# Vue3 Notification Implementation Guide

**Author**: Matthew Raymer  
**Date**: October 20, 2025  
**Version**: 1.0.0  
**Status**: Implementation Planning

## Overview

This document provides a comprehensive guide for implementing scheduled local notifications and API-based change detection in the Vue3 example app using the DailyNotification plugin. It covers both basic notification scheduling and advanced TimeSafari API integration.

## Table of Contents

1. [Current Plugin Capabilities](#current-plugin-capabilities)
2. [Implementation Strategy](#implementation-strategy)
3. [Architecture Design](#architecture-design)
4. [Implementation Workflow](#implementation-workflow)
5. [UI/UX Considerations](#uiux-considerations)
6. [Technical Considerations](#technical-considerations)
7. [Success Metrics](#success-metrics)
8. [Code Examples](#code-examples)
9. [Testing Strategy](#testing-strategy)
10. [Deployment Checklist](#deployment-checklist)

## Current Plugin Capabilities

### Available Scheduling Methods

The `DailyNotification` plugin provides several key methods for scheduling:

#### 1. Basic Scheduling Methods
- `scheduleDailyNotification(options)` - Simple daily notifications
- `scheduleDailyReminder(options)` - More advanced reminder system
- `scheduleContentFetch(config)` - Background content fetching
- `scheduleUserNotification(config)` - User-facing notifications
- `scheduleDualNotification(config)` - Combined content fetch + user notification

#### 2. Available Parameters

**Basic Notification Options:**
```typescript
interface BasicNotificationOptions {
  time: string;           // HH:mm format (e.g., "09:00")
  title: string;         // Notification title
  body: string;          // Notification message
  sound?: boolean;       // Enable sound (default: true)
  priority?: string;    // Priority level (default: "default")
  url?: string;          // Optional deep link
}
```

**Advanced Reminder Options:**
```typescript
interface AdvancedReminderOptions {
  id: string;            // Unique reminder identifier
  title: string;         // Reminder title
  body: string;          // Reminder message
  time: string;          // HH:mm format
  sound?: boolean;        // Enable sound (default: true)
  vibration?: boolean;   // Enable vibration (default: true)
  priority?: string;     // Priority level (default: "normal")
  repeatDaily?: boolean; // Repeat daily (default: true)
  timezone?: string;     // Timezone (default: "UTC")
}
```

## Implementation Strategy

### Phase 1: Basic Scheduled Local Notifications

#### 1.1 Enhance ScheduleView.vue

**Current State:**
```typescript
// Current TODO in ScheduleView.vue line 55:
// TODO: call plugin
```

**Implementation:**
```typescript
async scheduleNotification() {
  this.isScheduling = true
  try {
    const { DailyNotification } = await import('@timesafari/daily-notification-plugin')
    
    await DailyNotification.scheduleDailyNotification({
      time: this.scheduleTime,
      title: this.notificationTitle,
      body: this.notificationMessage,
      sound: true,
      priority: "default"
    })
    
    // Show success message
    this.showSuccessMessage('Notification scheduled successfully!')
  } catch (error) {
    console.error('Failed to schedule notification:', error)
    this.showErrorMessage('Failed to schedule notification: ' + error.message)
  } finally {
    this.isScheduling = false
  }
}
```

#### 1.2 Create Reminder Management System

**New Component: ReminderManager.vue**
```typescript
interface Reminder {
  id: string
  title: string
  body: string
  time: string
  enabled: boolean
  lastTriggered?: number
  createdAt: number
  updatedAt: number
}

// Methods for managing reminders:
- scheduleReminder(reminder: Reminder)
- cancelReminder(id: string)
- updateReminder(id: string, updates: Partial<Reminder>)
- getScheduledReminders()
- toggleReminder(id: string, enabled: boolean)
```

