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>

variants/wio-tracker-l2/WioTrackerL2Board.h

@@ -68,21 +68,9 @@ public:
       expWritePin(EXP_PIN_GNSS_EN, LOW);
     }
   }
-  // microSD rail (unmount first)
-  void setSdPower(bool on) { expWritePin(EXP_PIN_TF_EN, on); }
-  // Grove expansion port rail (nothing on-board depends on it)
-  void setGrovePower(bool on) { expWritePin(EXP_PIN_GROVE_EN, on); }
 
   bool gnssPowered() const { return (out_shadow[EXP_PIN_GNSS_EN >> 3] >> (EXP_PIN_GNSS_EN & 7)) & 1; }
 
-  // hardware reset pulse to the L76K GNSS (active HIGH on this board); the
-  // module keeps almanac/ephemeris across it, so this is a warm restart
-  void gnssReset() {
-    expWritePin(EXP_PIN_GNSS_RST, HIGH);
-    delay(10);
-    expWritePin(EXP_PIN_GNSS_RST, LOW);
-  }
-
   // WAKE button on expander P00: pressed = level differs from boot baseline
   bool readWakeButton();
 
@@ -93,9 +81,6 @@ public:
 
   // VBUS presence via the AW35615 USB-C controller (I2C 0x22)
   bool isExternalPowered() override;
-  int awRead(uint8_t reg);   // AW35615 register, -1 on error
-
-  bool expanderOK() const { return expander_ok; }
 
 private:
   uint8_t out_shadow[2] = { 0xFF, 0xFF };  // TCA9535 output regs default high
@@ -107,6 +92,15 @@ private:
   uint32_t batt_read_ms = 0;       // when it was taken (reads closer together reuse it)
 
   int expReadInputs();   // 16-bit input register pair, -1 on error
+  int awRead(uint8_t reg);   // AW35615 register, -1 on error
+
+  // hardware reset pulse to the L76K GNSS (active HIGH on this board); the
+  // module keeps almanac/ephemeris across it, so this is a warm restart
+  void gnssReset() {
+    expWritePin(EXP_PIN_GNSS_RST, HIGH);
+    delay(10);
+    expWritePin(EXP_PIN_GNSS_RST, LOW);
+  }
 
   bool expWriteReg(uint8_t reg, uint8_t val);
   void expSetOutput(uint8_t pin, bool initial_level);