Improve contextual help and download filter grouping

Open contextual help from wrapper hover and focus, close it only after pointer or focus exits the shared trigger-popover region, and make clicks open-only. Remove the standalone package title and present the existing download filters as the first compact neutral sidebar group without changing filter behavior. Extend the visual driver and manifest with hover, leave, focus, blur, internal-focus, and real headless Chromium regression coverage.

src/renderer/ui/ContextInfoButton.tsx

@@ -43,13 +43,23 @@ export function ContextInfoButton({
   }
 
   return (
-    <div className="ui-context-info">
+    <div
+      className="ui-context-info"
+      onBlur={(event) => {
+        if (!event.currentTarget.contains(event.relatedTarget as Node | null)) {
+          onOpenChange(false);
+        }
+      }}
+      onFocus={() => onOpenChange(true)}
+      onMouseEnter={() => onOpenChange(true)}
+      onMouseLeave={() => onOpenChange(false)}
+    >
       <button
         aria-controls={regionId}
         aria-expanded={open}
         aria-label="Informationen"
         className="ui-context-info-trigger"
-        onClick={() => onOpenChange(!open)}
+        onClick={() => onOpenChange(true)}
         title="Informationen"
         type="button"
       >

src/renderer/views/downloads/DownloadsView.tsx

@@ -96,9 +96,8 @@ 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>

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,