Add settings page for managing forecasting API key and URL via UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/es-toolkit/dist/map/keyBy.js

@@ -0,0 +1,39 @@
+//#region src/map/keyBy.ts
+/**
+* Maps each entry of a Map based on a provided key-generating function.
+*
+* This function takes a Map and a function that generates a key from each value-key pair.
+* It returns a new Map where the keys are generated by the key function and the values are
+* the corresponding values from the original map. If multiple entries produce the same key,
+* the last value encountered will be used.
+*
+* @template K - The type of keys in the original Map.
+* @template V - The type of values in the original Map.
+* @template K2 - The type of keys to produce in the returned Map.
+* @param map - The map of entries to be mapped.
+* @param getKeyFromEntry - A function that generates a key from a value-key pair.
+* @returns A Map where the generated keys are mapped to each entry's value.
+*
+* @example
+* const map = new Map([
+*   ['x', { type: 'fruit', name: 'apple' }],
+*   ['y', { type: 'fruit', name: 'banana' }],
+*   ['z', { type: 'vegetable', name: 'carrot' }]
+* ]);
+* const result = keyBy(map, item => item.type);
+* // result will be:
+* // Map(2) {
+* //   'fruit' => { type: 'fruit', name: 'banana' },
+* //   'vegetable' => { type: 'vegetable', name: 'carrot' }
+* // }
+*/
+function keyBy(map, getKeyFromEntry) {
+	const result = /* @__PURE__ */ new Map();
+	for (const [key, value] of map) {
+		const newKey = getKeyFromEntry(value, key, map);
+		result.set(newKey, value);
+	}
+	return result;
+}
+//#endregion
+exports.keyBy = keyBy;