Timed links arrive wrapped as yattee://open?url=... from the share
extension, but the timestamp was parsed from the wrapper URL, where a
single-? form like youtu.be/ID?t=N hides t inside the url query item.
With no startTime the player fell back to saved watch progress.
- Add URLRouter.unwrapped(_:) resolving the wrapper to the inner URL
(raw remainder after ?url=, since the share extension does not encode
& and URLComponents would drop &t= parts) and use it in handleDeepLink
- Thread forceStartTime through openVideo/playPreferringDownloaded/play
so explicit link timestamps beat the 90%-watched restart threshold,
clamped to just before the end; resume flows keep the old behavior
- Carry the parsed timestamp through OpenLinkSheet's play action, which
dropped it entirely
- Cover timestamp parsing and wrapper unwrapping in NavigationTests
