- Add CollapsibleSection component with animated expand/collapse
- Wrap all 6 resource sections (Nodes, VMs, PBS, Storage, Backups, Snapshots) with accordion UI
- Add section icons and resource counts in headers
- Add expand all / collapse all buttons for quick navigation
- Make help banner dismissible with localStorage persistence
- Add Ctrl/Cmd+F keyboard shortcut to focus search
- Add keyboard shortcut hint badge on search input
- Add icons to tab navigation for quick identification
- Improve mobile tab labels with shorter text on small screens
- Create reusable components: ThresholdBadge, ResourceCard, GlobalDefaultsRow
- Create useCollapsedSections hook with localStorage persistence
- Default less-used sections (Storage, Backups, Snapshots, PBS) to collapsed
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