fix: resolve 8 CI build failures in custom usermod environments

- BME280_v2: fix default_envs typo (usermod_bme280_esp8266_2m →
  usermod_esp8266_2m to match actual [env:] section name)
- DHT: replace extends env:custom32_LEDPIN_16 (not in this fork) with
  env:esp32dev + -D LEDPIN=16; rename env accordingly
- SN_Photoresistor: replace ${common.build_flags_esp8266} (key absent in
  this fork) with ${env:esp8266_2m.build_flags} / lib_deps equivalent
- sht: guard ESP.getChipModel() behind #ifdef ARDUINO_ARCH_ESP32 — method
  does not exist on ESP8266 (fixes custom_esp8266_2m_usermod_sht build)
- EleksTube_IPS: delete platformio_override.ini.sample — library.json is
  disabled so the env cannot build; delete rather than ship a broken sample
- pixels_dice_tray: exclude from build_custom matrix (same as standard
  matrix) — BLE library incompatibility with current IDF causes build failure
- workflow: add PWM_fan / BME68X_v2 to exclusion list in get_custom_build_envs
  for consistency with get_usermod_envs

Author: netmindz

.github/workflows/usermods.yml

@@ -122,6 +122,8 @@ jobs:
         result='[]'
         for sample in $samples; do
           usermod=$(dirname "$sample" | xargs basename)
+          # Skip usermods known to be incompatible (same list as get_usermod_envs)
+          case "$usermod" in PWM_fan|BME68X_v2|pixels_dice_tray) continue ;; esac
           envs=$(grep -E '^\[env:[^]]+\]' "$sample" | sed 's/^\[env:\(.*\)\]$/\1/')
           for env in $envs; do
             result=$(echo "$result" | jq --arg u "$usermod" --arg e "$env" '. + [{usermod: $u, env: $e}]')

usermods/BME280_v2/platformio_override.ini.sample

@@ -2,7 +2,7 @@
 # Copy to platformio_override.ini in the WLED root to use.
 
 [platformio]
-default_envs = usermod_bme280_esp8266_2m
+default_envs = usermod_esp8266_2m
 
 [env:usermod_esp8266_2m]
 extends = env:esp8266_2m

usermods/DHT/platformio_override.ini.sample

@@ -13,8 +13,8 @@ extends = env:esp8266_2m
 custom_usermods = ${env:esp8266_2m.custom_usermods} DHT
 build_flags = ${env:esp8266_2m.build_flags} -D USERMOD_DHT_CELSIUS
 
-[env:custom32_LEDPIN_16_usermod_dht_C]
-extends = env:custom32_LEDPIN_16
-custom_usermods = ${env:custom32_LEDPIN_16.custom_usermods} DHT
-build_flags = ${env:custom32_LEDPIN_16.build_flags} -D USERMOD_DHT_CELSIUS -D USERMOD_DHT_STATS
+[env:esp32dev_LEDPIN_16_usermod_dht_C]
+extends = env:esp32dev
+custom_usermods = ${env:esp32dev.custom_usermods} DHT
+build_flags = ${env:esp32dev.build_flags} -D LEDPIN=16 -D USERMOD_DHT_CELSIUS -D USERMOD_DHT_STATS
 

usermods/EleksTube_IPS/platformio_override.ini.sample

@@ -11,6 +11,6 @@
 extends = env:esp8266_2m
 custom_usermods = ${env:esp8266_2m.custom_usermods} SN_Photoresistor
 build_flags =
-    ${common.build_flags_esp8266}
+    ${env:esp8266_2m.build_flags}
     -D USERMOD_SN_PHOTORESISTOR_MEASUREMENT_INTERVAL=60
-lib_deps = ${env.lib_deps}
+lib_deps = ${env:esp8266_2m.lib_deps}

usermods/SN_Photoresistor/platformio_override.ini.sample

@@ -143,7 +143,13 @@ void ShtUsermod::appendDeviceToMqttDiscoveryMessage(JsonDocument& root) {
   device[F("ids")] = escapedMac.c_str();
   device[F("name")] = serverDescription;
   device[F("sw")] = versionString;
+  // AI: below section was generated by an AI
+  #ifdef ARDUINO_ARCH_ESP32
   device[F("mdl")] = ESP.getChipModel();
+  #else
+  device[F("mdl")] = F("ESP8266");
+  #endif
+  // AI: end
   device[F("mf")] = F("espressif");
 }