feat(assets): embed LCD and audio resources in OTA app

docs/multi-wifi-credential-retention.zh-CN.md

@@ -321,13 +321,13 @@ Wi-Fi 断开表情在离线期间每 5 秒刷新一次，但被动断网提示
 
 ```c
 if (!control_plane_is_sta_connected()) {
-    play_prompt("network_unstable.opus");
+    play_prompt("audio_prompts/network_unstable.opus");
     request_immediate_wifi_reconnect();
     return ESP_ERR_INVALID_STATE;
 }
 
 if (server_outage_confirmed) {
-    play_prompt("server_repair_wait_reopen.opus");
+    play_prompt("audio_prompts/server_repair_wait_reopen.opus");
     schedule_fresh_auth_websocket_reconnect();
     return ESP_ERR_INVALID_STATE;
 }