fix: Admin Edit-Button + Email-Kontenverwaltung in Einstellungen

- Fix: Admin Edit/Delete-Buttons reagieren jetzt (@click.stop)
- Neu: Email-Kontenverwaltung in den Benutzer-Einstellungen
  - IMAP/SMTP-Server, Port, SSL, Anmeldedaten konfigurieren
  - Konten hinzufuegen, bearbeiten, loeschen
  - Verbindungstest-Button
  - Standard-Konto festlegen

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

frontend/src/views/AdminView.vue

@@ -42,8 +42,8 @@
         <Column field="storage_quota_mb" header="Quota (MB)" />
         <Column header="Aktionen" style="width: 120px">
           <template #body="{ data }">
-            <Button icon="pi pi-pencil" text rounded size="small" @click="openEditUser(data)" />
-            <Button icon="pi pi-trash" text rounded size="small" severity="danger" @click="confirmDeleteUser(data)" />
+            <Button icon="pi pi-pencil" text rounded size="small" @click.stop="openEditUser(data)" />
+            <Button icon="pi pi-trash" text rounded size="small" severity="danger" @click.stop="confirmDeleteUser(data)" />
           </template>
         </Column>
       </DataTable>

frontend/src/views/SettingsView.vue

@@ -4,6 +4,7 @@
       <h2>Einstellungen</h2>
     </div>
 
+    <!-- Profile -->
     <div class="settings-section">
       <h3>Profil</h3>
       <div class="settings-info">
@@ -22,6 +23,7 @@
       </div>
     </div>
 
+    <!-- Change Password -->
     <div class="settings-section">
       <h3>Passwort aendern</h3>
       <form @submit.prevent="handleChangePassword" class="password-form">
@@ -42,18 +44,130 @@
         <Button type="submit" label="Passwort aendern" :loading="pwLoading" />
       </form>
     </div>
+
+    <!-- Email Accounts -->
+    <div class="settings-section">
+      <div class="section-header">
+        <h3>E-Mail-Konten</h3>
+        <Button icon="pi pi-plus" label="Konto hinzufuegen" size="small" @click="openNewAccount" />
+      </div>
+
+      <div v-if="!emailAccounts.length" class="empty-hint">
+        <i class="pi pi-envelope"></i>
+        <p>Keine E-Mail-Konten konfiguriert. Fuege ein Konto hinzu, um den E-Mail-Client zu nutzen.</p>
+      </div>
+
+      <div v-for="account in emailAccounts" :key="account.id" class="email-account-card">
+        <div class="account-info">
+          <div class="account-name">
+            <i class="pi pi-envelope"></i>
+            <strong>{{ account.display_name }}</strong>
+            <Tag v-if="account.is_default" value="Standard" size="small" severity="info" />
+          </div>
+          <div class="account-detail">{{ account.email_address }}</div>
+          <div class="account-detail">IMAP: {{ account.imap_host }}:{{ account.imap_port }} | SMTP: {{ account.smtp_host }}:{{ account.smtp_port }}</div>
+        </div>
+        <div class="account-actions">
+          <Button icon="pi pi-pencil" text size="small" @click="openEditAccount(account)" />
+          <Button icon="pi pi-check-circle" text size="small" title="Verbindung testen" @click="testAccount(account)" />
+          <Button icon="pi pi-trash" text size="small" severity="danger" @click="confirmDeleteAccount(account)" />
+        </div>
+      </div>
+    </div>
+
+    <!-- Email Account Dialog -->