### Phase 2: API-Based Change Detection

#### 2.1 TimeSafari Integration Service

**New Service: TimeSafariApiService.ts**
```typescript
class TimeSafariApiService {
  private integrationService: TimeSafariIntegrationService
  private activeDid: string = ''
  private apiServer: string = 'https://endorser.ch'
  
  async initialize(activeDid: string, apiServer: string) {
    this.activeDid = activeDid
    this.apiServer = apiServer
    
    this.integrationService = TimeSafariIntegrationService.getInstance()
    await this.integrationService.initialize({
      activeDid,
      storageAdapter: this.getStorageAdapter(),
      endorserApiBaseUrl: apiServer,
      starredProjectsConfig: {
        enabled: true,
        starredPlanHandleIds: [],
        lastAckedJwtId: '',
        fetchInterval: '0 8 * * *' // Daily at 8 AM
      }
    })
  }
  
  async checkForChanges(): Promise<ChangeNotification[]> {
    try {
      const changes = await this.integrationService.getStarredProjectsWithChanges(
        this.activeDid,
        this.starredPlanHandleIds,
        this.lastAckedJwtId
      )
      
      return this.mapToChangeNotifications(changes)
    } catch (error) {
      console.error('Failed to check for changes:', error)
      return []
    }
  }
  
  private mapToChangeNotifications(changes: any): ChangeNotification[] {
    // Map API response to change notifications
    return changes.data.map((change: any) => ({
      id: change.id,
      type: this.determineChangeType(change),
      title: change.title || 'Project Update',
      message: change.description || 'A project you follow has been updated',
      timestamp: Date.now(),
      actionUrl: change.url
    }))
  }
}
```

#### 2.2 Change Detection Workflow

**Change Notification Interface:**
```typescript
interface ChangeNotification {
  id: string
  type: 'offer' | 'project_update' | 'new_plan' | 'status_change'
  title: string
  message: string
  timestamp: number
  actionUrl?: string
  read: boolean
  dismissed: boolean
}
```

**Implementation in HomeView.vue:**
```typescript
async checkForApiChanges() {
  try {
    const changes = await this.timeSafariService.checkForChanges()
    
    if (changes.length > 0) {
      // Show notification for each change
      for (const change of changes) {
        await this.showChangeNotification(change)
      }
      
      // Update UI
      this.updateChangeIndicator(changes.length)
      
      // Store changes for history
      this.storeChangeHistory(changes)
    }
  } catch (error) {
    console.error('Failed to check for changes:', error)
    this.showErrorMessage('Failed to check for changes')
  }
}

async showChangeNotification(change: ChangeNotification) {
  try {
    await DailyNotification.scheduleUserNotification({
      schedule: 'immediate',
      title: change.title,
      body: change.message,
      actions: [
        { id: 'view', title: 'View' },
        { id: 'dismiss', title: 'Dismiss' }
      ]
    })
  } catch (error) {
    console.error('Failed to show change notification:', error)
  }
}
```

## Architecture Design

### Service Layer Structure

```
src/services/
├── NotificationService.ts      // Basic notification management
├── TimeSafariApiService.ts     // API integration
├── ChangeDetectionService.ts   // Change detection logic
├── ReminderService.ts          // Reminder management
└── StorageService.ts           // Local storage management
```

### Vue Components Enhancement

```
src/views/
├── ScheduleView.vue           // Enhanced with plugin integration
├── NotificationsView.vue      // Full notification management
├── ChangeDetectionView.vue    // New: API change monitoring
├── ReminderManagerView.vue    // New: Reminder management
└── ChangeHistoryView.vue      // New: Change history display
```

### Store Integration

**Enhanced App Store:**
```typescript
interface AppState {
  // Existing properties
  isLoading: boolean
  errorMessage: string | null
  platform: string
  isNative: boolean
  notificationStatus: NotificationStatus | null
  
  // New properties for notifications
  scheduledReminders: Reminder[]
  pendingChanges: ChangeNotification[]
  changeHistory: ChangeNotification[]
  apiConnectionStatus: 'connected' | 'disconnected' | 'error'
  lastChangeCheck: number
  notificationPreferences: NotificationPreferences
}

interface NotificationPreferences {
  enableScheduledReminders: boolean
  enableChangeNotifications: boolean
  enableSystemNotifications: boolean
  quietHoursStart: string
  quietHoursEnd: string
  preferredNotificationTimes: string[]
  changeTypes: string[]
}
```

