feat: F029 intelligence card system — premium AI-native CRE cards

Gold/Silver/Bronze FIFA-style score badges overlaid on location imagery.
List/grid view toggle on Results and Properties pages (persisted in
localStorage). IntelligenceMatchCard for match results grid view;
PropertyIntelligenceCard for property grid view with warm brown theme.
LocationPreview component with Google Maps link. 10 mock properties
enriched with Unsplash building images.

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

src/components/shared/ViewToggle.tsx

@@ -0,0 +1,46 @@
+import { Box, IconButton, Tooltip } from '@mui/material'
+import { LayoutGrid, LayoutList } from 'lucide-react'
+
+interface Props {
+  view: 'list' | 'grid'
+  onChange: (v: 'list' | 'grid') => void
+}
+
+export function ViewToggle({ view, onChange }: Props) {
+  return (
+    <Box sx={{ display: 'flex', gap: 0.25, border: '1px solid #e2e8f0', borderRadius: 1, overflow: 'hidden' }}>
+      <Tooltip title="Listenansicht">
+        <IconButton
+          size="small"
+          onClick={() => onChange('list')}
+          sx={{
+            borderRadius: 0,
+            width: 32,
+            height: 32,
+            bgcolor: view === 'list' ? '#1e3a5f' : 'transparent',
+            color: view === 'list' ? 'white' : '#64748b',
+            '&:hover': { bgcolor: view === 'list' ? '#162d4a' : '#f1f5f9' },
+          }}
+        >
+          <LayoutList size={15} />
+        </IconButton>
+      </Tooltip>
+      <Tooltip title="Kartenansicht">
+        <IconButton
+          size="small"
+          onClick={() => onChange('grid')}
+          sx={{
+            borderRadius: 0,
+            width: 32,
+            height: 32,
+            bgcolor: view === 'grid' ? '#1e3a5f' : 'transparent',
+            color: view === 'grid' ? 'white' : '#64748b',
+            '&:hover': { bgcolor: view === 'grid' ? '#162d4a' : '#f1f5f9' },
+          }}
+        >
+          <LayoutGrid size={15} />
+        </IconButton>
+      </Tooltip>
+    </Box>
+  )
+}