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/compat/predicate/isFinite.js

@@ -0,0 +1,30 @@
+//#region src/compat/predicate/isFinite.ts
+/**
+* Checks if `value` is a finite number.
+*
+* Acts as a type guard for `number` values — returning `true` only when `value`
+* is of type `number` and finite (not `Infinity`, `-Infinity`, or `NaN`).
+*
+* @param value The value to check.
+* @returns Returns `true` if `value` is a finite number, `false` otherwise.
+*
+* @example
+* ```typescript
+* const value1 = 100;
+* const value2 = Infinity;
+* const value3 = '100';
+*
+* console.log(isFinite(value1)); // true
+* console.log(isFinite(value2)); // false
+* console.log(isFinite(value3)); // false
+*
+* if (isFinite(value1)) {
+*   console.log(value1.toFixed(2));
+* }
+* ```
+*/
+function isFinite(value) {
+	return Number.isFinite(value);
+}
+//#endregion
+exports.isFinite = isFinite;