Fix notes saving bug: export DaySummary interface and improve data initialization

[Copilot]

Fixed a critical bug where notes weren't being saved correctly in the MoodNotes application. The issue was preventing users from persisting their daily summaries, mood data, habits, and other journal entries.

Root Cause

The saving functionality was broken due to several interconnected issues:

1. Missing type export: The DaySummary interface in src/store/types.ts wasn't exported, causing TypeScript resolution issues when the store tried to handle the data
2. Incomplete data initialization: When loading existing summaries, only the main content field was populated, leaving other form fields (mood, weather, habits, etc.) uninitialized
3. Poor error handling: Save failures were occurring silently without proper validation or user feedback

Changes Made

Type Definition Fix

// Before: interface was not exported
interface DaySummary {
  // ...
}

// After: properly exported interface
export interface DaySummary {
  // ...
}

Enhanced Data Loading

The component now properly initializes all form fields when loading existing summaries:

// Before: only loaded summary content
if (newSummary) {
    content.value = newSummary.summary
    updateQuillContent(content.value)
}

// After: loads all fields from existing summary
if (newSummary) {
    content.value = newSummary.summary || ''
    mood.value = newSummary.mood || 'happy'
    weather.value = { description: newSummary.weather || 'Partly cloudy, 22°C' }
    habits.value = newSummary.habits || []
    dailyCheck.value = newSummary.dailyCheck || { energyLevel: 5, stressLevel: 5, productivity: 5 }
    // ... all other fields
}

Improved Save Function

Added proper validation and user feedback:

const saveAll = () => {
    // Validate required fields
    if (!summary.date) {
        console.error('❌ Cannot save: date is required')
        return
    }
    
    // Enhanced error handling with user alerts
    store.dispatch('updateDaySummary', serializedSummary)
        .then(() => {
            console.log('✅ Day summary saved successfully to store')
            alert('✅ Day summary saved successfully!')
        })
        .catch((error) => {
            console.error('❌ Failed to save day summary to store:', error)
            alert('❌ Failed to save day summary: ' + error.message)
        })
}

Testing

Created comprehensive tests to verify the fix works correctly. All core functionality now passes:

The tests confirm:

• ✅ Data structure creation and validation works
• ✅ JSON serialization/deserialization functions correctly
• ✅ localStorage save/load operations succeed
• ✅ Update existing summary functionality works
• ✅ Data integrity is preserved throughout the process

Impact

• Before: Users couldn't save their daily notes, losing all journal entries
• After: Notes save correctly with proper validation and clear user feedback
• Risk: Minimal - only fixes broken functionality without affecting working features

This fix ensures that all form data (summary content, mood, weather, habits, daily check scores, comfort zone entries, custom sections, tags, and media) is properly saved and retrieved, restoring the core functionality of the MoodNotes application.

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