Remove WiFi station (client) support

- Drop station connect/status/credentials from wifi util and settings API
- Remove station activation from main
- Remove station UI and JS from index, settings template, and help.js
- Device settings now only configure WiFi Access Point

Co-authored-by: Cursor <cursoragent@cursor.com>

src/util/wifi.py

@@ -1,28 +1,4 @@
 import network
-from time import sleep
-
-def connect(ssid, password, ip, gateway):
-    if ssid is None:
-        print("Missing ssid")
-        return None
-    if password is None:
-        password = ''
-    try:
-        sta_if = network.WLAN(network.STA_IF)
-        if ip is not None and gateway is not None:
-            sta_if.ifconfig((ip, '255.255.255.0', gateway, '1.1.1.1'))
-        if not sta_if.isconnected():
-            print('connecting to network...')
-            sta_if.active(True)
-            sta_if.connect(ssid, password)
-            sleep(0.1)
-            if sta_if.isconnected():
-                return sta_if.ifconfig()
-            return None
-        return sta_if.ifconfig()
-    except Exception as e:
-        print(f"Failed to connect to wifi {e}")
-        return None
 
 
 def ap(ssid, password, channel=None):
@@ -42,6 +18,7 @@ def get_mac():
     ap_if = network.WLAN(network.AP_IF)
     return ap_if.config('mac')
 
+
 def get_ap_config():
     """Get current AP configuration."""
     try:
@@ -63,38 +40,3 @@ def get_ap_config():
     except Exception as e:
         print(f"Error getting AP config: {e}")
         return None
-
-def get_sta_status():
-    """Get current station connection status."""
-    try:
-        sta_if = network.WLAN(network.STA_IF)
-        if sta_if.active():
-            if sta_if.isconnected():
-                config = sta_if.ifconfig()
-                return {
-                    'connected': True,
-                    'ssid': sta_if.config('essid'),
-                    'ip': config[0] if config else None,
-                    'gateway': config[2] if len(config) > 2 else None,
-                    'netmask': config[1] if len(config) > 1 else None,
-                    'dns': config[3] if len(config) > 3 else None
-                }
-            return {
-                'connected': False,
-                'ssid': None,
-                'ip': None,
-                'gateway': None,
-                'netmask': None,
-                'dns': None
-            }
-        return {
-            'connected': False,
-            'ssid': None,
-            'ip': None,
-            'gateway': None,
-            'netmask': None,
-            'dns': None
-        }
-    except Exception as e:
-        print(f"Error getting STA status: {e}")
-        return None