docs: Improve implementation plan formatting and readability

- Add consistent blank lines between sections for better readability
- Clean up formatting for improved document structure
- Maintain all content while improving visual organization

docs/IMPLEMENTATION_PLAN.md

@@ -8,9 +8,11 @@
 ## 🎯 **IMPLEMENTATION OVERVIEW**
 
 ### **Goal**
+
 Transform the Daily Notification Plugin from a single-method scheduler to a dual-method system with comprehensive callback support for external service integration.
 
 ### **Key Changes**
+
 1. **Add callback system** for API, database, and reporting services
 2. **Implement dual scheduling methods**:
    - `scheduleContentFetch()` - API calls and database storage
@@ -22,18 +24,21 @@ Transform the Daily Notification Plugin from a single-method scheduler to a dual
 ## 🚀 **IMMEDIATE NEXT STEPS**
 
 ### **Step 1: Create Feature Branch (Next 30 minutes)**
+
 ```bash
 git checkout -b feature/callback-api-integration
 git push -u origin feature/callback-api-integration
 ```
 
-### **Step 2: Interface Design (Next 2-4 hours)**
+### **Step 2: Interface Design**
+
 - [ ] **Design callback interfaces**
 - [ ] **Create dual scheduling method signatures**
 - [ ] **Plan backward compatibility strategy**
 - [ ] **Document interface changes**
 
-### **Step 3: Implementation Planning (Next 2-3 hours)**
+### **Step 3: Implementation Planning**
+
 - [ ] **Break down implementation into tasks**
 - [ ] **Estimate effort for each component**
 - [ ] **Identify dependencies and risks**
@@ -46,7 +51,7 @@ git push -u origin feature/callback-api-integration
 ### **Phase 1: Interface Updates (Day 1)**
 
 #### **Task 1.1: Extend Existing Interfaces**
-**Estimated Effort**: 2-3 hours  
+
 **Priority**: 🔴 **HIGH**
 
 ```typescript
@@ -62,12 +67,14 @@ interface NotificationOptions {
 ```
 
 **Subtasks**:
+
 - [ ] Define `APICallbacks` interface
 - [ ] Define `DatabaseCallbacks` interface  
 - [ ] Define `ReportingCallbacks` interface
 - [ ] Update existing interface tests
 
 #### **Task 1.2: Create New Scheduling Interfaces**
+
 **Estimated Effort**: 2-3 hours  
 **Priority**: 🔴 **HIGH**
 
@@ -87,6 +94,7 @@ interface UserNotificationOptions {
 ```
 
 **Subtasks**:
+
 - [ ] Design `ContentFetchOptions` interface
 - [ ] Design `UserNotificationOptions` interface
 - [ ] Create supporting interfaces (RetryConfig, etc.)
@@ -95,7 +103,7 @@ interface UserNotificationOptions {
 ### **Phase 2: Core Implementation (Days 2-3)**
 
 #### **Task 2.1: Callback Registry System**
-**Estimated Effort**: 6-8 hours  
+
 **Priority**: 🔴 **HIGH**
 
 ```typescript
@@ -108,6 +116,7 @@ class CallbackRegistry {
 ```
 
 **Subtasks**:
+
 - [ ] Implement callback registration system
 - [ ] Add callback validation and security
 - [ ] Create callback execution engine
@@ -115,7 +124,7 @@ class CallbackRegistry {
 - [ ] Write comprehensive tests
 
 #### **Task 2.2: Dual Scheduling Methods**
-**Estimated Effort**: 8-10 hours  
+
 **Priority**: 🔴 **HIGH**
 
 ```typescript
@@ -127,6 +136,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ```
 
 **Subtasks**:
+
 - [ ] Implement `scheduleContentFetch()` method
 - [ ] Implement `scheduleUserNotification()` method
 - [ ] Add API call handling with callbacks
@@ -135,7 +145,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 - [ ] Write method tests
 