## Implementation Workflow

### Step 1: Basic Notification Scheduling

1. **Enhance ScheduleView.vue**
   - Implement the TODO with plugin calls
   - Add form validation for time format and required fields
   - Add success/error message handling
   - Test scheduling functionality

2. **Add Error Handling**
   - Show user-friendly error messages
   - Handle permission denials gracefully
   - Provide fallback options when plugin unavailable

3. **Add Validation**
   - Ensure time format is HH:mm
   - Validate required fields (title, body, time)
   - Check for duplicate reminders

4. **Test Scheduling**
   - Verify notifications appear at scheduled times
   - Test on both Android and iOS platforms
   - Verify notification content and actions

### Step 2: Reminder Management

1. **Create ReminderService**
   - Implement CRUD operations for reminders
   - Add persistence using app store
   - Handle reminder state management

2. **Build ReminderManagerView**
   - Create UI for managing reminders
   - Add reminder creation/editing forms
   - Implement reminder list with actions

3. **Add Persistence**
   - Store reminders in app store
   - Add localStorage backup
   - Handle data migration

4. **Implement Cancellation**
   - Allow users to cancel/modify reminders
   - Handle reminder updates
   - Add bulk operations

### Step 3: API Integration

1. **Create TimeSafariApiService**
   - Implement API communication
   - Handle authentication (JWT/DID)
   - Add error handling and retry logic

2. **Implement Change Detection**
   - Poll for changes at configurable intervals
   - Handle different change types
   - Implement change filtering

3. **Add Change Notifications**
   - Show notifications when changes detected
   - Handle notification actions
   - Track notification engagement

4. **Add Change History**
   - Store change history
   - Provide history viewing interface
   - Implement change management (mark as read, dismiss)

### Step 4: Advanced Features

1. **Background Sync**
   - Use plugin's background fetching capabilities
   - Implement efficient polling strategies
   - Handle offline scenarios

2. **Smart Scheduling**
   - Adapt to user behavior patterns
   - Implement intelligent notification timing
   - Add user preference learning

3. **Change Filtering**
   - Allow users to filter change types
   - Implement notification preferences
   - Add quiet hours functionality

4. **Analytics**
   - Track notification effectiveness
   - Monitor user engagement
   - Collect performance metrics

## UI/UX Considerations

### Notification Types

1. **Scheduled Reminders**
   - User-initiated, recurring notifications
   - Customizable timing and content
   - User-controlled enable/disable

2. **Change Notifications**
   - API-triggered, immediate notifications
   - Contextual information and actions
   - Batch handling for multiple changes

3. **System Notifications**
   - Plugin status updates
   - Error notifications
   - Permission requests

### User Controls

1. **Enable/Disable Options**
   - Toggle different notification types
   - Granular control over notification sources
   - Quick enable/disable for all notifications

2. **Time Preferences**
   - Set preferred notification times
   - Configure quiet hours
   - Timezone handling

3. **Change Filters**
   - Choose which changes to be notified about
   - Filter by change type or source
   - Set notification frequency limits

4. **Visual Customization**
   - Custom notification sounds
   - Vibration patterns
   - Notification appearance options

### Visual Indicators

1. **Badge Counts**
   - Show pending changes count
   - Display unread notifications
   - Update in real-time

2. **Status Indicators**
   - API connection status
   - Plugin availability status
   - Last sync time

3. **History Views**
   - Show past notifications
   - Display change history
   - Provide search and filtering

## Technical Considerations

### Plugin Integration Points

1. **Permission Handling**
   - Request notification permissions on app start
   - Handle permission denials gracefully
   - Provide permission request retry mechanisms

