fix: resolve HACS/hassfest CI validation failures

Fixes surfaced by the new validate.yml workflow's first run:
- manifest.json: codeowners entries must be prefixed with "@" to be
  recognized as valid GitHub handles.
- strings.json/translations/en.json: application_credentials.description
  contained a markdown link/raw URL, which hassfest's translation
  validator rejects; reworded to avoid it (full instructions remain in
  README, linked via manifest.json's documentation field).
- __init__.py: added CONFIG_SCHEMA = cv.config_entry_only_config_schema
  to resolve hassfest's warning about integrations with async_setup
  lacking a config schema (this integration isn't configurable via a
  top-level "splitwise:" YAML key).
- hacs.json: removed "domains" and "version" keys, which are no longer
  part of HACS's accepted schema (HACS derives version from GitHub
  releases, not this file); fixed "country" to be a string per schema.
- custom_components/splitwise/brand/: replaced the icon.txt MDI fallback
  (an HA-core-only mechanism, not recognized by HACS's own brands check)
  with real icon.png (256x256) and icon@2x.png (512x512) placeholder
  images, satisfying HACS's brands validation. Swap these for the
  final custom-designed graphic later.

Author: sriramsv

custom_components/splitwise/__init__.py

@@ -5,6 +5,7 @@
 import logging
 from dataclasses import dataclass
 
+import homeassistant.helpers.config_validation as cv
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_PLATFORM, Platform
 from homeassistant.core import HomeAssistant
@@ -16,6 +17,8 @@
 
 _LOGGER = logging.getLogger(__name__)
 
+CONFIG_SCHEMA = cv.config_entry_only_config_schema(DOMAIN)
+
 PLATFORMS = [Platform.SENSOR]
 
 

custom_components/splitwise/brand/icon.png

@@ -4,9 +4,9 @@
     "documentation": "https://github.com/sriramsv/custom_component_splitwise",
     "issue_tracker": "https://github.com/sriramsv/custom_component_splitwise/issues",
     "dependencies": ["application_credentials"],
-    "codeowners": ["sriramsv"],
+    "codeowners": ["@sriramsv"],
     "requirements": ["splitwise==3.0.0"],
     "iot_class": "cloud_polling",
     "config_flow": true,
-    "version": "0.2.7"
+    "version": "0.2.8"
   }

custom_components/splitwise/brand/icon.txt

@@ -25,7 +25,7 @@
     }
   },
   "application_credentials": {
-    "description": "To link your Splitwise account, register an application at the [Splitwise Developer portal](https://secure.splitwise.com/apps). Set the Callback URL to `https://my.home-assistant.io/redirect/oauth`. Splitwise will give you a **Consumer Key** and **Consumer Secret** — enter the Consumer Key in the Client ID field below, and the Consumer Secret in the Client Secret field."
+    "description": "To link your Splitwise account, register an application in the Splitwise Developer portal (see the integration documentation for the exact Callback URL to use). Splitwise will give you a Consumer Key and a Consumer Secret: enter the Consumer Key in the Client ID field below, and the Consumer Secret in the Client Secret field."
   },
   "issues": {
     "deprecated_yaml": {

custom_components/splitwise/brand/icon@2x.png

@@ -25,7 +25,7 @@
     }
   },
   "application_credentials": {
-    "description": "To link your Splitwise account, register an application at the [Splitwise Developer portal](https://secure.splitwise.com/apps). Set the Callback URL to `https://my.home-assistant.io/redirect/oauth`. Splitwise will give you a **Consumer Key** and **Consumer Secret** — enter the Consumer Key in the Client ID field below, and the Consumer Secret in the Client Secret field."
+    "description": "To link your Splitwise account, register an application in the Splitwise Developer portal (see the integration documentation for the exact Callback URL to use). Splitwise will give you a Consumer Key and a Consumer Secret: enter the Consumer Key in the Client ID field below, and the Consumer Secret in the Client Secret field."
   },
   "issues": {
     "deprecated_yaml": {

custom_components/splitwise/manifest.json

@@ -1,7 +1,5 @@
 {
     "name": "Splitwise Sensor",
-    "domains": ["sensor"],
-    "country": ["US"],
-    "version": "0.2.7",
+    "country": "US",
     "render_readme": true
   }