rewrite bot in TypeScript and add locale switching

tests/config.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, test } from "bun:test";
+import { ConfigurationError, loadConfig } from "../src/config.js";
+
+describe("loadConfig", () => {
+  test("keeps http-only mode usable without Telegram credentials", () => {
+    const config = loadConfig({ BOT_MODE: "http-only", DATABASE_URL: ":memory:", QUERY_DURATION: "2" });
+    expect(config.BOT_MODE).toBe("http-only");
+    expect(config.QUERY_DURATION).toBe(2);
+    expect(config.dataDir).toContain("data");
+  });
+
+  test("parses the personal allowlist", () => {
+    const config = loadConfig({ TELEGRAM_BOT_TOKEN: "123:abc", TELEGRAM_ALLOWED_USER_IDS: "42, 7" });
+    expect(config.allowedUserIds).toEqual([42, 7]);
+  });
+
+  test("rejects malformed IDs and incomplete webhook settings", () => {
+    expect(() => loadConfig({ TELEGRAM_BOT_TOKEN: "123:abc", TELEGRAM_ALLOWED_USER_IDS: "42,nope" })).toThrow(
+      ConfigurationError,
+    );
+    expect(() =>
+      loadConfig({ TELEGRAM_BOT_TOKEN: "123:abc", BOT_MODE: "webhook", TELEGRAM_ALLOWED_USER_IDS: "42" }),
+    ).toThrow(ConfigurationError);
+  });
+
+  test("treats empty strings as unset", () => {
+    expect(loadConfig({ BOT_MODE: "http-only", TELEGRAM_BOT_TOKEN: "" }).TELEGRAM_BOT_TOKEN).toBeUndefined();
+  });
+
+  test("parses textual booleans instead of coercing false to true", () => {
+    const config = loadConfig({ BOT_MODE: "http-only", ENABLE_FDS_SLEEP_DETAILS: "false" });
+    expect(config.ENABLE_FDS_SLEEP_DETAILS).toBe(false);
+  });
+});