feat: F010 unified result feed

Replace monolithic Results.tsx with decomposed component architecture:
- 8 new components in src/components/results/ (ResultTypeBadge, ResultConfidenceSummary, FeedEmptyState, FeedSkeleton, ResultFeedHeader, ResultFilterBar, UnifiedResultCard, UnifiedResultFeed)
- Reuses existing useUnifiedResults hook and compareStore
- FUTURE_AVAILABILITY cards always display non-dismissable disclaimer
- Filter by result type + sort by score/area/rent

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/results/ResultFeedHeader.tsx

@@ -0,0 +1,21 @@
+import { Box, Typography } from '@mui/material'
+
+interface Props {
+  total: number
+  verifiedCount: number
+  externalCount: number
+  futureCount: number
+}
+
+export function ResultFeedHeader({ total, verifiedCount, externalCount, futureCount }: Props) {
+  return (
+    <Box sx={{ bgcolor: 'white', borderBottom: '1px solid #e2e8f0', px: 3, py: 2 }}>
+      <Typography variant="h5" sx={{ fontWeight: 700 }} color="text.primary">
+        {total} Treffer gefunden
+      </Typography>
+      <Typography variant="body2" color="text.secondary">
+        {verifiedCount} Verified · {externalCount} Extern · {futureCount} Signale
+      </Typography>
+    </Box>
+  )
+}