board: fix double-press confirm window on WT2 and V4.3

Both emit ENTER via a zephyr,input-longpress filter (single button),
same category the Kconfig help text already documents as needing
CONFIG_ZEPHCORE_UI_CONFIRM_WINDOW_MS=3000 instead of the 500ms
default -- two ~1s holds don't fit in 500ms, so the second long press
on shutdown/DFU/offgrid always arrives after the window closed and
just re-arms instead of confirming. T096 already had this set
(board.conf:38); WT2 and V4.3 didn't, apparently missed when their
board.conf was written.

zephcore/boards/esp32/heltec_wifi_lora32_v43/board.conf

@@ -23,3 +23,8 @@ CONFIG_ZEPHCORE_SX126X_HELTEC_REG_PATCH=y
 # Measured (MeshCore issue #1708, GC1109 data — KCT8103L similar): TX=18 → ~27 dBm
 # radiated, practical efficiency peak. TX=10 → ~20 dBm; TX=22 saturates same as TX=18.
 CONFIG_ZEPHCORE_DEFAULT_TX_POWER_DBM=12
+
+# Single button, ENTER emitted via a zephyr,input-longpress filter (see
+# board.overlay): the default 500ms double-press confirm window (shutdown/
+# DFU/offgrid) is too short for two ~1s holds, see Kconfig help text.
+CONFIG_ZEPHCORE_UI_CONFIRM_WINDOW_MS=3000

zephcore/boards/esp32/heltec_wireless_tracker_v2/board.conf

@@ -23,3 +23,8 @@ CONFIG_ZEPHCORE_SX126X_HELTEC_REG_PATCH=y
 # the PA enabled. The module is physically capable of higher output; start
 # conservative to avoid overdriving the front end.
 CONFIG_ZEPHCORE_DEFAULT_TX_POWER_DBM=9
+
+# Single button, ENTER emitted via a zephyr,input-longpress filter (see
+# board.overlay): the default 500ms double-press confirm window (shutdown/
+# DFU/offgrid) is too short for two ~1s holds, see Kconfig help text.
+CONFIG_ZEPHCORE_UI_CONFIRM_WINDOW_MS=3000