Fix postcode lookup and options flow; clean up dependencies

Switch to the new carbon_intensity_uk API library and pin it
(carbon_intensity_uk==1.0.1) so Home Assistant reliably installs and
upgrades it. This fixes postcode validation in the config flow.

Clean up manifest requirements: drop aiohttp (provided by Home
Assistant core) and numpy (a transitive dependency of the library).

Fix the options flow for Home Assistant 2025.12+, where
OptionsFlow.config_entry became a read-only property: stop assigning
it in the handler and read the entry options in async_step_init
instead. Raise the HACS minimum Home Assistant version to 2024.11.0
accordingly (older versions also lacked APIs the integration already
uses).

Bump the integration version to 1.0.2 and clarify the postcode field
label (outward code, e.g. SW1).

Verified end-to-end on Home Assistant 2025.1.4: config flow, options
flow, and all 10 sensors populated from the live API.

Author: jscruz

custom_components/carbon_intensity_uk/config_flow.py

@@ -52,7 +52,7 @@ async def async_step_user(
     @staticmethod
     @callback
     def async_get_options_flow(config_entry):
-        return CarbonIntensityOptionsFlowHandler(config_entry)
+        return CarbonIntensityOptionsFlowHandler()
 
     async def _show_config_form(self, user_input):  # pylint: disable=unused-argument
         """Show the configuration form to edit location data."""
@@ -77,13 +77,15 @@ async def _test_credentials(self, postcode):
 class CarbonIntensityOptionsFlowHandler(config_entries.OptionsFlow):
     """Carbon Intensity UK config flow options handler."""
 
-    def __init__(self, config_entry):
-        """Initialize HACS options flow."""
-        self.config_entry = config_entry
-        self.options = dict(config_entry.options)
+    def __init__(self):
+        """Initialize options flow."""
+        # self.config_entry is provided by the OptionsFlow base class (HA 2024.11+)
+        # and must not be set here: it is a read-only property since HA 2025.12.
+        self.options = {}
 
     async def async_step_init(self, user_input=None):  # pylint: disable=unused-argument
         """Manage the options."""
+        self.options = dict(self.config_entry.options)
         return await self.async_step_user()
 
     async def async_step_user(self, user_input=None):

custom_components/carbon_intensity_uk/const.py

@@ -3,7 +3,7 @@
 NAME = "Carbon Intensity UK"
 DOMAIN = "carbon_intensity_uk"
 DOMAIN_DATA = f"{DOMAIN}_data"
-VERSION = "1.0.1"
+VERSION = "1.0.2"
 
 ISSUE_URL = "https://github.com/jscruz/sensor.carbon_intensity_uk/issues"
 

custom_components/carbon_intensity_uk/manifest.json

@@ -7,6 +7,6 @@
   "documentation": "https://github.com/jscruz/sensor.carbon_intensity_uk",
   "iot_class": "cloud_polling",
   "issue_tracker": "https://github.com/jscruz/sensor.carbon_intensity_uk/issues",
-  "requirements": ["aiohttp", "numpy", "carbon_intensity_uk"],
-  "version": "1.0.1"
+  "requirements": ["carbon_intensity_uk==1.0.1"],
+  "version": "1.0.2"
 }

custom_components/carbon_intensity_uk/translations/en.json

@@ -5,7 +5,7 @@
                 "title": "Carbon Intensity UK",
                 "description": "Enter your UK postcode to get local carbon intensity data.",
                 "data": {
-                    "postcode": "UK Postcode (e.g. SW1)"
+                    "postcode": "UK Postcode or outward code (e.g. SW1)"
                 }
             }
         },

hacs.json

@@ -1,5 +1,5 @@
 {
     "name": "Carbon Intensity UK",
     "hacs": "2.0.0",
-    "homeassistant": "2022.8.0"
+    "homeassistant": "2024.11.0"
 }