: { label: "Name", width: "minmax(290px, 2.3fr)", sortable: "name" },
   size: { label: "Geladen / Größe", width: "minmax(140px, 1.1fr)", sortable: "size" },
@@ -489,9 +495,14 @@ export function PackageCardContent({ row, selectedIds, editing, editingName, pac
         role="row"
         style={{ gridTemplateColumns: downloadGridTemplate(gridTemplate) }}
         onClick={(event) => {
-          if (event.ctrlKey || event.metaKey || event.shiftKey) {
-            actions.onToggleSelection(entry.id, event.ctrlKey || event.metaKey, event.shiftKey);
-          }
+          if (event.detail > 1) return;
+          if (!event.ctrlKey && !event.metaKey && !event.shiftKey && selectedIds.size === 1 && selectedIds.has(entry.id)) return;
+          actions.onToggleSelection(entry.id, event.ctrlKey || event.metaKey, event.shiftKey);
+        }}
+        onDoubleClick={(event) => {
+          if (event.ctrlKey || event.metaKey || event.shiftKey || isPackageRowDisclosureExcluded(event.target)) return;
+          event.preventDefault();
+          actions.onTogglePackageCollapse(entry.id);
         }}
         onMouseDown={(event) => actions.onSelectionMouseDown(entry.id, event)}
         onMouseEnter={() => actions.onSelectionMouseEnter(entry.id)}

src/renderer/views/downloads/downloads.css

@@ -300,6 +300,11 @@
   opacity: 0.58;
 }
 
+.downloads-package-card.is-selected,
+.downloads-package-card:has(.downloads-package-items-inner > .downloads-item-row:last-child.is-selected) {
+  position: relative;
+}
+
 .downloads-package-items {
   height: auto;
   overflow: hidden;
@@ -332,6 +337,7 @@
   color: var(--ui-text);
   background: transparent;
   border-color: var(--ui-border);
+  border-left: 3px solid transparent;
   contain: layout paint style;
   content-visibility: auto;
   contain-intrinsic-size: 40px;
@@ -346,8 +352,41 @@
 
 .downloads-item-row.is-selected,
 .downloads-package-card.is-selected > .downloads-package-row {
+  position: relative;
   background: color-mix(in srgb, var(--ui-success) 14%, var(--ui-canvas));
-  box-shadow: inset 3px 0 0 var(--ui-success);
+  border-left-color: var(--ui-success);
+}
+
+.downloads-item-row.is-selected::before {
+  content: "";
+  position: absolute;
+  z-index: 1;
+  inset: -1px auto -1px -3px;
+  width: 3px;
+  background: var(--ui-success);
+  pointer-events: none;
+}
+
+.downloads-package-card.is-selected::before {
+  content: "";
+  position: absolute;
+  z-index: 3;
+  inset: 0 auto auto 0;
+  width: 3px;
+  height: 41px;
+  background: var(--ui-success);
+  pointer-events: none;
+}
+
+.downloads-package-card:has(.downloads-package-items-inner > .downloads-item-row:last-child.is-selected)::after {
+  content: "";
+  position: absolute;
+  z-index: 3;
+  inset: auto auto -1px 0;
+  width: 3px;
+  height: 1px;
+  background: var(--ui-success);
+  pointer-events: none;
 }
 
 .downloads-package-row:hover,