feat: notification number relo for groupByDate mode #143

Job	Run time
Prepare CI	1s
Lint App / biomejs	17s
Tests / Run Tests	3m 4s
Build / Build Linux (electron-builder)	4m 3s
Build / Build macOS (electron-builder)	3m 27s
Build / Build Windows (electron-builder)	2m 6s
	12m 58s

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