CLI: changeset show prints local time

Created and Applied were printed in UTC, while history and status print
local time.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -111,6 +111,9 @@ All notable changes to Jarl are documented here. The format follows
   "Other views:" when the server was older than the CLI (0.6.1-rc.2
   sends the count but not the addresses). It now prints just the count
   line then.
+- `jarl changeset show` printed its Created and Applied times in UTC,
+  while `jarl history` and `jarl status` print local time. It uses local
+  time now too.
 
 - The statistics' "Busiest times" grid drew hours without data taller
   than the others (they picked up the page's padding for empty