2. **Platform Differences**
   - Handle Android/iOS notification differences
   - Adapt to platform-specific limitations
   - Test on multiple device types

3. **Error Recovery**
   - Handle plugin failures gracefully
   - Implement fallback notification methods
   - Provide user feedback on errors

4. **Background Execution**
   - Ensure background tasks work correctly
   - Handle app lifecycle events
   - Test background notification delivery

### API Integration Challenges

1. **Authentication**
   - Handle JWT/DID authentication
   - Manage token refresh
   - Handle authentication failures

2. **Rate Limiting**
   - Respect API rate limits
   - Implement exponential backoff
   - Handle rate limit exceeded errors

3. **Offline Handling**
   - Cache changes when offline
   - Sync when connection restored
   - Handle offline notification scenarios

4. **Error Handling**
   - Graceful degradation on API failures
   - Retry mechanisms for transient errors
   - User feedback for persistent errors

### Performance Optimization

1. **Efficient Polling**
   - Minimize API calls while maintaining responsiveness
   - Implement smart polling intervals
   - Use push notifications when available

2. **Caching**
   - Cache API responses appropriately
   - Implement cache invalidation strategies
   - Handle cache size limits

3. **Background Processing**
   - Use plugin's background capabilities
   - Minimize foreground processing
   - Optimize for battery life

4. **Memory Management**
   - Clean up old notifications/changes
   - Implement data retention policies
   - Monitor memory usage

## Success Metrics

### Notification Reliability

1. **Delivery Rate**
   - Percentage of notifications delivered successfully
   - Track delivery failures and reasons
   - Monitor platform-specific delivery rates

2. **Timing Accuracy**
   - How close notifications appear to scheduled time
   - Track timing variations across platforms
   - Monitor system clock accuracy impact

3. **User Engagement**
   - Click-through rates on notifications
   - User interaction with notification actions
   - Notification dismissal patterns

### Change Detection Effectiveness

1. **Detection Speed**
   - Time from change occurrence to notification
   - API response time monitoring
   - Background processing efficiency

2. **False Positives**
   - Unwanted or irrelevant notifications
   - User feedback on notification relevance
   - Filter effectiveness

3. **User Satisfaction**
   - User feedback on notification usefulness
   - Preference setting usage
   - Notification frequency satisfaction

### System Performance

1. **API Efficiency**
   - Minimal API calls for maximum coverage
   - Request/response size optimization
   - Network usage monitoring

2. **Battery Impact**
   - Battery drain from background processing
   - Notification frequency impact
   - Platform-specific optimization

3. **Storage Usage**
   - Efficient data storage
   - Cache size management
   - Data retention policy effectiveness

