feat(settings): add useSettingsConfig composable

src/features/settings/composables/useSettingsConfig.js

@@ -0,0 +1,48 @@
+/*
+Copyright 2026 Seekra
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { ref, readonly } from 'vue';
+import { loadSettingsConfig } from '../utils/settingsParser.js';
+
+const config  = ref(null);
+const error   = ref(null);
+const loading = ref(false);
+
+/**
+ * Provides reactive access to the parsed settings configuration.
+ * The config is loaded once and shared across all consumers.
+ */
+export function useSettingsConfig() {
+    async function load(url = '/settings.json') {
+        loading.value = true;
+        error.value   = null;
+        try {
+            config.value = await loadSettingsConfig(url);
+        } catch (e) {
+            error.value  = e.message;
+            config.value = null;
+        } finally {
+            loading.value = false;
+        }
+    }
+
+    return {
+        config:  readonly(config),
+        error:   readonly(error),
+        loading: readonly(loading),
+        load,
+    };
+}