+    <Dialog v-model:visible="showAccountDialog" :header="editingAccount ? 'E-Mail-Konto bearbeiten' : 'Neues E-Mail-Konto'" modal :style="{ width: '550px' }">
+      <div class="field">
+        <label>Anzeigename</label>
+        <InputText v-model="accountForm.display_name" placeholder="z.B. Arbeit, Privat" fluid autofocus />
+      </div>
+      <div class="field">
+        <label>E-Mail-Adresse</label>
+        <InputText v-model="accountForm.email_address" type="email" placeholder="name@beispiel.de" fluid />
+      </div>
+
+      <h4 class="section-title">Posteingang (IMAP)</h4>
+      <div class="field-row">
+        <div class="field flex-grow">
+          <label>IMAP-Server</label>
+          <InputText v-model="accountForm.imap_host" placeholder="imap.beispiel.de" fluid />
+        </div>
+        <div class="field" style="width: 100px">
+          <label>Port</label>
+          <InputText v-model.number="accountForm.imap_port" type="number" fluid />
+        </div>
+        <div class="field" style="width: 80px">
+          <label>SSL</label>
+          <InputSwitch v-model="accountForm.imap_ssl" />
+        </div>
+      </div>
+
+      <h4 class="section-title">Postausgang (SMTP)</h4>
+      <div class="field-row">
+        <div class="field flex-grow">
+          <label>SMTP-Server</label>
+          <InputText v-model="accountForm.smtp_host" placeholder="smtp.beispiel.de" fluid />
+        </div>
+        <div class="field" style="width: 100px">
+          <label>Port</label>
+          <InputText v-model.number="accountForm.smtp_port" type="number" fluid />
+        </div>
+        <div class="field" style="width: 80px">
+          <label>SSL</label>
+          <InputSwitch v-model="accountForm.smtp_ssl" />
+        </div>
+      </div>
+
+      <h4 class="section-title">Anmeldedaten</h4>
+      <div class="field">
+        <label>Benutzername</label>
+        <InputText v-model="accountForm.username" placeholder="Oft die E-Mail-Adresse" fluid />
+      </div>
+      <div class="field">
+        <label>{{ editingAccount ? 'Passwort (leer = nicht aendern)' : 'Passwort' }}</label>
+        <Password v-model="accountForm.password" :feedback="false" toggle-mask fluid />
+      </div>
+
+      <div class="field">
+        <label><input type="checkbox" v-model="accountForm.is_default" /> Als Standard-Konto verwenden</label>
+      </div>
+
+      <Message v-if="accountError" severity="error" :closable="false">{{ accountError }}</Message>
+
+      <template #footer>
+        <Button label="Abbrechen" text @click="showAccountDialog = false" />
+        <Button :label="editingAccount ? 'Speichern' : 'Hinzufuegen'" @click="saveAccount" :loading="accountSaving" />
+      </template>
+    </Dialog>
+
+    <!-- Delete Account Confirm -->
+    <Dialog v-model:visible="showDeleteAccount" header="E-Mail-Konto loeschen" modal :style="{ width: '400px' }">
+      <p>Moechtest du das Konto <strong>{{ deleteAccountTarget?.display_name }}</strong> ({{ deleteAccountTarget?.email_address }}) wirklich loeschen?</p>
+      <template #footer>
+        <Button label="Abbrechen" text @click="showDeleteAccount = false" />
+        <Button label="Loeschen" severity="danger" @click="doDeleteAccount" />
+      </template>
+    </Dialog>
   </div>
 </template>
 
