feat(ui): refine download controls and package motion

Move the global package disclosure action into a responsive right-aligned toolbar group and disable it for empty queues. Replace the decorative package title with a compact neutral filter group, coordinate disclosure opacity with height transitions, and make contextual help follow combined pointer and keyboard focus state.

src/renderer/views/downloads/DownloadsView.tsx

@@ -93,15 +93,13 @@ const filters: Array<{ id: DownloadSidebarFilter; label: string }> = [
 
 export function DownloadsSidebar({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
   return (
-    <aside className="downloads-sidebar" data-visual-region="downloads-sidebar">
-      <div className="downloads-mode-title">Pakete</div>
-      <SlidingSelection activeKey={model.filter} aria-label="Downloadfilter" as="nav" axis="vertical">
+    <aside className="downloads-sidebar" data-visual-region="downloads-sidebar">
+      <SlidingSelection activeKey={model.filter} aria-label="Downloadfilter" as="nav" axis="vertical" className="downloads-filter-group">
         {filters.map((filter) => <button aria-current={model.filter === filter.id ? "page" : undefined} className={model.filter === filter.id ? "is-active" : ""} data-sliding-selection-active={model.filter === filter.id} data-sliding-selection-item="true" key={filter.id} onClick={() => actions.onFilterChange(filter.id)} type="button"><span>{filter.label}</span><b>{model.counts[filter.id]}</b></button>)}
       </SlidingSelection>
       <label className="downloads-provider-filter"><span>Service</span><select aria-label="Service filtern" disabled={model.providerOptions.length <= 1} onChange={(event) => actions.onProviderFilterChange(event.target.value)} value={model.providerFilter}><option value="all">Alle Services</option>{model.providerOptions.map((provider) => <option key={provider.id} value={provider.id}>{provider.label}</option>)}</select></label>
-      <label className="downloads-sidebar-search"><span>Downloads durchsuchen</span><input className="downloads-search-input" onChange={(event) => actions.onQueryChange(event.target.value)} placeholder="Paket, Datei oder Service" type="search" value={model.query} /></label>
+      <label className="downloads-sidebar-search"><span>Downloads durchsuchen</span><input className="downloads-search-input" onChange={(event) => actions.onQueryChange(event.target.value)} placeholder="Paket, Datei oder Service" type="search" value={model.query} /></label>
       <div className="downloads-sidebar-actions">
-        <button onClick={actions.onToggleAllPackages} type="button">Alle ein-/ausklappen</button>
         <button disabled={model.empty} onClick={actions.onClearAll} type="button">Liste leeren</button>
       </div>
       <label className="downloads-clipboard-toggle"><input checked={model.clipboardWatcher} onChange={actions.onToggleClipboardWatcher} type="checkbox" />Zwischenablage überwachen</label>
@@ -148,8 +146,11 @@ export function DownloadsToolbar({ actions, model }: { actions: DownloadsViewAct
       <span className="downloads-toolbar-divider" />
       <button disabled={!hasSelectedPackage} onClick={actions.onMoveSelectionUp} type="button">Nach oben</button>
       <button disabled={!hasSelectedPackage} onClick={actions.onMoveSelectionDown} type="button">Nach unten</button>
-      <button disabled={!onePackage} onClick={actions.onRenameSelection} type="button">Umbenennen</button>
-      <button disabled={!hasSelection} onClick={actions.onRemoveSelection} type="button">Entfernen</button>
+      <button disabled={!onePackage} onClick={actions.onRenameSelection} type="button">Umbenennen</button>
+      <button disabled={!hasSelection} onClick={actions.onRemoveSelection} type="button">Entfernen</button>
+      <span aria-label="Paketdarstellung" className="downloads-toolbar-tail" role="group">
+        <button className="downloads-toolbar-toggle-all" disabled={model.empty} onClick={actions.onToggleAllPackages} type="button">Alle ein-/ausklappen</button>
+      </span>
     </div>
   );
 }

src/renderer/views/downloads/download-disclosure-transition.ts

@@ -62,7 +62,7 @@ function itemGroup(
     packageId,
     items: items.map((row) => ({ ...row, height: DOWNLOAD_FILE_ROW_HEIGHT })),
     height,
-    disclosureOpacity: 1,
+    disclosureOpacity: phase === "entering" ? 0 : 1,
     disclosurePhase: phase
   };
 }
@@ -197,8 +197,8 @@ export function activateDownloadDisclosureTransition(rows: readonly DownloadDisc
   return rows.map((row) => {
     if (row.type !== "item-group") return row;
     return row.disclosurePhase === "entering"
-      ? { ...row, height: row.items.length * DOWNLOAD_FILE_ROW_HEIGHT }
-      : { ...row, height: 0 };
+      ? { ...row, height: row.items.length * DOWNLOAD_FILE_ROW_HEIGHT, disclosureOpacity: 1 }
+      : { ...row, height: 0, disclosureOpacity: 0 };
   });
 }
 

src/renderer/views/downloads/downloads.css

@@ -39,18 +39,11 @@
   padding: 14px 12px 6px;
 }
 
-.downloads-mode-title {
-  display: flex;
-  min-height: 36px;
-  align-items: center;
-  justify-content: center;
-  padding: 0 10px;
+.downloads-filter-group {
+  padding: 4px;
   border: 1px solid var(--ui-border);
   border-radius: 6px;
-  color: #0a0f1a;
-  background: #90cdf4;
-  text-align: center;
-  font-weight: 700;
+  background: var(--ui-input);
 }
 
 .downloads-sidebar nav button,
@@ -204,8 +197,10 @@
 .downloads-toolbar {
   display: flex;
   align-items: center;
+  flex-wrap: wrap;
   gap: 6px;
   min-height: 52px;
+  overflow-x: hidden;
   padding: 8px 10px;
   border-bottom: 1px solid var(--ui-border);
   background: var(--ui-surface);
@@ -237,6 +232,13 @@
   background: var(--ui-border);
 }
 
+.downloads-toolbar-tail {
+  display: flex;
+  flex: 1 0 auto;
+  justify-content: flex-end;
+  margin-left: auto;
+}
+
 .downloads-schedule-slot {
   display: grid;
   grid-template-columns: 0fr;
@@ -941,7 +943,6 @@
 }
 
 @media (max-width: 1120px) {
-  .downloads-toolbar,
   .downloads-footer {
     overflow-x: auto;
   }