feat: notification number relo for groupByDate mode #144

Job	Run time
Prepare CI	1s
Lint App / biomejs	16s
Tests / Run Tests	3m 32s
Build / Build Linux (electron-builder)	4m 27s
Build / Build macOS (electron-builder)	2m 28s
Build / Build Windows (electron-builder)	2m 16s
	13m 0s

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