refactor: full codebase overhaul — dead code removal, env validation, logger migration, date consolidation, Prisma schema cleanup, button consistency, useEffect deps, test coverage

- env.ts: added 10 missing Zod-validated env vars (imager, paypal currency, argon2/bcrypt params)
- Migrated 6 modules from process.env to validated env.* (auth, proxy-auth, paypal, password, redis, imager, moderation, alert, logger)
- Replaced console.warn/error with pino logger in 9 server-side modules
- Removed 50+ dead exports (SWF wrappers, coalesceHotelName, signIn, isStaff re-export, formatTimestamp, Skeleton/SkeletonCard, 4 unused housekeeping sections)
- Consolidated date formatting: 28 files migrated to shared formatDate() from @/lib/format-date
- Wired 4 radio/settings API routes through cached siteSettings service instead of raw Prisma queries
- Added getMany()/getAll() helpers to SiteSettings service
- Removed 88 dead Prisma model definitions (schema 2763→1846 lines)
- Created admin action-helper.ts with wrapAction() for standardized error handling
- Fixed useEffect dependency arrays in 4 data-heavy components
- Replaced raw btn CSS classes with shadcn Button component across admin pages
- Stripped dead i18n namespaces (common, pages.client) from all 22 translation files
- Removed 2 dead scripts (create-release.sh, check-local-imports.ts)
- Fixed knip.json configuration
- Added 7 new test suites: format-date, paypal, moderation, alert, webhook, action-helper, and fixed password.test.ts for env mocking
- All 358 tests passing across 72 test files
- TypeScript: 0 errors

src/lib/services/webhook.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it, vi } from "vitest";
+
+const findUnique = vi.hoisted(() => vi.fn());
+const mockFetch = vi.hoisted(() => vi.fn().mockResolvedValue({ ok: true }));
+
+vi.mock("@/lib/prisma", () => ({
+	prisma: { websiteSetting: { findUnique } },
+}));
+
+vi.mock("@/env", () => ({
+	env: {
+		DISCORD_WEBHOOK_URL: "https://discord.com/api/webhooks/test",
+		TELEGRAM_BOT_TOKEN: "",
+		TELEGRAM_CHAT_ID: "",
+	},
+}));
+
+global.fetch = mockFetch;
+
+import { notify } from "./webhook";
+
+describe("webhook", () => {
+	it("sends a Discord notification when webhook URL is configured", async () => {
+		findUnique.mockResolvedValue(null);
+		notify({
+			action: "ban",
+			actor: "admin",
+			target: "user1",
+			targetId: 123,
+		});
+		await vi.waitFor(() => {
+			expect(mockFetch).toHaveBeenCalledWith(
+				"https://discord.com/api/webhooks/test",
+				expect.objectContaining({
+					method: "POST",
+					headers: { "Content-Type": "application/json" },
+				}),
+			);
+		});
+	});
+
+	it("does not throw when fetch fails", async () => {
+		mockFetch.mockRejectedValueOnce(new Error("network error"));
+		findUnique.mockResolvedValue(null);
+		expect(() =>
+			notify({ action: "ban", actor: "admin", target: "user1" }),
+		).not.toThrow();
+		await vi.waitFor(() => {
+			expect(mockFetch).toHaveBeenCalled();
+		});
+	});
+});