net: app_network.py reflects WiFi swap — uplink on wlan0, AP on wlan1

modules/app_network.py

@@ -9,8 +9,11 @@ BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 INSTALLED_HELPER = "/usr/local/bin/yaris-uplink"
 REPO_HELPER = os.path.join(BASE_DIR, "deploy", "yaris_uplink.py")
 PHONE_CONNECTION = "phone-hotspot"
-PRIMARY_INTERFACE = "wlan1"
-FALLBACK_INTERFACE = "wlan0"
+# 2026-08-12 swap: onboard (wlan0) carries the internet uplink; the fast
+# T3U (wlan1) hosts the in-car AP.
+PRIMARY_INTERFACE = "wlan0"
+FALLBACK_INTERFACE = "wlan1"
+AP_INTERFACE = "wlan1"
 STATUS_PATH = "/var/lib/yaris-obd/uplink-status.json"
 
 
@@ -135,23 +138,23 @@ def get_status():
     phone_ssid = _phone_ssid()
     internet_reachable = connectivity == "4 (full)"
 
-    # Check wlan0 AP state (permanent hotspot)
+    # Check AP state on wlan1 (T3U)
     ap_active = False
     ap_ip = ""
     try:
         ap_active = subprocess.run(
-            ["nmcli", "-g", "GENERAL.CONNECTION", "device", "show", "wlan0"],
+            ["nmcli", "-g", "GENERAL.CONNECTION", "device", "show", AP_INTERFACE],
             capture_output=True, text=True, timeout=5,
         ).stdout.strip() == "Hotspot-local"
         if ap_active:
             ap_ip = subprocess.run(
-                ["nmcli", "-g", "IP4.ADDRESS", "device", "show", "wlan0"],
+                ["nmcli", "-g", "IP4.ADDRESS", "device", "show", AP_INTERFACE],
                 capture_output=True, text=True, timeout=5,
             ).stdout.strip().split("/", 1)[0]
     except (OSError, subprocess.SubprocessError):
         pass
 
-    # Mode reflects wlan1 uplink state, not wlan0 AP
+    # Mode reflects the uplink interface state, not the AP
     uplink_mode = (
         "phone" if active == PHONE_CONNECTION
         else "wifi" if active