Implements shift-click multi-selection for hybrid filter components,
allowing users to select a range of items by holding shift and clicking.
This works alongside existing Cmd/Ctrl modifier for individual toggles.

- Separate shift key detection from Cmd/Ctrl modifiers
- Add range selection logic that selects all items between anchor and clicked item
- Extract performSingleToggle helper to reduce code duplication
- Track last selected item as anchor point for range selection
- Clear text selection on shift-click to prevent UI glitches
- Keep menu open during shift operations
- Add comprehensive unit tests for shift-click functionality
- Update all consumers to pass options array to hook

…ift-click in portal overlays

The onKeyDown/onKeyUp handlers on the CompactSelect wrapper div never
fired during dropdown interactions because the overlay renders in a
portal, so keyboard events don't bubble back up to the outer div.

Switch to window.addEventListener for keydown/keyup to reliably track
modifier key state regardless of which element is focused. Use useRef
for synchronous access in event handlers (avoiding stale closures), and
import the isModifierKeyPressed utility that was added but unused.