Fix notes saving bug: export DaySummary interface and improve data initialization#1

Copilot wants to merge 2 commits intomainPStarH/MoodNotes:mainfrom

copilot/fix-9e2afcee-490b-40be-a610-a43c543f559cPStarH/MoodNotes:copilot/fix-9e2afcee-490b-40be-a610-a43c543f559cCopy head branch name to clipboard