feat: integrate touchscreen WiFi setup into display UI

- Add DISPLAY_WIFI_SETUP state with full rendering pipeline
- Touch init on display_init(), touch polling in display task
- WiFi scan triggered on setup entry, sorted AP list
- On-screen keyboard for password entry
- Connect result via WiFi event notifications
- Setup button on READY and ERROR screens
- Auto-enter WiFi setup on first boot with no credentials
- Save new WiFi credentials to SPIFFS config.json

1 files changed, 7 insertions, 1 deletions

diff --git a/main/tollgate_main.c b/main/tollgate_main.c
index 345295a..59d25f5 100644
--- a/main/tollgate_main.c
+++ b/main/tollgate_main.c
@@ -54,6 +54,7 @@ static void wifi_event_handler(void *arg, esp_event_base_t event_base,
         s_retry_count++;
         ESP_LOGW(TAG, "WiFi disconnected, retry %d/%d", s_retry_count, MAX_STA_RETRY);
         tollgate_client_on_sta_disconnected();
+        display_notify_wifi_disconnected();
         if (s_services_running) {
             stop_services();
             display_set_state(DISPLAY_ERROR);
@@ -102,6 +103,10 @@ static void ip_event_handler(void *arg, esp_event_base_t event_base,
         s_retry_count = 0;
         xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
 
+        char ip_str[16];
+        snprintf(ip_str, sizeof(ip_str), IPSTR, IP2STR(&event->ip_info.ip));
+        display_notify_wifi_connected(ip_str);
+
         esp_sntp_stop();
         esp_sntp_setoperatingmode(SNTP_OPMODE_POLL);
         esp_sntp_setservername(0, "pool.ntp.org");
@@ -320,7 +325,8 @@ 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, starting services immediately");
+        ESP_LOGI(TAG, "No STA network configured, entering WiFi setup");
+        display_enter_wifi_setup();
         xTaskCreate(services_start_task, "svc_start", 32768, NULL, 5, NULL);
     }