## Code Examples

### Complete ScheduleView.vue Implementation

```vue
<template>
  <div class="schedule-view">
    <div class="view-header">
      <h1 class="page-title">📅 Schedule Notification</h1>
      <p class="page-subtitle">Schedule a new daily notification</p>
    </div>
    
    <div class="schedule-form">
      <div class="form-group">
        <label class="form-label">Notification Time</label>
        <input 
          type="time" 
          class="form-input" 
          v-model="scheduleTime"
          :class="{ 'error': timeError }"
        />
        <div v-if="timeError" class="error-message">{{ timeError }}</div>
      </div>
      
      <div class="form-group">
        <label class="form-label">Title</label>
        <input 
          type="text" 
          class="form-input" 
          v-model="notificationTitle" 
          placeholder="Daily Update"
          :class="{ 'error': titleError }"
        />
        <div v-if="titleError" class="error-message">{{ titleError }}</div>
      </div>
      
      <div class="form-group">
        <label class="form-label">Message</label>
        <textarea 
          class="form-textarea" 
          v-model="notificationMessage" 
          placeholder="Your daily notification message"
          :class="{ 'error': messageError }"
        ></textarea>
        <div v-if="messageError" class="error-message">{{ messageError }}</div>
      </div>
      
      <div class="form-group">
        <label class="form-label">
          <input type="checkbox" v-model="enableSound" />
          Enable Sound
        </label>
      </div>
      
      <div class="form-group">
        <label class="form-label">
          <input type="checkbox" v-model="repeatDaily" />
          Repeat Daily
        </label>
      </div>
      
      <div class="form-actions">
        <button 
          class="action-button primary" 
          @click="scheduleNotification" 
          :disabled="isScheduling || !isFormValid"
        >
          {{ isScheduling ? 'Scheduling...' : 'Schedule Notification' }}
        </button>
      </div>
      
      <div v-if="successMessage" class="success-message">
        {{ successMessage }}
      </div>
      
      <div v-if="errorMessage" class="error-message">
        {{ errorMessage }}
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, computed, onMounted } from 'vue'
import { useAppStore } from '@/stores/app'

const appStore = useAppStore()

// Form data
const scheduleTime = ref('09:00')
const notificationTitle = ref('Daily Update')
const notificationMessage = ref('Your daily notification is ready!')
const enableSound = ref(true)
const repeatDaily = ref(true)

// State
const isScheduling = ref(false)
const successMessage = ref('')
const errorMessage = ref('')

// Validation
const timeError = ref('')
const titleError = ref('')
const messageError = ref('')

// Computed
const isFormValid = computed(() => {
  return scheduleTime.value && 
         notificationTitle.value.trim() && 
         notificationMessage.value.trim() &&
         !timeError.value &&
         !titleError.value &&
         !messageError.value
})

// Methods
const validateForm = () => {
  timeError.value = ''
  titleError.value = ''
  messageError.value = ''
  
  // Validate time format
  if (!scheduleTime.value) {
    timeError.value = 'Time is required'
  } else if (!/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/.test(scheduleTime.value)) {
    timeError.value = 'Invalid time format. Use HH:MM'
  }
  
  // Validate title
  if (!notificationTitle.value.trim()) {
    titleError.value = 'Title is required'
  } else if (notificationTitle.value.trim().length > 100) {
    titleError.value = 'Title must be less than 100 characters'
  }
  
  // Validate message
  if (!notificationMessage.value.trim()) {
    messageError.value = 'Message is required'
  } else if (notificationMessage.value.trim().length > 500) {
    messageError.value = 'Message must be less than 500 characters'
  }
}

const clearMessages = () => {
  successMessage.value = ''
  errorMessage.value = ''
}

const scheduleNotification = async () => {
  validateForm()
  
  if (!isFormValid.value) {
    return
  }
  
  isScheduling.value = true
  clearMessages()
  
  try {
    const { DailyNotification } = await import('@timesafari/daily-notification-plugin')
    
    // Check if plugin is available
    if (!DailyNotification) {
      throw new Error('DailyNotification plugin not available')
    }
    
    // Schedule the notification
    await DailyNotification.scheduleDailyNotification({
      time: scheduleTime.value,
      title: notificationTitle.value.trim(),
      body: notificationMessage.value.trim(),
      sound: enableSound.value,
      priority: "default"
    })
    
    successMessage.value = 'Notification scheduled successfully!'
    
    // Reset form
    scheduleTime.value = '09:00'
    notificationTitle.value = 'Daily Update'
    notificationMessage.value = 'Your daily notification is ready!'
    
  } catch (error) {
    console.error('Failed to schedule notification:', error)
    errorMessage.value = `Failed to schedule notification: ${error.message}`
  } finally {
    isScheduling.value = false
  }
}

// Watch for form changes to clear messages
watch([scheduleTime, notificationTitle, notificationMessage], () => {
  clearMessages()
})

onMounted(() => {
  // Check if notifications are available
  if (!appStore.isNotificationReady) {
    errorMessage.value = 'Notifications are not available. Please check your settings.'
  }
})
</script>

<style scoped>
/* ... existing styles ... */

.error-message {
  color: #f44336;
  font-size: 12px;
  margin-top: 4px;
}

.success-message {
  color: #4caf50;
  font-size: 14px;
  margin-top: 16px;
  padding: 8px;
  background: rgba(76, 175, 80, 0.1);
  border-radius: 4px;
}

.form-input.error,
.form-textarea.error {
  border-color: #f44336;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 8px;
}
</style>
```

