refactor(tournament): clean up placeholder handling in PDF generation

- Removed placeholder variables for missing participant data in the TournamentPlacementsTab component.
- Updated the PDF generation logic to use empty strings instead of placeholders for missing data fields, improving the clarity of the generated reports.
- Adjusted cell styles to ensure consistent formatting in the PDF output.

frontend/src/components/tournament/TournamentPlacementsTab.vue

@@ -718,9 +718,6 @@ export default {
                     } catch (e) { return d; }
                 };
 
-                const missing = t('tournaments.dataNotRecorded');
-                const linePlaceholder = '____________________';
-
                 // Tabelle
                 const head = [[
                     t('members.firstName') + ' / ' + t('members.lastName'),
@@ -733,11 +730,11 @@ export default {
 
                 const body = playersWithMissing.map(p => [
                     p.name,
-                    p.birthDate ? formatDate(p.birthDate) : linePlaceholder,
-                    p.gender ? formatGender(p.gender) : linePlaceholder,
-                    p.address || linePlaceholder,
-                    p.phone || linePlaceholder,
-                    p.email || linePlaceholder
+                    p.birthDate ? formatDate(p.birthDate) : '',
+                    p.gender ? formatGender(p.gender) : '',
+                    p.address || '',
+                    p.phone || '',
+                    p.email || ''
                 ]);
 
                 autoTable(pdf, {
@@ -750,7 +747,8 @@ export default {
                         cellPadding: 3,
                         lineColor: [200, 200, 200],
                         lineWidth: 0.25,
-                        valign: 'middle'
+                        valign: 'middle',
+                        minCellHeight: 10
                     },
                     headStyles: {
                         fillColor: [76, 175, 80],
@@ -765,13 +763,6 @@ export default {
                         3: { cellWidth: 50 },
                         4: { cellWidth: 40 },
                         5: { cellWidth: 50 }
-                    },
-                    didParseCell: (data) => {
-                        // Platzhalter-Zeilen grau und kursiv markieren
-                        if (data.section === 'body' && data.cell.raw === linePlaceholder) {
-                            data.cell.styles.textColor = [180, 180, 180];
-                            data.cell.styles.fontStyle = 'italic';
-                        }
                     }
                 });