Add local OLED recovery controls

src/session_broker.c

@@ -518,6 +518,38 @@ esp_err_t session_broker_force_writer(session_broker_client_id_t client_id)
     return ESP_OK;
 }
 
+esp_err_t session_broker_force_release_writer(
+    session_broker_client_id_t expected_writer_id)
+{
+    if (!s_initialized) {
+        return ESP_ERR_INVALID_STATE;
+    }
+    if (expected_writer_id == SESSION_BROKER_NO_CLIENT) {
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    xSemaphoreTake(s_mutex, portMAX_DELAY);
+    if (s_writer_id != expected_writer_id) {
+        xSemaphoreGive(s_mutex);
+        return ESP_ERR_NOT_FOUND;
+    }
+    session_broker_slot_t *writer = find_slot_locked(expected_writer_id);
+    if (writer == NULL) {
+        xSemaphoreGive(s_mutex);
+        return ESP_ERR_NOT_FOUND;
+    }
+
+    s_writer_id = SESSION_BROKER_NO_CLIENT;
+    ++writer->counters.writer_revocations;
+    ++writer->counters.writer_changes;
+    ++s_counters.writer_revocations;
+    ++s_counters.writer_changes;
+    broadcast_event_locked(SESSION_BROKER_EVENT_WRITER_REVOKED,
+                           expected_writer_id, s_writer_id);
+    xSemaphoreGive(s_mutex);
+    return ESP_OK;
+}
+
 session_broker_client_id_t session_broker_get_writer_id(void)
 {
     if (!s_initialized) {