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-abstract/2016/IsDetachedBuffer.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var $byteLength = require('array-buffer-byte-length');
+
+var isArrayBuffer = require('is-array-buffer');
+
+var availableTypedArrays = require('available-typed-arrays')();
+
+// https://262.ecma-international.org/6.0/#sec-isdetachedbuffer
+
+module.exports = function IsDetachedBuffer(arrayBuffer) {
+	if (!isArrayBuffer(arrayBuffer)) {
+		throw new $TypeError('Assertion failed: `arrayBuffer` must be an Object with an [[ArrayBufferData]] internal slot');
+	}
+	if ($byteLength(arrayBuffer) === 0) {
+		try {
+			new global[availableTypedArrays[0]](arrayBuffer); // eslint-disable-line no-new
+		} catch (error) {
+			return !!error && error.name === 'TypeError';
+		}
+	}
+	return false;
+};