refactor(api): use fragments for nested types #2083

Job	Run time
Prepare CI	2s
Lint App / biomejs	17s
Tests / Run Tests	1m 58s
Tests / SonarQube Cloud Analysis	1m 12s
Build / Build Linux (electron-builder)	4m 3s
Build / Build Windows (electron-builder)	2m 45s
Build / Build macOS (electron-builder)	4m 24s
	14m 41s

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