fix(sync): use frequency-based date column detection for Untersuchungen to find all exam rows

sync/src/scraper.ts

@@ -1032,17 +1032,25 @@ async function scrapeMemberUntersuchungen(
     cells: r.cells.map(c => c.replace(/\u00A0/g, ' ').trim()),
   }));
 
-  // Find date column
+  // Find date column dynamically: count date matches per column across ALL rows
+  // and pick the column with the MOST matches (avoids picking stray date in nav tables)
   const datePattern = /^\d{2}\.\d{2}\.\d{4}$/;
-  let dateColIdx = -1;
+  const dateCountByCol: Record<number, number> = {};
   for (const r of mapped) {
     for (let ci = 0; ci < r.cells.length; ci++) {
       if (datePattern.test(r.cells[ci] ?? '')) {
-        dateColIdx = ci;
-        break;
+        dateCountByCol[ci] = (dateCountByCol[ci] || 0) + 1;
       }
     }
-    if (dateColIdx >= 0) break;
+  }
+  let dateColIdx = -1;
+  let maxCount = 0;
+  for (const [col, count] of Object.entries(dateCountByCol)) {
+    const colNum = Number(col);
+    if (count > maxCount || (count === maxCount && (dateColIdx === -1 || colNum < dateColIdx))) {
+      dateColIdx = colNum;
+      maxCount = count;
+    }
   }
 
   const dataRows = dateColIdx >= 0