fix: correct rent unit labels and monthly/annual calculation consistency

- NeedAlignmentPanel: display budget row in monthly (CHF/m²/Mt.) to match
  the Preis section, use exact division (no Math.round) to avoid 13×12≠152
- MatchDetailPropertySections + PropertyDetailPublicSections: replace
  Math.round(rentPricePerSqm/12) with exact division; show 2 decimal places
  when monthly is not a whole number (e.g. CHF 12.67 instead of CHF 13)
- Add /Jahr suffix to all 15 displays showing rentPricePerSqm or maxPerSqm
  without a time unit across results, compare, match-detail, supply, and
  anfragencenter components

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

src/components/match-detail/LocationIntelligencePanel.tsx

@@ -241,7 +241,7 @@ export function LocationIntelligencePanel({ property }: Props) {
                   {p.title}
                 </Typography>
                 <Typography variant="caption" color="text.secondary">
-                  {p.areaSqm} m² · CHF {p.rentPricePerSqm}/m²
+                  {p.areaSqm} m² · CHF {p.rentPricePerSqm}/m²/Jahr
                   {p.rentPricePerSqm < property.rentPricePerSqm && ' · günstiger'}
                   {p.rentPricePerSqm > property.rentPricePerSqm && ' · teurer'}
                 </Typography>