feat: keep admin portal online

main/mimi.c

@@ -159,10 +159,14 @@ void app_main(void)
 
     if (!wifi_ok) {
         ESP_LOGW(TAG, "Entering WiFi onboarding mode...");
-        wifi_onboard_start();  /* blocks, restarts on success */
+        wifi_onboard_start(WIFI_ONBOARD_MODE_CAPTIVE);  /* blocks, restarts on success */
         return;  /* unreachable */
     }
 
+    if (wifi_onboard_start(WIFI_ONBOARD_MODE_ADMIN) != ESP_OK) {
+        ESP_LOGW(TAG, "Local admin portal unavailable; continuing without config hotspot");
+    }
+
     {
         /* Outbound dispatch task should start first to avoid dropping early replies. */
         ESP_ERROR_CHECK((xTaskCreatePinnedToCore(

main/onboard/wifi_onboard.h

@@ -2,9 +2,14 @@
 
 #include "esp_err.h"
 
+typedef enum {
+    WIFI_ONBOARD_MODE_CAPTIVE = 0,
+    WIFI_ONBOARD_MODE_ADMIN,
+} wifi_onboard_mode_t;
+
 /**
- * Start WiFi onboarding captive portal.
- * Opens a soft AP, DNS hijacker, and HTTP configuration server.
- * Blocks until the user submits credentials, then saves to NVS and restarts.
+ * Start WiFi onboarding/configuration portal.
+ * CAPTIVE mode opens DNS hijack + config page and blocks forever.
+ * ADMIN mode keeps a local config hotspot alive without captive redirects.
  */
-esp_err_t wifi_onboard_start(void);
+esp_err_t wifi_onboard_start(wifi_onboard_mode_t mode);

main/wifi/wifi_manager.c

@@ -15,6 +15,7 @@ static EventGroupHandle_t s_wifi_event_group;
 static int s_retry_count = 0;
 static char s_ip_str[16] = "0.0.0.0";
 static bool s_connected = false;
+static bool s_reconnect_enabled = true;
 
 static const char *wifi_reason_to_str(wifi_err_reason_t reason)
 {
@@ -44,7 +45,7 @@ static void event_handler(void *arg, esp_event_base_t event_base,
         if (disc) {
             ESP_LOGW(TAG, "Disconnected (reason=%d:%s)", disc->reason, wifi_reason_to_str(disc->reason));
         }
-        if (s_retry_count < MIMI_WIFI_MAX_RETRY) {
+        if (s_reconnect_enabled && s_retry_count < MIMI_WIFI_MAX_RETRY) {
             /* Exponential backoff: 1s, 2s, 4s, 8s, ... capped at 30s */
             uint32_t delay_ms = MIMI_WIFI_RETRY_BASE_MS << s_retry_count;
             if (delay_ms > MIMI_WIFI_RETRY_MAX_MS) {
@@ -120,6 +121,7 @@ esp_err_t wifi_manager_start(void)
         return ESP_ERR_NOT_FOUND;
     }
 
+    s_reconnect_enabled = true;
     ESP_LOGI(TAG, "Connecting to SSID: %s", wifi_cfg.sta.ssid);
 
     ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
@@ -252,6 +254,7 @@ bool wifi_manager_has_credentials(void)
 
 esp_err_t wifi_manager_stop(void)
 {
+    s_reconnect_enabled = false;
     esp_wifi_disconnect();
     esp_wifi_stop();
     s_connected = false;
@@ -260,3 +263,11 @@ esp_err_t wifi_manager_stop(void)
     ESP_LOGI(TAG, "WiFi stopped");
     return ESP_OK;
 }
+
+void wifi_manager_set_reconnect_enabled(bool enabled)
+{
+    s_reconnect_enabled = enabled;
+    if (!enabled) {
+        s_retry_count = 0;
+    }
+}

main/wifi/wifi_manager.h

@@ -59,3 +59,8 @@ bool wifi_manager_has_credentials(void);
  * Stop WiFi (for mode switching during onboarding).
  */
 esp_err_t wifi_manager_stop(void);
+
+/**
+ * Enable or disable STA auto-reconnect on disconnect events.
+ */
+void wifi_manager_set_reconnect_enabled(bool enabled);