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/server/exec.d.mts

@@ -0,0 +1,63 @@
+import { SpawnOptions } from "node:child_process";
+
+//#region src/server/exec.d.ts
+interface ExecOptions {
+  signal?: AbortSignal;
+  timeout?: number;
+  stdin?: string;
+  spawnOptions?: SpawnOptions;
+  throwOnNonZeroExitCode?: boolean;
+}
+interface ExecResult {
+  pid: number | undefined;
+  stderr: string;
+  stdout: string;
+  exitCode: number | null;
+}
+/**
+ * Executes a command and captures its output.
+ *
+ * This function spawns a child process, collects its stdout and stderr, and resolves with the
+ * process result when execution finishes. By default, it throws an {@link ExecError} when the
+ * process exits with a non-zero exit code.
+ *
+ * @param _command - The command to execute.
+ * @param args - The arguments passed to the command.
+ * @param options - The options object.
+ * @param options.signal - An optional AbortSignal used to abort the process.
+ * @param options.timeout - An optional timeout in milliseconds. When provided, the
+ * process is aborted after the timeout expires.
+ * @param options.stdin - An optional string written to the process stdin.
+ * @param options.spawnOptions - Additional options forwarded to `child_process.spawn`.
+ * @param options.throwOnNonZeroExitCode - Whether to throw an {@link ExecError} when the
+ * process exits with a non-zero exit code. Defaults to `true`.
+ * @returns A promise that resolves with the process result.
+ * @throws {ExecError} Throws when `throwOnNonZeroExitCode` is enabled and the process exits with a
+ * non-zero exit code.
+ *
+ * @example
+ * const result = await exec('echo', ['hello']);
+ *
+ * console.log(result.stdout.trim());
+ * // => 'hello'
+ *
+ * @example
+ * const result = await exec('git', ['diff', '--quiet'], {
+ *   throwOnNonZeroExitCode: false,
+ * });
+ *
+ * console.log(result.exitCode);
+ * // => 1 when there are changes
+ */
+declare function exec(_command: string, args?: string[], options?: ExecOptions): Promise<ExecResult>;
+/**
+ * Represents an error thrown when a process exits with a non-zero exit code.
+ *
+ * @param result - The captured process result.
+ */
+declare class ExecError extends Error {
+  readonly result: ExecResult;
+  constructor(result: ExecResult);
+}
+//#endregion
+export { ExecError, exec };