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/lucide-react/dist/esm/icons/heading-4.js

@@ -0,0 +1,19 @@
+/**
+ * @license lucide-react v0.468.0 - ISC
+ *
+ * This source code is licensed under the ISC license.
+ * See the LICENSE file in the root directory of this source tree.
+ */
+
+import createLucideIcon from '../createLucideIcon.js';
+
+const Heading4 = createLucideIcon("Heading4", [
+  ["path", { d: "M12 18V6", key: "zqpxq5" }],
+  ["path", { d: "M17 10v3a1 1 0 0 0 1 1h3", key: "tj5zdr" }],
+  ["path", { d: "M21 10v8", key: "1kdml4" }],
+  ["path", { d: "M4 12h8", key: "17cfdx" }],
+  ["path", { d: "M4 18V6", key: "1rz3zl" }]
+]);
+
+export { Heading4 as default };
+//# sourceMappingURL=heading-4.js.map