 <script setup>
-import { ref } from 'vue'
+import { ref, onMounted } from 'vue'
 import { useAuthStore } from '../stores/auth'
+import { useToast } from 'primevue/usetoast'
+import apiClient from '../api/client'
 import Password from 'primevue/password'
 import Button from 'primevue/button'
 import Message from 'primevue/message'
 import Tag from 'primevue/tag'
+import Dialog from 'primevue/dialog'
+import InputText from 'primevue/inputtext'
+import InputSwitch from 'primevue/inputswitch'
 
 const auth = useAuthStore()
+const toast = useToast()
+
+// --- Password change ---
 const currentPassword = ref('')
 const newPassword = ref('')
 const newPassword2 = ref('')
@@ -83,22 +197,153 @@ async function handleChangePassword() {
     pwLoading.value = false
   }
 }
+
+// --- Email Accounts ---
+const emailAccounts = ref([])
+const showAccountDialog = ref(false)
+const editingAccount = ref(null)
+const accountForm = ref({
+  display_name: '', email_address: '', imap_host: '', imap_port: 993, imap_ssl: true,
+  smtp_host: '', smtp_port: 587, smtp_ssl: true, username: '', password: '', is_default: false,
+})
+const accountError = ref('')
+const accountSaving = ref(false)
+const showDeleteAccount = ref(false)
+const deleteAccountTarget = ref(null)
+
+function getEncKey() { return auth.masterKeySalt || '' }
+
+async function loadAccounts() {
+  try {
+    const res = await apiClient.get('/email/accounts')
+    emailAccounts.value = res.data
+  } catch { emailAccounts.value = [] }
+}
+
+function openNewAccount() {
+  editingAccount.value = null
+  accountForm.value = {
+    display_name: '', email_address: '', imap_host: '', imap_port: 993, imap_ssl: true,
+    smtp_host: '', smtp_port: 587, smtp_ssl: true, username: '', password: '', is_default: false,
+  }
+  accountError.value = ''
+  showAccountDialog.value = true
+}
+
+function openEditAccount(account) {
+  editingAccount.value = account
+  accountForm.value = {
+    display_name: account.display_name,
+    email_address: account.email_address,
+    imap_host: account.imap_host,
+    imap_port: account.imap_port,
+    imap_ssl: account.imap_ssl,
+    smtp_host: account.smtp_host,
+    smtp_port: account.smtp_port,
+    smtp_ssl: account.smtp_ssl,
+    username: account.username,
+    password: '',
+    is_default: account.is_default,
+  }
+  accountError.value = ''
+  showAccountDialog.value = true
+}
+
+async function saveAccount() {
+  accountError.value = ''
+  accountSaving.value = true
+  try {
+    const payload = { ...accountForm.value }
+    const headers = { 'X-Encryption-Key': getEncKey() }
+
+    if (editingAccount.value) {
+      if (!payload.password) delete payload.password
+      await apiClient.put(`/email/accounts/${editingAccount.value.id}`, payload, { headers })
+      toast.add({ severity: 'success', summary: 'Konto aktualisiert', life: 3000 })
+    } else {
+      if (!payload.password) {
+        accountError.value = 'Passwort erforderlich'
+        return
+      }
+      await apiClient.post('/email/accounts', payload, { headers })
+      toast.add({ severity: 'success', summary: 'Konto hinzugefuegt', life: 3000 })
+    }
+    showAccountDialog.value = false
+    await loadAccounts()
+    await auth.fetchMe()
+  } catch (err) {
+    accountError.value = err.response?.data?.error || 'Fehler beim Speichern'
+  } finally {
+    accountSaving.value = false
+  }
+}
+
+async function testAccount(account) {
+  try {
+    await apiClient.post(`/email/accounts/${account.id}/test`, {}, {
+      headers: { 'X-Encryption-Key': getEncKey() },
+    })
+    toast.add({ severity: 'success', summary: 'Verbindung erfolgreich', detail: `${account.display_name}: IMAP-Verbindung OK`, life: 5000 })
+  } catch (err) {
+    toast.add({ severity: 'error', summary: 'Verbindung fehlgeschlagen', detail: err.response?.data?.error, life: 8000 })
+  }
+}
+
+function confirmDeleteAccount(account) {
+  deleteAccountTarget.value = account
+  showDeleteAccount.value = true
+}
+
+async function doDeleteAccount() {
+  if (!deleteAccountTarget.value) return
+  try {
+    await apiClient.delete(`/email/accounts/${deleteAccountTarget.value.id}`)
+    showDeleteAccount.value = false
+    toast.add({ severity: 'success', summary: 'Konto geloescht', life: 3000 })
+    await loadAccounts()
+    await auth.fetchMe()
+  } catch (err) {
+    toast.add({ severity: 'error', summary: 'Fehler', detail: err.response?.data?.error, life: 5000 })
+  }
+}
+
+onMounted(loadAccounts)
 </script>
 
 <style scoped>
 .view-container { padding: 1.5rem; }
 .view-header h2 { margin: 0 0 1.5rem; }
 .settings-section {
-  background: var(--p-surface-0);
-  border-radius: 8px;
-  padding: 1.5rem;
-  margin-bottom: 1.5rem;
+  background: var(--p-surface-0); border-radius: 8px; padding: 1.5rem; margin-bottom: 1.5rem;
 }
 .settings-section h3 { margin: 0 0 1rem; font-size: 1.125rem; }
+.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
+.section-header h3 { margin: 0; }
 .settings-info { display: flex; flex-direction: column; gap: 0.5rem; }
 .info-row { display: flex; align-items: center; gap: 0.5rem; }
 .info-row .label { font-weight: 500; min-width: 120px; }
 .password-form { max-width: 400px; }
 .password-form .field { margin-bottom: 1rem; }
 .password-form .field label { display: block; margin-bottom: 0.5rem; font-weight: 500; font-size: 0.875rem; }
+
+.empty-hint {
+  display: flex; align-items: center; gap: 0.75rem; padding: 1.5rem;
+  background: var(--p-surface-50); border-radius: 6px; color: var(--p-text-muted-color);
+}
+.empty-hint i { font-size: 1.5rem; }
+.empty-hint p { margin: 0; }
+
+.email-account-card {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 1rem; border: 1px solid var(--p-surface-200); border-radius: 8px; margin-bottom: 0.5rem;
+}
+.account-name { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.25rem; }
+.account-detail { font-size: 0.825rem; color: var(--p-text-muted-color); }
+.account-actions { display: flex; gap: 0; flex-shrink: 0; }
+
+.section-title { margin: 1rem 0 0.5rem; font-size: 0.95rem; font-weight: 600; }
+.field { margin-bottom: 1rem; }
+.field label { display: block; margin-bottom: 0.5rem; font-weight: 500; font-size: 0.875rem; }
+.field-row { display: flex; gap: 0.75rem; align-items: flex-end; }
+.flex-grow { flex: 1; }
 </style>