Docs: update according to changes in the new versions

web-panel.md:
- Replace Start OTA nav item with dedicated Firmware Update section
- Update Info panel: Version/Client Version → Hardware/Firmware
- Add auto-refresh toggle to /stats element list
- Expand Trends list: add error_rate, core0_util, mcu_temp,
  note RX/TX stacked rendering of packets series
- Update sequential trend loading order accordingly
- Rewrite OTA subsection to describe native HTTPS upload flow

api.md:
- Add error_rate and core0_util to supported series list

boards.md:
- Add DIY_ESP32S3_N16R8_E22_Back2back to repeater_mqtt table

local-builds.md:
- Add DIY_ESP32S3_N16R8_E22_Back2back_repeater_mqtt
- Add Ebyte_EoRa-S3_Repeater_mqtt
- Add ThinkNode_M2_Repeater_mqtt
- Add ThinkNode_M5_Repeater_mqtt

docs/local-builds.md

@@ -65,6 +65,8 @@ bash build.sh build-firmware heltec_v4_repeater_mqtt
 Это полные имена окружений PlatformIO, используемые для локальных сборок из исходников и для имён релизных файлов.
 
 ```text
+DIY_ESP32S3_N16R8_E22_Back2back_repeater_mqtt
+Ebyte_EoRa-S3_Repeater_mqtt
 Generic_E22_sx1262_repeater_mqtt
 Generic_E22_sx1268_repeater_mqtt
 Heltec_E213_repeater_mqtt
@@ -94,6 +96,8 @@ Station_G2_repeater_mqtt
 T_Beam_S3_Supreme_SX1262_repeater_mqtt
 Tbeam_SX1262_repeater_mqtt
 Tbeam_SX1276_repeater_mqtt
+ThinkNode_M2_Repeater_mqtt
+ThinkNode_M5_Repeater_mqtt
 WHY2025_badge_repeater_mqtt
 Xiao_C6_repeater_mqtt
 Xiao_S3_WIO_repeater_mqtt