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.

backend/models/chat/room.js

@@ -0,0 +1,69 @@
+import { DataTypes } from 'sequelize';
+import { sequelize } from '../../utils/sequelize.js';
+
+const Room = sequelize.define('Room', {
+    id: {
+        type: DataTypes.INTEGER,
+        primaryKey: true,
+        autoIncrement: true,
+    },
+    title: {
+        type: DataTypes.TEXT,
+        allowNull: false,
+    },
+    ownerId: {
+        type: DataTypes.INTEGER,
+        allowNull: true, // kann null sein, wenn system-owned
+    },
+    roomTypeId: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+    },
+    isPublic: {
+        type: DataTypes.BOOLEAN,
+        allowNull: false,
+        defaultValue: true,
+    },
+    genderRestrictionId: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+    },
+    password: {
+        type: DataTypes.STRING,
+        allowNull: true,
+    },
+    minAge: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+    },
+    maxAge: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+    },
+    passwordHash: {
+        type: DataTypes.TEXT,
+        allowNull: true,
+    },
+    friendsOfOwnerOnly: {
+        type: DataTypes.BOOLEAN,
+        allowNull: false,
+        defaultValue: false,
+    },
+    requiredUserRightId: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+    },
+}, {
+    schema: 'chat',
+    tableName: 'room',
+    timestamps: true,
+    underscored: true,
+    indexes: [
+        {
+            name: 'idx_chat_room_owner',
+            fields: ['owner_id'],
+        },
+    ],
+});
+
+export default Room;