refactor(ui-lvgl): review -- shared button bar, confirms, notes, local time

- Dead code gone: anim::fadeHide, radioctl::presetCount, the L2 board's
  setSdPower / setGrovePower / expanderOK (awRead, gnssReset now private).
- buttonBar() / barButton() replace 7 copies of the popup button row.
- confirmBody(): one red-button confirm for reboot / power off, reset
  counters, admin commands, preset and scope delete.
- tapConfirmed(): the 11 "tap again" buttons share one mechanism, 3 s
  everywhere, the label restored when left alone.
- noteLabel() for ~30 wrapped notes.
- localTm() in NodePrefs.h and one MONTHS table: lvgl, MsgExpand, the L1
  clock and lock screen.
- The sim keeps UI settings in an in-memory nvs::, so one set of load /
  save helpers serves both.
- Asleep, the loop wakes every 50 ms (the button / touch poll), not 20.

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

docs/development/plan-next.md

@@ -76,6 +76,16 @@ for a second radio). They are L2-specific and block the loop for ~90 s.
       places to speed things up or save RAM, flash and battery.
       First a list of findings to accept, then fixes in batches, each checked
       in the sim and on the device.
+      Done 2026-09-28 (-265 lines): dead code (anim::fadeHide,
+      presetCount, the L2 board's setSdPower / setGrovePower / expanderOK);
+      one buttonBar() / barButton() for 7 copies of the button row;
+      confirmBody() for 5 red-button popups; tapConfirmed() for 11
+      "tap again" buttons, all 3 s and the label restored; noteLabel() for
+      ~30 wrapped notes; localTm() in NodePrefs.h and one MONTHS table
+      (lvgl, MsgExpand, the L1 clock); the sim keeps UI settings in an
+      in-memory nvs::, one set of load / save helpers; asleep, the loop
+      wakes every 50 ms, not 20. Left: map tables to PSRAM only if the
+      internal heap gets tight; emoji 1.25 MB of flash (fits).
 
 ## G. Core parity with L1 SOLO