Verbessere die Sortierlogik in der Mitgliederliste für Namen, Nachnamen und Geburtstage mit robusteren Vergleichen

pages/mitgliederbereich/mitglieder.vue

@@ -764,17 +764,45 @@ const sortedMembers = computed(() => {
   if (!Array.isArray(members.value)) return []
   const arr = [...members.value]
   if (sortMode.value === 'name') {
-    arr.sort((a, b) => (a.name || '').localeCompare(b.name || ''))
+    arr.sort((a, b) => {
+      const an = (a.name || '').toLocaleLowerCase()
+      const bn = (b.name || '').toLocaleLowerCase()
+      return an.localeCompare(bn)
+    })
   } else if (sortMode.value === 'lastname') {
-    arr.sort((a, b) => (a.lastName || '').localeCompare(b.lastName || ''))
+    arr.sort((a, b) => {
+      // Fallback: lastName, dann firstName
+      const al = (a.lastName || a.name?.split(' ').slice(-1)[0] || '').toLocaleLowerCase()
+      const bl = (b.lastName || b.name?.split(' ').slice(-1)[0] || '').toLocaleLowerCase()
+      if (al === bl) {
+        const af = (a.firstName || a.name?.split(' ')[0] || '').toLocaleLowerCase()
+        const bf = (b.firstName || b.name?.split(' ')[0] || '').toLocaleLowerCase()
+        return af.localeCompare(bf)
+      }
+      return al.localeCompare(bl)
+    })
   } else if (sortMode.value === 'birthday') {
     arr.sort((a, b) => {
-      if (!a.birthday) return 1
-      if (!b.birthday) return -1
-      // Nur Tag und Monat vergleichen
-      const [ay, am, ad] = a.birthday.split('-')
-      const [by, bm, bd] = b.birthday.split('-')
-      return (am + ad).localeCompare(bm + bd)
+      // Robust: akzeptiere YYYY-MM-DD, DD.MM.YYYY, ggf. nur MM-TT
+      function parseBirthday(val) {
+        if (!val) return null
+        if (val.includes('-')) {
+          const parts = val.split('-')
+          if (parts.length === 3) return { m: parts[1].padStart(2, '0'), d: parts[2].padStart(2, '0') }
+        } else if (val.includes('.')) {
+          const parts = val.split('.')
+          if (parts.length >= 2) return { d: parts[0].padStart(2, '0'), m: parts[1].padStart(2, '0') }
+        }
+        return null
+      }
+      const ad = parseBirthday(a.birthday)
+      const bd = parseBirthday(b.birthday)
+      if (!ad && !bd) return 0
+      if (!ad) return 1
+      if (!bd) return -1
+      // Monat zuerst, dann Tag
+      if (ad.m === bd.m) return ad.d.localeCompare(bd.d)
+      return ad.m.localeCompare(bd.m)
     })
   }
   return arr