Add UnverifiedPackageT2/T3 pages, FuneralFinder pre-planning timeframe, PackageDetail variants

- UnverifiedPackageT3: package step for unverified providers (no image,
  estimated pricing disclaimer, "Make an enquiry" CTA, nearby verified
  providers section)
- UnverifiedPackageT2: same but with "Itemised Pricing Unavailable" notice
  replacing the line-item breakdown
- PackageDetail: new props — arrangeLabel, priceDisclaimer, itemizedUnavailable
- FuneralFinderV3: pre-planning follow-up question ("How soon might you
  need this?"), responsive sizing fixes, compulsory validation
- HomePage: fix finder container width (flex stretch + 500px cap)
- .gitignore: exclude Claude/Playwright artifacts, working docs, screenshots

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/pages/HomePage/HomePage.tsx

@@ -271,13 +271,14 @@ export const HomePage = React.forwardRef<HTMLDivElement, HomePageProps>(
                 sx={{
                   position: 'relative',
                   zIndex: 2,
+                  width: '100%',
                   px: 2,
                   pt: 2,
                   pb: 0,
                   mb: { xs: -14, md: -18 },
                 }}
               >
-                <Box sx={{ maxWidth: finderSlot ? 800 : 520, mx: 'auto' }}>
+                <Box sx={{ width: '100%', maxWidth: finderSlot ? 500 : 520, mx: 'auto' }}>
                   {finderSlot || (
                     <FuneralFinderV3
                       heading="Find your local providers"