R5C final config: 2.4GHz-only AP mode due to RTL8822CE limitations

FriendlyElec R5C RTL8822CE WiFi chip does not support 5GHz AP mode.
Both wlan0 and wlan1 locked to 2.4GHz-only (mode 2) by firmware/driver.

Tested:
- Channel 149 (5GHz): fails with 'mode (2) not found'
- Channel 36 (5GHz): fails with 'mode (2) not found'
- Both wlan0 and wlan1: same limitation
- Regulatory domain persistence doesn't change mode

Solution: Configure hostapd for 2.4GHz (hw_mode=g, channel 6)
- VanLink2 now on wlan1, 2.4GHz channel 6
- VanLink2-2G still on wlan2, 2.4GHz channel 6
- Both working stably

R5C not recommended for 5GHz AP use; consider Pi 5 or other board
if 5GHz dual-band AP is required.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

ap/hostapd.conf

@@ -11,20 +11,13 @@ driver=nl80211
 ssid=VanLink2
 country_code=CA
 ieee80211d=1
-ieee80211h=0
-hw_mode=a
-channel=149
+hw_mode=g
+channel=6
 wmm_enabled=1
+# 2.4GHz only — RTL8822CE on FriendlyElec R5C does not support 5GHz AP mode
+# (firmware/driver limitation; both wlan0 and wlan1 locked to 2.4GHz)
 ieee80211n=1
-ht_capab=[HT40+][SHORT-GI-20][SHORT-GI-40]
-# Disabled: VHT/80MHz causes RTL8822CE driver lockup on channel 149
-# ieee80211ac=1
-# vht_oper_chwidth=1
-# vht_oper_centr_freq_seg0_idx=155
-# vht_capab=[RXLDPC][SHORT-GI-80][SU-BEAMFORMEE]
-# ieee80211ax=1
-# he_oper_chwidth=1
-# he_oper_centr_freq_seg0_idx=155
+ht_capab=[HT20][SHORT-GI-20]
 auth_algs=1
 wpa=2
 wpa_passphrase=1foot11foot11