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/redux/src/utils/kindOf.ts

@@ -0,0 +1,70 @@
+// Inlined / shortened version of `kindOf` from https://github.com/jonschlinkert/kind-of
+export function miniKindOf(val: any): string {
+  if (val === void 0) return 'undefined'
+  if (val === null) return 'null'
+
+  const type = typeof val
+  switch (type) {
+    case 'boolean':
+    case 'string':
+    case 'number':
+    case 'symbol':
+    case 'function': {
+      return type
+    }
+  }
+
+  if (Array.isArray(val)) return 'array'
+  if (isDate(val)) return 'date'
+  if (isError(val)) return 'error'
+
+  const constructorName = ctorName(val)
+  switch (constructorName) {
+    case 'Symbol':
+    case 'Promise':
+    case 'WeakMap':
+    case 'WeakSet':
+    case 'Map':
+    case 'Set':
+      return constructorName
+  }
+
+  // other
+  return Object.prototype.toString
+    .call(val)
+    .slice(8, -1)
+    .toLowerCase()
+    .replace(/\s/g, '')
+}
+
+function ctorName(val: any): string | null {
+  return typeof val.constructor === 'function' ? val.constructor.name : null
+}
+
+function isError(val: any) {
+  return (
+    val instanceof Error ||
+    (typeof val.message === 'string' &&
+      val.constructor &&
+      typeof val.constructor.stackTraceLimit === 'number')
+  )
+}
+
+function isDate(val: any) {
+  if (val instanceof Date) return true
+  return (
+    typeof val.toDateString === 'function' &&
+    typeof val.getDate === 'function' &&
+    typeof val.setDate === 'function'
+  )
+}
+
+export function kindOf(val: any) {
+  let typeOfVal: string = typeof val
+
+  if (process.env.NODE_ENV !== 'production') {
+    typeOfVal = miniKindOf(val)
+  }
+
+  return typeOfVal
+}