Swift `import PhotosUI` made the compiler happy but the binary never
referenced any PhotosUI symbol directly — `presentLimitedLibraryPicker`
is dispatched via `objc_msgSend` against an Obj-C category on
`PHPhotoLibrary`. Without an explicit framework link the linker
dropped PhotosUI, the category never registered, and iOS 26 raised
NSInvalidArgumentException for an "unrecognized selector".
Declare Photos + PhotosUI as podspec frameworks so the linker force-
loads them.
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