feat: web-based WiFi setup via captive portal, portrait-only display

- Remove touchscreen WiFi setup (touch.c, keyboard.c, wifi_setup.c from build)
- Remove offscreen buffer and landscape rotation from axs15231b driver
- Add /setup HTML page with WiFi scan/connect via captive portal
- Add /wifi/scan, /wifi/connect, /wifi/status HTTP endpoints
- Display shows SETUP_PENDING (QR + SSID + setup URL) when unconfigured
- Display shows ERROR with setup URL when upstream is down
- All 101 unit tests pass, builds and flashes to Board C

1 files changed, 5 insertions, 2 deletions

diff --git a/main/tollgate_main.c b/main/tollgate_main.c
index 59d25f5..9421e16 100644
--- a/main/tollgate_main.c
+++ b/main/tollgate_main.c
@@ -325,8 +325,11 @@ void app_main(void)
                    tcfg->mint_url, tcfg->price_per_step, "connecting...");
 
     if (tollgate_config_get_wifi(&(wifi_config_t){0}) != ESP_OK) {
-        ESP_LOGI(TAG, "No STA network configured, entering WiFi setup");
-        display_enter_wifi_setup();
+        ESP_LOGI(TAG, "No STA network configured, starting setup mode");
+        char portal_url[128];
+        snprintf(portal_url, sizeof(portal_url), "http://%s/", tcfg->ap_ip_str);
+        display_update(NULL, 0, 0, portal_url, NULL, 0, "setup mode");
+        display_set_state(DISPLAY_SETUP_PENDING);
         xTaskCreate(services_start_task, "svc_start", 32768, NULL, 5, NULL);
     }