feat(chat): add chat room management functionality

- Created new chat schema in the database.
- Implemented chat room model with necessary fields (title, ownerId, roomTypeId, etc.).
- Added room type model and rights model for chat functionality.
- Developed API endpoints for managing chat rooms, including create, edit, and delete operations.
- Integrated chat room management into the admin interface with a dedicated view and dialog for room creation/editing.
- Added internationalization support for chat room management UI.
- Implemented autocomplete for victim selection in underground activities.
- Enhanced the underground view with new activity types and political target selection.

frontend/src/views/admin/ChatRoomsView.vue

@@ -0,0 +1,109 @@
+
+<template>
+  <div class="admin-chat-rooms">
+    <h2>{{ $t('admin.chatrooms.title') }}</h2>
+    <button class="create-btn" @click="openCreateDialog">{{ $t('admin.chatrooms.create') }}</button>
+    <table class="rooms-table">
+      <thead>
+        <tr>
+          <th>{{ $t('admin.chatrooms.roomName') }}</th>
+          <th>{{ $t('admin.chatrooms.type') }}</th>
+          <th>{{ $t('admin.chatrooms.isPublic') }}</th>
+          <th>{{ $t('admin.chatrooms.actions') }}</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr v-for="room in rooms" :key="room.id">
+          <td>{{ room.title }}</td>
+          <td>{{ room.roomTypeTr || room.roomTypeId }}</td>
+          <td>{{ room.isPublic ? $t('common.yes') : $t('common.no') }}</td>
+          <td>
+            <button @click="editRoom(room)">{{ $t('common.edit') }}</button>
+            <button @click="deleteRoom(room)">{{ $t('common.delete') }}</button>
+          </td>
+        </tr>
+      </tbody>
+    </table>
+  <RoomDialog ref="roomDialog" :room="selectedRoom" @save="fetchRooms" />
+  </div>
+</template>
+
+<script>
+import RoomDialog from '@/dialogues/admin/RoomDialog.vue';
+import apiClient from '@/utils/axios.js';
+
+export default {
+  name: 'AdminChatRoomsView',
+  components: { RoomDialog },
+  data() {
+    return {
+      rooms: [],
+  // dialog: false, // removed, handled by DialogWidget
+      selectedRoom: null,
+  // headers entfernt, da eigene Tabelle
+  // roomTypeTr sollte beim Laden der Räume mitgeliefert werden (API/Backend)
+    }
+  },
+  mounted() {
+    this.fetchRooms();
+  },
+  methods: {
+    openCreateDialog() {
+      this.selectedRoom = null;
+      this.$refs.roomDialog.open();
+    },
+    editRoom(room) {
+      this.selectedRoom = { ...room };
+      this.$refs.roomDialog.open(this.selectedRoom);
+    },
+    async deleteRoom(room) {
+      if (!room.id) return;
+  await apiClient.delete(`/api/admin/chat/rooms/${room.id}`);
+      this.fetchRooms();
+    },
+    async fetchRooms() {
+  const res = await apiClient.get('/api/admin/chat/rooms');
+      this.rooms = res.data;
+    },
+  },
+}
+</script>
+
+<style scoped>
+.admin-chat-rooms {
+  max-width: 900px;
+  margin: 0 auto;
+}
+.create-btn {
+  margin-bottom: 12px;
+  padding: 6px 18px;
+  border: none;
+  border-radius: 3px;
+  background: #1976d2;
+  color: #fff;
+  cursor: pointer;
+}
+.rooms-table {
+  width: 100%;
+  border-collapse: collapse;
+}
+.rooms-table th, .rooms-table td {
+  border: 1px solid #ddd;
+  padding: 8px;
+}
+.rooms-table th {
+  background: #f5f5f5;
+}
+.rooms-table td button {
+  margin-right: 6px;
+  padding: 4px 12px;
+  border: none;
+  border-radius: 3px;
+  background: #eee;
+  cursor: pointer;
+}
+.rooms-table td button:hover {
+  background: #1976d2;
+  color: #fff;
+}
+</style>