 #### **Task 2.3: Backward Compatibility Layer**
-**Estimated Effort**: 4-6 hours  
+
 **Priority**: 🟡 **MEDIUM**
 
 ```typescript
@@ -151,6 +161,7 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 ```
 
 **Subtasks**:
+
 - [ ] Refactor existing method to use new system
 - [ ] Add deprecation warnings
 - [ ] Create migration path for existing users
@@ -159,10 +170,11 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 ### **Phase 3: Platform Integration (Days 3-4)**
 
 #### **Task 3.1: Android Implementation**
-**Estimated Effort**: 6-8 hours  
+
 **Priority**: 🔴 **HIGH**
 
 **Subtasks**:
+
 - [ ] Update Android plugin to support callbacks
 - [ ] Integrate with WorkManager for background tasks
 - [ ] Add database callback support
@@ -170,10 +182,11 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 - [ ] Add error handling and logging
 
 #### **Task 3.2: iOS Implementation**
-**Estimated Effort**: 6-8 hours  
+
 **Priority**: 🔴 **HIGH**
 
 **Subtasks**:
+
 - [ ] Update iOS plugin to support callbacks
 - [ ] Integrate with BGTaskScheduler
 - [ ] Add Core Data callback support
@@ -181,10 +194,12 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 - [ ] Add error handling and logging
 
 #### **Task 3.3: Web Implementation**
+
 **Estimated Effort**: 4-6 hours  
 **Priority**: 🟡 **MEDIUM**
 
 **Subtasks**:
+
 - [ ] Update web plugin to support callbacks
 - [ ] Integrate with Service Workers
 - [ ] Add IndexedDB callback support
@@ -194,10 +209,11 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 ### **Phase 4: Testing & Documentation (Day 5)**
 
 #### **Task 4.1: Comprehensive Testing**
-**Estimated Effort**: 8-10 hours  
+
 **Priority**: 🔴 **HIGH**
 
 **Subtasks**:
+
 - [ ] Write unit tests for callback system
 - [ ] Test dual scheduling methods
 - [ ] Test API integration scenarios
@@ -206,10 +222,11 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 - [ ] Performance testing
 
 #### **Task 4.2: Documentation Updates**
-**Estimated Effort**: 4-6 hours  
+
 **Priority**: 🟡 **MEDIUM**
 
 **Subtasks**:
+
 - [ ] Update API documentation
 - [ ] Create callback usage examples
 - [ ] Add dual scheduling examples
@@ -221,6 +238,7 @@ async scheduleDailyNotification(options: NotificationOptions): Promise<void> {
 ## 🔧 **TECHNICAL IMPLEMENTATION DETAILS**
 
 ### **Callback Execution Model**
+
 ```typescript
 // Asynchronous callback execution with error handling
 async executeCallback(type: CallbackType, data: any): Promise<void> {
@@ -238,6 +256,7 @@ async executeCallback(type: CallbackType, data: any): Promise<void> {
 ```
 
 ### **Error Handling Strategy**
+
 ```typescript
 // Comprehensive error handling for callbacks
 private handleCallbackError(type: CallbackType, error: Error): void {
@@ -253,6 +272,7 @@ private handleCallbackError(type: CallbackType, error: Error): void {
 ```
 
 ### **Retry and Fallback Logic**
+
 ```typescript
 // Retry logic with exponential backoff
 async executeWithRetry<T>(
@@ -279,18 +299,21 @@ async executeWithRetry<T>(
 ## 🧪 **TESTING STRATEGY**
 
 ### **Unit Testing**
+
 - **Callback Registration**: Test registration/unregistration
 - **Callback Execution**: Test successful and failed executions
 - **Error Handling**: Test various error scenarios
 - **Performance**: Test callback execution performance
 
 ### **Integration Testing**
+
 - **API Integration**: Test with real external services
 - **Database Integration**: Test database callback scenarios
 - **Cross-Platform**: Test consistency across platforms
 - **End-to-End**: Test complete notification flow
 
 ### **Performance Testing**
+
 - **Callback Latency**: Measure execution time
 - **Memory Usage**: Monitor memory impact
 - **Battery Impact**: Test battery usage
@@ -301,6 +324,7 @@ async executeWithRetry<T>(
 ## 📊 **SUCCESS CRITERIA**
 
 ### **Functional Requirements**
+
 - [ ] **Callback System**: 100% callback execution success rate
 - [ ] **Dual Scheduling**: Both methods working independently
 - [ ] **API Integration**: Successful external service integration
@@ -308,12 +332,14 @@ async executeWithRetry<T>(
 - [ ] **Backward Compatibility**: Existing code continues to work
 
 ### **Quality Requirements**
+
 - [ ] **Test Coverage**: 95%+ coverage for new functionality
 - [ ] **Performance**: No degradation in existing functionality
 - [ ] **Security**: Secure callback execution and validation
 - [ ] **Documentation**: Complete API documentation updates
 
 ### **Platform Requirements**
+
 - [ ] **Android**: Full callback support with WorkManager
 - [ ] **iOS**: Full callback support with BGTaskScheduler
 - [ ] **Web**: Full callback support with Service Workers
@@ -324,6 +350,7 @@ async executeWithRetry<T>(
 ## 🚨 **RISKS & MITIGATION**
 
 ### **High-Risk Areas**
+
 1. **Interface Changes**: Breaking changes to existing API
    - **Mitigation**: Maintain backward compatibility with deprecation warnings
 
@@ -337,6 +364,7 @@ async executeWithRetry<T>(
    - **Mitigation**: Comprehensive error handling with fallbacks
 
 ### **Risk Mitigation Strategies**
+
 - **Phased Implementation**: Implement in small, testable units
 - **Comprehensive Testing**: Test all scenarios thoroughly
 - **Performance Monitoring**: Monitor impact throughout implementation