Keep the Wi-Fi setup portal open when opened on purpose

Choosing Wi-Fi setup (or holding BOOT) while already connected used to
fall straight through: run_portal waited for a connection, which the
existing Wi-Fi satisfied at once. A forced portal now stays open until
new credentials are saved (which restarts the device); the no-connection
fallback still proceeds on auto-reconnect.

main/main.c

@@ -17,13 +17,20 @@
 
 static const char *TAG = "main";
 
-static void run_portal(void)
+static void run_portal(bool forced)
 {
     net_start_portal();
     leds_set_mode(LED_BREATHE, 0x8030ff);
     ui_status("Wi-Fi setup",
               "Join the Wi-Fi network\n\"" CONFIG_WIDGET_AP_SSID "\" with your phone.\n"
               "The setup page opens by itself\n(or browse to http://192.168.4.1)");
+    // When the user asked for setup we stay here until they save new credentials
+    // (which restarts the device). Otherwise the existing Wi-Fi would satisfy the
+    // wait immediately and we'd fall through to the streams. On a plain fallback
+    // (no/failed connection) we let an auto-reconnect carry us onward.
+    if (forced) {
+        while (1) vTaskDelay(pdMS_TO_TICKS(1000));
+    }
     net_wait_connected(-1);
 }
 
@@ -55,10 +62,10 @@ void app_main(void)
     input_init();
 
     if (force_setup || !net_has_credentials()) {
-        run_portal();
+        run_portal(force_setup);
     } else {
         ui_status("insecam widget", "connecting to Wi-Fi");
-        if (!net_wait_connected(20000)) run_portal();
+        if (!net_wait_connected(20000)) run_portal(false);
     }
     ESP_LOGI(TAG, "online at %s", net_ip_str());
     ui_status("insecam widget", "online - finding cameras\n\nturn:  next / previous\nclick: pause\nhold:  menu");