fix: Resolve TypeScript compilation errors and test environment issues

- Update interface definitions to match test requirements
- Add missing methods to DailyNotificationPlugin interface
- Fix ContentHandler signature compatibility
- Switch Jest test environment from node to jsdom
- Install required jsdom dependencies
- Update mock plugin objects with all required methods
- Fix timestamp type mismatches in tests

tests/advanced-scenarios.test.ts

@@ -13,6 +13,10 @@ describe('DailyNotification Advanced Scenarios', () => {
       cancelAllNotifications: jest.fn(),
       getNotificationStatus: jest.fn(),
       updateSettings: jest.fn(),
+      getBatteryStatus: jest.fn(),
+      requestBatteryOptimizationExemption: jest.fn(),
+      setAdaptiveScheduling: jest.fn(),
+      getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
     };

tests/daily-notification.test.ts

@@ -53,9 +53,10 @@ describe('DailyNotification Plugin', () => {
   describe('getLastNotification', () => {
     it('should return the last notification', async () => {
       const mockResponse: NotificationResponse = {
+        id: 'test-notification',
         title: 'Last Notification',
         body: 'This was the last notification',
-        timestamp: new Date().toISOString()
+        timestamp: Date.now()
       };
 
       const result = await DailyNotification.getLastNotification();

tests/edge-cases.test.ts

@@ -18,6 +18,10 @@ describe('DailyNotification Edge Cases', () => {
       cancelAllNotifications: jest.fn(),
       getNotificationStatus: jest.fn(),
       updateSettings: jest.fn(),
+      getBatteryStatus: jest.fn(),
+      requestBatteryOptimizationExemption: jest.fn(),
+      setAdaptiveScheduling: jest.fn(),
+      getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
     };

tests/enterprise-scenarios.test.ts

@@ -17,6 +17,10 @@ describe('DailyNotification Enterprise Scenarios', () => {
       cancelAllNotifications: jest.fn(),
       getNotificationStatus: jest.fn(),
       updateSettings: jest.fn(),
+      getBatteryStatus: jest.fn(),
+      requestBatteryOptimizationExemption: jest.fn(),
+      setAdaptiveScheduling: jest.fn(),
+      getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
     };