Switch WiFi config from NetworkManager to Netplan+wpa_supplicant

Armbian minimal uses systemd-networkd+wpa_supplicant via Netplan, not NM.
Write Netplan YAML, wpa_supplicant-wlan0.conf, and networkd .network file.
Enable wpa_supplicant@wlan0.service via symlink if template exists.

operator_setup.sh

@@ -478,42 +478,63 @@ info "Mounted at ${MOUNT_POINT} ($(blkid -o value -s TYPE "${_ROOTFS_PART:-/dev/
 # ══════════════════════════════════════════════════════════════════════════════
 section "Applying Configuration"
 
-# WiFi profile
+# WiFi profile — Armbian uses Netplan + wpa_supplicant (not NetworkManager)
 if [[ -n "$WIFI_SSID" ]]; then
     step "Writing WiFi profile..."
-    NM_DIR="${MOUNT_POINT}/etc/NetworkManager/system-connections"
-    NM_FILE="${NM_DIR}/wifi-bb.nmconnection"
-    mkdir -p "$NM_DIR"
 
-    WIFI_UUID=$(cat /proc/sys/kernel/random/uuid)
-    cat > "$NM_FILE" << EOF
-[connection]
-id=wifi-bb
-uuid=${WIFI_UUID}
-type=wifi
-autoconnect=true
-autoconnect-priority=10
+    # Netplan config (primary — renderer: networkd)
+    mkdir -p "${MOUNT_POINT}/etc/netplan"
+    cat > "${MOUNT_POINT}/etc/netplan/20-wifi.yaml" << EOF
+network:
+  version: 2
+  renderer: networkd
+  wifis:
+    wlan0:
+      dhcp4: yes
+      dhcp6: no
+      access-points:
+        "${WIFI_SSID}":
+          password: "${WIFI_PASS}"
+EOF
+    chmod 600 "${MOUNT_POINT}/etc/netplan/20-wifi.yaml"
 
-[wifi]
-mode=infrastructure
-ssid=${WIFI_SSID}
+    # wpa_supplicant direct config (backup — used by wpa_supplicant@wlan0.service)
+    mkdir -p "${MOUNT_POINT}/etc/wpa_supplicant"
+    cat > "${MOUNT_POINT}/etc/wpa_supplicant/wpa_supplicant-wlan0.conf" << EOF
+ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
+update_config=1
+country=US
 
-[wifi-security]
-auth-alg=open
-key-mgmt=wpa-psk
-psk=${WIFI_PASS}
+network={
+    ssid="${WIFI_SSID}"
+    psk="${WIFI_PASS}"
+    key_mgmt=WPA-PSK
+    scan_ssid=1
+}
+EOF
+    chmod 600 "${MOUNT_POINT}/etc/wpa_supplicant/wpa_supplicant-wlan0.conf"
 
-[ipv4]
-method=auto
+    # systemd-networkd config for wlan0 DHCP
+    mkdir -p "${MOUNT_POINT}/etc/systemd/network"
+    cat > "${MOUNT_POINT}/etc/systemd/network/10-wifi-wlan0.network" << EOF
+[Match]
+Name=wlan0
 
-[ipv6]
-addr-gen-mode=stable-privacy
-method=auto
+[Network]
+DHCP=yes
+IPv6PrivacyExtensions=yes
 EOF
 
-    chmod 600 "$NM_FILE"
-    chown root:root "$NM_FILE"
-    info "WiFi profile written (SSID: ${WIFI_SSID}, UUID: ${WIFI_UUID})"
+    # Enable wpa_supplicant@wlan0 if the template service exists
+    WPA_TEMPLATE="${MOUNT_POINT}/lib/systemd/system/wpa_supplicant@.service"
+    WPA_WANTS="${MOUNT_POINT}/etc/systemd/system/multi-user.target.wants"
+    if [[ -f "$WPA_TEMPLATE" ]]; then
+        mkdir -p "$WPA_WANTS"
+        ln -sf /lib/systemd/system/wpa_supplicant@.service \
+            "${WPA_WANTS}/wpa_supplicant@wlan0.service"
+    fi
+
+    info "WiFi profile written (SSID: ${WIFI_SSID})"
 fi
 
 # Root password