### TimeSafariApiService Implementation

```typescript
/**
 * TimeSafari API Service
 * 
 * Handles integration with TimeSafari API for change detection
 * and notification management.
 * 
 * @author Matthew Raymer
 * @version 1.0.0
 */

import { TimeSafariIntegrationService } from '@timesafari/daily-notification-plugin'

export interface ChangeNotification {
  id: string
  type: 'offer' | 'project_update' | 'new_plan' | 'status_change'
  title: string
  message: string
  timestamp: number
  actionUrl?: string
  read: boolean
  dismissed: boolean
}

export interface TimeSafariConfig {
  activeDid: string
  apiServer: string
  starredPlanHandleIds: string[]
  lastAckedJwtId: string
  pollingInterval: number
}

export class TimeSafariApiService {
  private integrationService: TimeSafariIntegrationService | null = null
  private config: TimeSafariConfig | null = null
  private pollingTimer: NodeJS.Timeout | null = null
  private isPolling = false
  
  async initialize(config: TimeSafariConfig): Promise<void> {
    try {
      this.config = config
      
      this.integrationService = TimeSafariIntegrationService.getInstance()
      await this.integrationService.initialize({
        activeDid: config.activeDid,
        storageAdapter: this.getStorageAdapter(),
        endorserApiBaseUrl: config.apiServer,
        starredProjectsConfig: {
          enabled: true,
          starredPlanHandleIds: config.starredPlanHandleIds,
          lastAckedJwtId: config.lastAckedJwtId,
          fetchInterval: '0 8 * * *' // Daily at 8 AM
        }
      })
      
      console.log('TimeSafari API Service initialized successfully')
    } catch (error) {
      console.error('Failed to initialize TimeSafari API Service:', error)
      throw error
    }
  }
  
  async checkForChanges(): Promise<ChangeNotification[]> {
    if (!this.integrationService || !this.config) {
      throw new Error('Service not initialized')
    }
    
    try {
      const changes = await this.integrationService.getStarredProjectsWithChanges(
        this.config.activeDid,
        this.config.starredPlanHandleIds,
        this.config.lastAckedJwtId
      )
      
      return this.mapToChangeNotifications(changes)
    } catch (error) {
      console.error('Failed to check for changes:', error)
      return []
    }
  }
  
  startPolling(callback: (changes: ChangeNotification[]) => void): void {
    if (this.isPolling) {
      return
    }
    
    this.isPolling = true
    
    const poll = async () => {
      try {
        const changes = await this.checkForChanges()
        if (changes.length > 0) {
          callback(changes)
        }
      } catch (error) {
        console.error('Polling error:', error)
      }
    }
    
    // Initial poll
    poll()
    
    // Set up interval
    this.pollingTimer = setInterval(poll, this.config?.pollingInterval || 300000) // 5 minutes default
  }
  
  stopPolling(): void {
    if (this.pollingTimer) {
      clearInterval(this.pollingTimer)
      this.pollingTimer = null
    }
    this.isPolling = false
  }
  
  private mapToChangeNotifications(changes: any): ChangeNotification[] {
    if (!changes.data || !Array.isArray(changes.data)) {
      return []
    }
    
    return changes.data.map((change: any) => ({
      id: change.id || `change_${Date.now()}_${Math.random()}`,
      type: this.determineChangeType(change),
      title: change.title || 'Project Update',
      message: change.description || 'A project you follow has been updated',
      timestamp: Date.now(),
      actionUrl: change.url,
      read: false,
      dismissed: false
    }))
  }
  
  private determineChangeType(change: any): ChangeNotification['type'] {
    if (change.type) {
      return change.type
    }
    
    // Determine type based on content
    if (change.title?.toLowerCase().includes('offer')) {
      return 'offer'
    } else if (change.title?.toLowerCase().includes('project')) {
      return 'project_update'
    } else if (change.title?.toLowerCase().includes('new')) {
      return 'new_plan'
    } else {
      return 'status_change'
    }
  }
  
  private getStorageAdapter(): any {
    // Return appropriate storage adapter
    return {
      store: (key: string, value: any, ttl?: number) => {
        // Implementation depends on platform
        if (typeof localStorage !== 'undefined') {
          localStorage.setItem(key, JSON.stringify({ value, ttl, timestamp: Date.now() }))
        }
      },
      retrieve: (key: string) => {
        if (typeof localStorage !== 'undefined') {
          const item = localStorage.getItem(key)
          if (item) {
            const { value, ttl, timestamp } = JSON.parse(item)
            if (ttl && Date.now() - timestamp > ttl) {
              localStorage.removeItem(key)
              return null
            }
            return value
          }
        }
        return null
      }
    }
  }
}

export default TimeSafariApiService
```

