feat(DiaryDateActivity, DiaryView): integrate groupId for enhanced activity management

- Added `groupId` field to the DiaryDateActivity model to support group-specific activities.
- Updated create and update methods in DiaryDateActivityService to handle groupId, ensuring proper validation and association with groups.
- Enhanced DiaryView component to allow selection of groups for activities, improving user experience and activity organization.
- Implemented filtering logic in DiaryView to display activities based on selected group, enhancing data clarity and usability.

backend/models/DiaryDateActivity.js

@@ -2,6 +2,7 @@ import { DataTypes } from 'sequelize';
 import sequelize from '../database.js';
 import DiaryDate from './DiaryDates.js';
 import PredefinedActivity from './PredefinedActivity.js';
+import Group from './Group.js';
 
 const DiaryDateActivity = sequelize.define('DiaryDateActivity', {
     id: {
@@ -31,6 +32,15 @@ const DiaryDateActivity = sequelize.define('DiaryDateActivity', {
             key: 'id',
         },
         onDelete: 'SET NULL',
+    },
+    groupId: {
+        type: DataTypes.INTEGER,
+        allowNull: true,
+        references: {
+            model: Group,
+            key: 'id'
+        },
+        onDelete: 'SET NULL'
     },
      duration: {
         type: DataTypes.INTEGER,

backend/models/index.js

@@ -219,6 +219,9 @@ GroupActivity.belongsTo(Group, { foreignKey: 'groupId', as: 'groupsGroupActivity
 GroupActivity.belongsTo(PredefinedActivity, { foreignKey: 'customActivity', as: 'groupPredefinedActivity' });
 PredefinedActivity.hasMany(GroupActivity, { foreignKey: 'predefinedActivityId', as: 'groupPredefinedActivities' });
 
+DiaryDateActivity.belongsTo(Group, { foreignKey: 'groupId', as: 'planGroup' });
+Group.hasMany(DiaryDateActivity, { foreignKey: 'groupId', as: 'groupPlanItems' });
+
 DiaryTag.hasMany(DiaryDateTag, { foreignKey: 'tagId', as: 'diaryDateTags' });
 DiaryDateTag.belongsTo(DiaryTag, { foreignKey: 'tagId', as: 'tag' });