fix: harden admin actions, search, sanitization and repo hygiene

- Split approve/dismiss application workflows with distinct audit logs,
  rate-limited guards and real error logging
- Validate article status/date/id input and stop resetting publishedAt
  on every update
- Validate guild updates (state, forum enums, non-empty name) behind
  rate-limited guard
- Fix scheduled-article publishing (ignore NULL dates, set updatedAt,
  type-safe predicates)
- Harden admin search API (LIKE escaping, query cap, per-user
  rate limit, round-robin result cap) and fix search dialog
  abort/res.ok/loading races
- Lock down HTML sanitizer to an allowlist profile and add XSS tests
- Improve mobile nav accessibility (unique id, dialog role, focus
  management, scroll lock, outside close)
- Log swallowed server errors instead of silent catch blocks
- Remove dead eslint config, drop unused dompurify deps, restore knip
  CI step, add Playwright config with smoke spec

e2e/smoke.spec.ts

@@ -0,0 +1,13 @@
+import { expect, test } from "@playwright/test";
+
+test("health endpoint is reachable", async ({ request }) => {
+	const res = await request.get("/api/health");
+	expect(res.ok()).toBeTruthy();
+	const body = await res.json();
+	expect(body).toHaveProperty("status");
+});
+
+test("homepage renders", async ({ page }) => {
+	await page.goto("/");
+	await expect(page).toHaveTitle(/.+/);
+});