feat: anonymes Suchprofil — Toggle im Speichern-Schritt, supply-side Masking

- Toggle 'Anonymes Suchprofil' im AISearchSavePreview (nicht in Suchmaske)
- Box wechselt zu lila wenn aktiv, Text erklärt was anonymisiert wird
- isAnonymous wird via buildNeedInput in gespeichertes Need geschrieben
- MatchListCard + NeedSelectionPanel: zeigen 'Anonyme Anfrage' (lila) statt Firmenname

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

src/components/match-center/NeedSelectionPanel.tsx

@@ -32,9 +32,14 @@ export function NeedSelectionPanel({ matches }: Props) {
             }}
           >
             <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start', mb: 0.5 }}>
-              <Typography variant="body2" sx={{ fontWeight: 600, lineHeight: 1.3, flex: 1, mr: 0.5 }}>
-                {need.companyName}
-              </Typography>
+              <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, flex: 1, mr: 0.5, minWidth: 0 }}>
+                <Typography variant="body2" sx={{ fontWeight: 600, lineHeight: 1.3 }} noWrap>
+                  {need.isAnonymous ? 'Anonyme Anfrage' : need.companyName}
+                </Typography>
+                {need.isAnonymous && (
+                  <Chip label="Anonym" size="small" sx={{ bgcolor: '#f5f3ff', color: '#6d28d9', fontSize: 9, height: 16, fontWeight: 700, flexShrink: 0, border: '1px solid #ddd6fe' }} />
+                )}
+              </Box>
               {pendingCount > 0 && (
                 <Chip label={pendingCount} size="small"
                   sx={{ bgcolor: '#d97706', color: 'white', fontSize: 10, height: 18, minWidth: 22 }} />