Addresses remaining medium and low severity audit findings:
- H2: Dark mode @media selector narrowed to :root:not([data-theme]) so
OS-preference and manual-override blocks are now mutually exclusive
- L2: Remove ~410 lines of dead Slides Builder CSS (no component exists)
- M2: VAT toggle uses flex spacer instead of margin-inline-start:auto,
preventing layout break when filter bar wraps at medium-small widths
- M3: Page content max-width aligned to 1400px (matches nav bar)
- M5: Period picker toggle now has aria-controls="period-picker-panel"
pointing to the InlinePicker root in both Dashboard and Comparison
- M6: Offline badge cache timestamp exposed via sr-only span for
screen reader accessibility (was title-only before)
- M7: chartOpts/barHorizOpts/barNoLegend wrapped in useMemo([baseOpts])
to prevent unnecessary Chart.js re-renders
- L4: Filter bar scrolls horizontally on mobile instead of wrapping
- L5: Metrics grid uses auto-fit/minmax to eliminate orphaned cards
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
