[midea] Add WiFi library for ESPHome 2026.2.0 compatibility

ESPHome 2026.2.0 selective Arduino compilation requires explicit WiFi
library declaration to make Network headers available for MideaUART.

Author: parkghost

esphome/components/midea/climate.py

@@ -30,7 +30,7 @@
     UNIT_PERCENT,
     UNIT_WATT,
 )
-from esphome.core import coroutine
+from esphome.core import CORE, coroutine
 
 CODEOWNERS = ["@dudanov"]
 DEPENDENCIES = ["climate", "uart"]
@@ -290,4 +290,7 @@ async def to_code(config):
     if CONF_HUMIDITY_SETPOINT in config:
         sens = await sensor.new_sensor(config[CONF_HUMIDITY_SETPOINT])
         cg.add(var.set_humidity_setpoint_sensor(sens))
+    # MideaUART library requires WiFi (WiFi auto-enables Network via dependency mapping)
+    if CORE.is_esp32:
+        cg.add_library("WiFi", None)
     cg.add_library("MideaUART", None, "https://github.com/rrelande/MideaUART.git#adding-light")