diff --git a/src/actions/admin-radio-extra.ts b/src/actions/admin-radio-extra.ts
index ca8ec201..9dbca337 100644
--- a/src/actions/admin-radio-extra.ts
+++ b/src/actions/admin-radio-extra.ts
@@ -2,11 +2,12 @@
 
 import { eq } from "drizzle-orm";
 import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+import { executeLegacyHotelMutation } from "@/features/housekeeping/domains/hotel/services/mutations";
 import { requirePermission } from "@/lib/admin/guard";
-import { db, RadioBanners, RadioRanks, WebsiteSetting } from "@/lib/db";
+import { db, RadioBanners, RadioRanks } from "@/lib/db";
 import { logger } from "@/lib/logger";
 import { PERMS } from "@/lib/permissions";
-import { siteSettings } from "@/lib/services/site-settings";
 
 // ── Helpers ────────────────────────────────────────────────────────────────
 
@@ -39,22 +40,32 @@ function bool(raw: FormDataEntryValue | null): boolean {
  * siteSettings cache so the public radio pages pick the change up immediately.
  */
 export async function saveRadioSetting(formData: FormData): Promise<void> {
-	await requirePermission(PERMS.RADIO_EDIT);
-	const key = str(formData.get("key")).trim().slice(0, 255);
+	const staff = await requirePermission(PERMS.RADIO_EDIT);
+	const key = str(formData.get("key")).trim();
 	const value = str(formData.get("value"));
-	const comment = str(formData.get("comment")).trim().slice(0, 255);
-	if (!key) return;
+	const comment = str(formData.get("comment")).trim();
 
+	let partial = false;
 	try {
-		await db
-			.insert(WebsiteSetting)
-			.values({ key, value, comment: comment || null })
-			.onDuplicateKeyUpdate({ set: { value } });
-		siteSettings.reload();
-	} catch (err) {
-		logger.error("Failed to save radio setting", { err, key });
+		const snapshot = await executeLegacyHotelMutation(
+			staff,
+			"radio.settings.save-one",
+			{ key, value, comment },
+		);
+		partial = snapshot.completion?.cache === "unavailable";
+	} catch {
+		return redirect("/admin/radio/settings?error=1");
 	}
-	revalidatePath("/admin/radio/settings");
+	try {
+		revalidatePath("/admin/radio/settings");
+	} catch {
+		partial = true;
+	}
+	redirect(
+		partial
+			? "/admin/radio/settings?partial=1"
+			: "/admin/radio/settings?saved=1",
+	);
 }
 
 /**
@@ -63,29 +74,32 @@ export async function saveRadioSetting(formData: FormData): Promise<void> {
  * only touch those (and never wipe unrelated settings).
  */
 export async function saveRadioSettings(formData: FormData): Promise<void> {
-	await requirePermission(PERMS.RADIO_EDIT);
+	const staff = await requirePermission(PERMS.RADIO_EDIT);
 	const keysRaw = str(formData.get("__keys"));
-	const keys = keysRaw
-		.split(",")
-		.map((k) => k.trim())
-		.filter((k) => k.startsWith("radio_") || k.startsWith("auto_dj_"));
-	if (keys.length === 0) return;
+	const keys = keysRaw.split(",").map((key) => key.trim());
+	const entries = keys.map((key) => ({ key, value: str(formData.get(key)) }));
 
+	let partial = false;
 	try {
-		await Promise.all(
-			keys.map((key) => {
-				const value = str(formData.get(key));
-				return db
-					.insert(WebsiteSetting)
-					.values({ key, value, comment: null })
-					.onDuplicateKeyUpdate({ set: { value } });
-			}),
+		const snapshot = await executeLegacyHotelMutation(
+			staff,
+			"radio.settings.save-many",
+			{ entries },
 		);
-		siteSettings.reload();
-	} catch (err) {
-		logger.error("Failed to bulk-save radio settings", { err, keys });
+		partial = snapshot.completion?.cache === "unavailable";
+	} catch {
+		return redirect("/admin/radio/settings?error=1");
 	}
-	revalidatePath("/admin/radio/settings");
+	try {
+		revalidatePath("/admin/radio/settings");
+	} catch {
+		partial = true;
+	}
+	redirect(
+		partial
+			? "/admin/radio/settings?partial=1"
+			: "/admin/radio/settings?saved=1",
+	);
 }
 