## Testing Strategy

### Unit Tests

1. **Service Layer Testing**
   - Test notification scheduling logic
   - Test API integration methods
   - Test error handling scenarios

2. **Component Testing**
   - Test form validation
   - Test user interactions
   - Test state management

3. **Plugin Integration Testing**
   - Test plugin method calls
   - Test permission handling
   - Test platform differences

### Integration Tests

1. **End-to-End Notification Flow**
   - Test complete notification scheduling
   - Test notification delivery
   - Test user interactions

2. **API Integration Flow**
   - Test change detection
   - Test notification triggering
   - Test error scenarios

3. **Cross-Platform Testing**
   - Test on Android devices
   - Test on iOS devices
   - Test on web browsers

### Manual Testing

1. **Device Testing**
   - Test on various Android versions
   - Test on various iOS versions
   - Test on different screen sizes

2. **Network Testing**
   - Test with poor connectivity
   - Test offline scenarios
   - Test API failures

3. **User Experience Testing**
   - Test notification timing
   - Test user interface responsiveness
   - Test error message clarity

## Deployment Checklist

### Pre-Deployment

- [ ] All unit tests passing
- [ ] Integration tests passing
- [ ] Manual testing completed
- [ ] Code review completed
- [ ] Documentation updated
- [ ] Performance testing completed

### Deployment Steps

1. **Build Process**
   - [ ] Run `npm run build`
   - [ ] Run `npx cap sync android`
   - [ ] Run fix script for capacitor.plugins.json
   - [ ] Verify plugin registration

2. **Testing**
   - [ ] Test on Android device
   - [ ] Test notification scheduling
   - [ ] Test API integration
   - [ ] Test error handling

3. **Monitoring**
   - [ ] Monitor notification delivery rates
   - [ ] Monitor API response times
   - [ ] Monitor error rates
   - [ ] Monitor user feedback

### Post-Deployment

- [ ] Monitor system performance
- [ ] Collect user feedback
- [ ] Track success metrics
- [ ] Plan future improvements

## Conclusion

This implementation guide provides a comprehensive roadmap for adding scheduled local notifications and API-based change detection to the Vue3 example app. The approach leverages the existing DailyNotification plugin capabilities while building a robust, user-friendly notification system.

Key benefits of this implementation:

1. **Native-First Approach**: Uses platform-specific notification systems for reliable delivery
2. **Offline-First Design**: Works even when the app is closed or offline
3. **User-Controlled**: Provides granular control over notification preferences
4. **Scalable Architecture**: Supports future enhancements and additional notification types
5. **Cross-Platform**: Works consistently across Android, iOS, and web platforms

The implementation follows the TimeSafari development principles of learning through implementation, designing for failure, and measuring everything to ensure a robust and reliable notification system.