fix(theme): #79 review fixes — wrap-around schedule + HH:MM guard

Two low-severity edge bugs from a fresh-eyes review of the session batch:

- cmd_auto: an inverted schedule (sunrise > sunset, i.e. a day window that
  crosses midnight) stayed perpetually on the day theme — the old
  `not between` shortcut is an empty interval when sunrise > sunset.
  Replaced with a real wrap-around: daytime = mins >= sunrise or
  mins < sunset, so both directions switch. Normal sunrise < sunset path
  is unchanged (checks.auto-theme still holds).
- rofi autotheme HH:MM validator: `[0-2][0-9]` accepted 24:00–29:59.
  Tightened the case pattern to `[01][0-9]:[0-5][0-9]|2[0-3]:[0-5][0-9]`
  so out-of-range hours are rejected (they'd otherwise skew the boundary).

(Two other review findings dismissed: papirus DOES ship breeze/breeze-dark
so that iconPacks prefix is correct; the doctor RAM-unknown row is cosmetic
since /proc/meminfo is always readable.)

Verification: py_compile; boundary truth-table (normal + wrap-around);
HH:MM case table (23:00/19:59/20:00 accept, 24/25/30:00 reject); auto
--which normal-case unchanged; menu bash -n; flake check green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

modules/home/rofi.nix

@@ -752,7 +752,7 @@ ${themeRows}
             case "$choice" in "Sunset"*) key=sunset; label=Sunset; cur="''${sunset:-20:00}" ;; esac
             t=$(rofi_menu -p "$label HH:MM (now $cur)" < /dev/null) || exec "$0" autotheme
             case "$t" in
-              [0-2][0-9]:[0-5][0-9])
+              [01][0-9]:[0-5][0-9]|2[0-3]:[0-5][0-9])
                 nomarchy-theme-sync --quiet set "settings.autoTheme.$key" "$t" --no-switch ;;
               "") : ;;
               *) notify-send "Auto theme" "Ignored '$t' — use HH:MM (24-hour)." ;;