feat: Passwort-Manager Mehrfachauswahl + Bulk-Loeschen

Checkbox pro Eintrag, "Alle auswaehlen" oben und roter Loesch-Button mit
Anzahl. Sicherheitsabfrage vor dem Loeschen.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/PasswordsView.vue

@@ -29,9 +29,22 @@
           <InputText v-model="searchQuery" placeholder="Passwoerter suchen..." fluid />
         </div>
 
+        <div v-if="filteredEntries.length" class="selection-bar">
+          <Checkbox v-model="allSelected" :binary="true" @change="toggleSelectAll" inputId="select-all" />
+          <label for="select-all" class="select-all-label">
+            Alle auswaehlen
+            <span v-if="selectedIds.length" class="selected-count">({{ selectedIds.length }} ausgewaehlt)</span>
+          </label>
+          <Button v-if="selectedIds.length" icon="pi pi-trash" :label="`${selectedIds.length} loeschen`"
+                  severity="danger" size="small" @click="deleteSelected" />
+        </div>
+
         <div class="entries-list">
           <div v-for="entry in filteredEntries" :key="entry.id"
-               class="entry-item" @click="openEntry(entry)">
+               class="entry-item" :class="{ selected: selectedIds.includes(entry.id) }"
+               @click="openEntry(entry)">
+            <Checkbox :modelValue="selectedIds.includes(entry.id)" :binary="true"
+                      @click.stop @update:modelValue="toggleSelect(entry.id)" />
             <div class="entry-icon">
               <i class="pi pi-key"></i>
             </div>
@@ -166,6 +179,7 @@ import InputText from 'primevue/inputtext'
 import Password from 'primevue/password'
 import Textarea from 'primevue/textarea'
 import Select from 'primevue/select'
+import Checkbox from 'primevue/checkbox'
 
 const toast = useToast()
 const auth = useAuthStore()
@@ -200,6 +214,45 @@ const importAccept = computed(() => {
 const showTotpDialog = ref(false)
 const totpCode = ref('')
 
+const selectedIds = ref([])
+const allSelected = computed({
+  get: () => filteredEntries.value.length > 0 && filteredEntries.value.every(e => selectedIds.value.includes(e.id)),
+  set: () => {},
+})
+
+function toggleSelectAll() {
+  const visibleIds = filteredEntries.value.map(e => e.id)
+  const allSel = visibleIds.every(id => selectedIds.value.includes(id))
+  if (allSel) {
+    selectedIds.value = selectedIds.value.filter(id => !visibleIds.includes(id))
+  } else {
+    const set = new Set([...selectedIds.value, ...visibleIds])
+    selectedIds.value = [...set]
+  }
+}
+
+function toggleSelect(id) {
+  const i = selectedIds.value.indexOf(id)
+  if (i >= 0) selectedIds.value.splice(i, 1)
+  else selectedIds.value.push(id)
+}
+
+async function deleteSelected() {
+  const n = selectedIds.value.length
+  if (!n) return
+  if (!window.confirm(`${n} Eintrag/Eintraege wirklich loeschen?`)) return
+  let ok = 0
+  for (const id of [...selectedIds.value]) {
+    try {
+      await apiClient.delete(`/passwords/entries/${id}`)
+      ok++
+    } catch { /* skip */ }
+  }
+  selectedIds.value = []
+  toast.add({ severity: 'success', summary: `${ok} Eintrag/Eintraege geloescht`, life: 3000 })
+  await loadEntries()
+}
+
 const folderOptions = computed(() => [{ id: null, name: '(Kein Ordner)' }, ...folders.value])
 const filteredEntries = computed(() => {
   if (!searchQuery.value) return entries.value
@@ -491,6 +544,10 @@ onMounted(async () => {
 .shared-label { color: var(--p-text-muted-color); font-size: 0.75rem; }
 .entries-main { flex: 1; }
 .search-bar { margin-bottom: 1rem; }
+.selection-bar { display: flex; align-items: center; gap: 0.75rem; padding: 0.5rem 0.75rem; margin-bottom: 0.5rem; background: var(--p-surface-50); border-radius: 6px; }
+.select-all-label { font-size: 0.875rem; cursor: pointer; flex: 1; }
+.selected-count { color: var(--p-text-muted-color); margin-left: 0.5rem; }
+.entry-item.selected { background: var(--p-primary-50); }
 .entries-list { display: flex; flex-direction: column; gap: 2px; }
 .entry-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; background: var(--p-surface-0); border-radius: 6px; cursor: pointer; }
 .entry-item:hover { background: var(--p-surface-100); }