feat: Future Availability Intelligence — rebrand & card redesign

Replaces "Schattenmarkt" branding with professional Future Availability
Intelligence throughout the UI. Two distinct card types: Pre-Market
(LEASE_EXPIRY + verified, green accent) and Market Signal (probabilistic,
blue accent). Professioneller Data-Header replaces dark purple gradient.
New detail panel sections: Erkannte Marktindikatoren, Strategische
Interpretation, Bestätigt/Nicht bestätigt. All 15 mock signals enriched
with concrete Swiss CRE market indicators and strategic interpretations.
Signal quality shown as 4-dot indicator (Hoch/Mittel/Niedrig).

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

src/components/results/ResultFilterBar.tsx

@@ -10,8 +10,8 @@ interface Props {
   onFilterChange: (v: FilterSource) => void
   sortBy: SortBy
   onSortChange: (v: SortBy) => void
-  showSchattenmarkt: boolean
-  onShowSchattenmarktChange: (v: boolean) => void
+  showFutureAvailability: boolean
+  onShowFutureAvailabilityChange: (v: boolean) => void
   showOwnProperties?: boolean
   onShowOwnPropertiesChange?: (v: boolean) => void
   isPropertyManager?: boolean
@@ -34,8 +34,8 @@ export function ResultFilterBar({
   onFilterChange,
   sortBy,
   onSortChange,
-  showSchattenmarkt,
-  onShowSchattenmarktChange,
+  showFutureAvailability,
+  onShowFutureAvailabilityChange,
   showOwnProperties,
   onShowOwnPropertiesChange,
   isPropertyManager,
@@ -68,19 +68,19 @@ export function ResultFilterBar({
 
           <Divider orientation="vertical" flexItem sx={{ mx: 0.5 }} />
 
-          {/* Schattenmarkt toggle */}
+          {/* Future Availability toggle */}
           <Chip
             size="small"
             clickable
-            icon={<Zap size={11} color={showSchattenmarkt ? '#7c3aed' : '#94a3b8'} />}
-            label="Schattenmarkt"
-            onClick={() => onShowSchattenmarktChange(!showSchattenmarkt)}
+            icon={<Zap size={11} color={showFutureAvailability ? '#7c3aed' : '#94a3b8'} />}
+            label="Future Availability"
+            onClick={() => onShowFutureAvailabilityChange(!showFutureAvailability)}
             sx={{
-              bgcolor: showSchattenmarkt ? '#f3e8ff' : 'transparent',
-              color: showSchattenmarkt ? '#6d28d9' : 'text.disabled',
-              border: `1px solid ${showSchattenmarkt ? '#c4b5fd' : '#e2e8f0'}`,
-              fontWeight: showSchattenmarkt ? 600 : 400,
-              textDecoration: showSchattenmarkt ? 'none' : 'line-through',
+              bgcolor: showFutureAvailability ? '#f3e8ff' : 'transparent',
+              color: showFutureAvailability ? '#6d28d9' : 'text.disabled',
+              border: `1px solid ${showFutureAvailability ? '#c4b5fd' : '#e2e8f0'}`,
+              fontWeight: showFutureAvailability ? 600 : 400,
+              textDecoration: showFutureAvailability ? 'none' : 'line-through',
               '& .MuiChip-icon': { ml: 0.75 },
             }}
           />