add &latest= to private timeline paging automatically; support &earliest= as well

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   Alexandre Oliva (lxo@snac.lx.oliva.nom.br)'s status on Saturday, 01-Feb-2025 23:07:40 JST Alexandre Oliva

   in reply to
   here's an implementation of &latest= and &earliest= taking exclusively md5 codes.
   
   it automatically adds &latest= when one starts paging the private timeline, so that reloading those pages becomes stable (as in, will bring the same posts, even after a while), without depending on any server-side state. &earliest= is only added manually.
   
   CC: @grunfink@comam.es