feat: Implement dual scheduling API design and interfaces

- Add comprehensive dual scheduling interfaces to definitions.ts
- Implement ContentFetchConfig, UserNotificationConfig, and DualScheduleConfiguration
- Add new plugin methods for dual scheduling, content management, and callbacks
- Update web implementations with mock functionality for all new methods
- Fix all test files to include new dual scheduling method mocks
- Ensure TypeScript compilation and all tests pass successfully

Resolves: Plugin API design for dual scheduling system implementation

tests/advanced-scenarios.test.ts

@@ -19,6 +19,26 @@ describe('DailyNotification Advanced Scenarios', () => {
       getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
+      
+      // Dual scheduling methods
+      scheduleContentFetch: jest.fn(),
+      scheduleUserNotification: jest.fn(),
+      scheduleDualNotification: jest.fn(),
+      getDualScheduleStatus: jest.fn(),
+      updateDualScheduleConfig: jest.fn(),
+      cancelDualSchedule: jest.fn(),
+      pauseDualSchedule: jest.fn(),
+      resumeDualSchedule: jest.fn(),
+      
+      // Content management methods
+      getContentCache: jest.fn(),
+      clearContentCache: jest.fn(),
+      getContentHistory: jest.fn(),
+      
+      // Callback management methods
+      registerCallback: jest.fn(),
+      unregisterCallback: jest.fn(),
+      getRegisteredCallbacks: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });

tests/daily-notification.test.ts

@@ -33,6 +33,26 @@ describe('DailyNotification Plugin', () => {
       getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
+      
+      // Dual scheduling methods
+      scheduleContentFetch: jest.fn(),
+      scheduleUserNotification: jest.fn(),
+      scheduleDualNotification: jest.fn(),
+      getDualScheduleStatus: jest.fn(),
+      updateDualScheduleConfig: jest.fn(),
+      cancelDualSchedule: jest.fn(),
+      pauseDualSchedule: jest.fn(),
+      resumeDualSchedule: jest.fn(),
+      
+      // Content management methods
+      getContentCache: jest.fn(),
+      clearContentCache: jest.fn(),
+      getContentHistory: jest.fn(),
+      
+      // Callback management methods
+      registerCallback: jest.fn(),
+      unregisterCallback: jest.fn(),
+      getRegisteredCallbacks: jest.fn(),
     };
 
     // Create plugin instance with mock

tests/edge-cases.test.ts

@@ -24,6 +24,26 @@ describe('DailyNotification Edge Cases', () => {
       getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
+      
+      // Dual scheduling methods
+      scheduleContentFetch: jest.fn(),
+      scheduleUserNotification: jest.fn(),
+      scheduleDualNotification: jest.fn(),
+      getDualScheduleStatus: jest.fn(),
+      updateDualScheduleConfig: jest.fn(),
+      cancelDualSchedule: jest.fn(),
+      pauseDualSchedule: jest.fn(),
+      resumeDualSchedule: jest.fn(),
+      
+      // Content management methods
+      getContentCache: jest.fn(),
+      clearContentCache: jest.fn(),
+      getContentHistory: jest.fn(),
+      
+      // Callback management methods
+      registerCallback: jest.fn(),
+      unregisterCallback: jest.fn(),
+      getRegisteredCallbacks: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });

tests/enterprise-scenarios.test.ts

@@ -23,6 +23,26 @@ describe('DailyNotification Enterprise Scenarios', () => {
       getPowerState: jest.fn(),
       checkPermissions: jest.fn(),
       requestPermissions: jest.fn(),
+      
+      // Dual scheduling methods
+      scheduleContentFetch: jest.fn(),
+      scheduleUserNotification: jest.fn(),
+      scheduleDualNotification: jest.fn(),
+      getDualScheduleStatus: jest.fn(),
+      updateDualScheduleConfig: jest.fn(),
+      cancelDualSchedule: jest.fn(),
+      pauseDualSchedule: jest.fn(),
+      resumeDualSchedule: jest.fn(),
+      
+      // Content management methods
+      getContentCache: jest.fn(),
+      clearContentCache: jest.fn(),
+      getContentHistory: jest.fn(),
+      
+      // Callback management methods
+      registerCallback: jest.fn(),
+      unregisterCallback: jest.fn(),
+      getRegisteredCallbacks: jest.fn(),
     };
     plugin = new DailyNotification(mockPlugin);
   });