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/PropertyDetailPublicSections.tsx

@@ -37,8 +37,11 @@ export function PropertyDetailPublicSections({ property, highlightUnitId }: Prop
   const otherUnits = (property.units ?? []).filter(u => !u.schattenmarktRelease?.enabled)
   const flexibleUnits = (property.units ?? []).filter(u => u.isFlexible && u.minLettableSqm !== undefined)
 
-  const monthlyPerSqm = Math.round(property.rentPricePerSqm / 12)
   const totalMonthly = Math.round(property.areaSqm * property.rentPricePerSqm / 12)
+  const rawMonthlyPerSqm = property.rentPricePerSqm / 12
+  const monthlyPerSqmLabel = Number.isInteger(rawMonthlyPerSqm)
+    ? `CHF ${rawMonthlyPerSqm}.–`
+    : `CHF ${rawMonthlyPerSqm.toLocaleString('de-CH', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`
   const minLettable = property.areaSqmMin
     ?? (flexibleUnits.length > 0
       ? Math.min(...flexibleUnits.map(u => u.minLettableSqm!))
@@ -58,7 +61,7 @@ export function PropertyDetailPublicSections({ property, highlightUnitId }: Prop
           <Typography variant="h6" sx={{ fontWeight: 700 }}>Preis</Typography>
         </Box>
         <KeyFactRow label="Monatliche Miete" value={`CHF ${totalMonthly.toLocaleString('de-CH')}.–`} />
-        <KeyFactRow label="Pro m²/Monat" value={`CHF ${monthlyPerSqm.toLocaleString('de-CH')}.–`} />
+        <KeyFactRow label="Pro m²/Monat" value={monthlyPerSqmLabel} />
         <KeyFactRow label="Pro m²/Jahr" value={`CHF ${property.rentPricePerSqm.toLocaleString('de-CH')}.–`} />
         {property.ancillaryCosts != null && (
           <KeyFactRow