feat(ClubSettings): add country and state code fields for regional calendar data

- Introduced `countryCode` and `stateCode` fields in the Club model to support regional calendar data.
- Updated ClubSettings component to allow users to select their country and state, enhancing the configuration options for clubs.
- Enhanced the ClubService to handle normalization of country and state codes during updates.
- Added new routes and middleware to support the training cancellation feature and calendar integration in the backend.
- Updated frontend navigation to include a calendar link, improving user access to scheduling features.

backend/models/Club.js

@@ -30,6 +30,19 @@ const Club = sequelize.define('Club', {
     field: 'auto_fetch_rankings',
     comment: 'Enable automatic TTR/QTTR rankings fetch for this club'
   },
+  countryCode: {
+    type: DataTypes.STRING(2),
+    allowNull: false,
+    defaultValue: 'DE',
+    field: 'country_code',
+    comment: 'ISO 3166-1 alpha-2 country code for regional calendar data'
+  },
+  stateCode: {
+    type: DataTypes.STRING(16),
+    allowNull: true,
+    field: 'state_code',
+    comment: 'ISO 3166-2 subdivision code for regional calendar data, e.g. DE-NW'
+  },
   memberDataQualityRequirements: {
     type: DataTypes.JSON,
     allowNull: true,

backend/models/TrainingCancellation.js

@@ -0,0 +1,51 @@
+import { DataTypes } from 'sequelize';
+import sequelize from '../database.js';
+import Club from './Club.js';
+
+const TrainingCancellation = sequelize.define('TrainingCancellation', {
+  id: {
+    type: DataTypes.INTEGER,
+    primaryKey: true,
+    autoIncrement: true,
+    allowNull: false,
+  },
+  clubId: {
+    type: DataTypes.INTEGER,
+    allowNull: false,
+    references: {
+      model: Club,
+      key: 'id',
+    },
+    onDelete: 'CASCADE',
+  },
+  startDate: {
+    type: DataTypes.DATEONLY,
+    allowNull: false,
+    field: 'start_date',
+  },
+  endDate: {
+    type: DataTypes.DATEONLY,
+    allowNull: false,
+    field: 'end_date',
+  },
+  date: {
+    type: DataTypes.DATEONLY,
+    allowNull: true,
+  },
+  reason: {
+    type: DataTypes.STRING(255),
+    allowNull: true,
+  },
+}, {
+  tableName: 'training_cancellations',
+  underscored: true,
+  timestamps: true,
+  indexes: [
+    {
+      unique: true,
+      fields: ['club_id', 'start_date', 'end_date'],
+    },
+  ],
+});
+
+export default TrainingCancellation;

backend/models/index.js

@@ -58,6 +58,7 @@ import TrainingGroup from './TrainingGroup.js';
 import MemberTrainingGroup from './MemberTrainingGroup.js';
 import ClubDisabledPresetGroup from './ClubDisabledPresetGroup.js';
 import TrainingTime from './TrainingTime.js';
+import TrainingCancellation from './TrainingCancellation.js';
 import BillingTemplate from './BillingTemplate.js';
 import BillingTemplateField from './BillingTemplateField.js';
 import BillingRun from './BillingRun.js';
@@ -407,6 +408,8 @@ ClubDisabledPresetGroup.belongsTo(Club, { foreignKey: 'clubId', as: 'club' });
 // Training Times
 TrainingGroup.hasMany(TrainingTime, { foreignKey: 'trainingGroupId', as: 'trainingTimes' });
 TrainingTime.belongsTo(TrainingGroup, { foreignKey: 'trainingGroupId', as: 'trainingGroup' });
+Club.hasMany(TrainingCancellation, { foreignKey: 'clubId', as: 'trainingCancellations' });
+TrainingCancellation.belongsTo(Club, { foreignKey: 'clubId', as: 'club' });
 
 // Billing
 Club.hasMany(BillingTemplate, { foreignKey: 'clubId', as: 'billingTemplates' });
@@ -484,6 +487,7 @@ export {
     MemberTrainingGroup,
     ClubDisabledPresetGroup,
     TrainingTime,
+    TrainingCancellation,
     BillingTemplate,
     BillingTemplateField,
     BillingRun,