 // ── Radio banners CRUD (radio_banners) ─────────────────────────────────────
diff --git a/src/actions/admin-radio-points.ts b/src/actions/admin-radio-points.ts
index 44d9feba..e1c23ec4 100644
--- a/src/actions/admin-radio-points.ts
+++ b/src/actions/admin-radio-points.ts
@@ -2,93 +2,41 @@
 
 import { revalidatePath } from "next/cache";
 import { redirect } from "next/navigation";
+import { executeLegacyHotelMutation } from "@/features/housekeeping/domains/hotel/services/mutations";
 import { requirePermission } from "@/lib/admin/guard";
-import { db, WebsiteSetting } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
-import { siteSettings } from "@/lib/services/site-settings";
-import { logStaffActivity } from "@/lib/services/staff-activity";
-
-// Radio listener-points settings (website_settings radio_points_* keys).
-// Mirrors AtomCMS's RadioPoints Filament page: key/value rows in
-// website_settings that reward listeners for time spent on the radio. Booleans
-// use the string '0' / '1'. Busts the siteSettings cache so the public radio
-// pages pick the change up immediately.
-
-const POINTS_KEYS = [
-	"radio_points_enabled",
-	"radio_points_per_minute",
-	"radio_points_currency",
-	"radio_points_max_per_day",
-	"radio_points_min_listeners",
-] as const;
-
-const ALLOWED_CURRENCIES = new Set([
-	"credits",
-	"duckets",
-	"diamonds",
-	"points",
-]);
 
 function str(raw: FormDataEntryValue | null): string {
 	return typeof raw === "string" ? raw : "";
 }
 
-/** Checkbox/select truthiness → '1' / '0'. */
-function boolStr(raw: FormDataEntryValue | null): "0" | "1" {
-	const v = str(raw).trim().toLowerCase();
-	return v === "1" || v === "true" || v === "on" ? "1" : "0";
-}
-
-/** Clamp a form value to a non-negative integer string (defaulting to 0). */
-function intStr(raw: FormDataEntryValue | null): string {
-	const n = Number(str(raw).trim());
-	if (!Number.isFinite(n) || n < 0) return "0";
-	return String(Math.floor(n));
-}
-
 export async function savePoints(formData: FormData): Promise<void> {
 	const staff = await requirePermission(PERMS.RADIO_EDIT);
-
-	const currencyRaw = str(formData.get("radio_points_currency"))
-		.trim()
-		.toLowerCase();
-	const currency = ALLOWED_CURRENCIES.has(currencyRaw)
-		? currencyRaw
-		: "credits";
-
-	const values: Record<(typeof POINTS_KEYS)[number], string> = {
-		radio_points_enabled: boolStr(formData.get("radio_points_enabled")),
-		radio_points_per_minute: intStr(formData.get("radio_points_per_minute")),
-		radio_points_currency: currency,
-		radio_points_max_per_day: intStr(formData.get("radio_points_max_per_day")),
-		radio_points_min_listeners: intStr(
-			formData.get("radio_points_min_listeners"),
-		),
+	const values = {
+		radio_points_enabled: str(formData.get("radio_points_enabled")),
+		radio_points_per_minute: str(formData.get("radio_points_per_minute")),
+		radio_points_currency: str(formData.get("radio_points_currency")),
+		radio_points_max_per_day: str(formData.get("radio_points_max_per_day")),
+		radio_points_min_listeners: str(formData.get("radio_points_min_listeners")),
 	};
 
+	let partial = false;
 	try {
-		await Promise.all(
-			POINTS_KEYS.map((key) =>
-				db
-					.insert(WebsiteSetting)
-					// eslint-disable-next-line security/detect-object-injection -- key from POINTS_KEYS const
-					.values({ key, value: values[key], comment: "Radio points" })
-					.onDuplicateKeyUpdate({
-						// eslint-disable-next-line security/detect-object-injection -- key from POINTS_KEYS const
-						set: { value: values[key] },
-					}),
-			),
+		const snapshot = await executeLegacyHotelMutation(
+			staff,
+			"radio.points.save",
+			values,
 		);
-		siteSettings.reload();
-		await logStaffActivity({
-			staffId: staff.id,
-			action: "radio_points_update",
-			description: `Updated radio listener-points settings (enabled=${values.radio_points_enabled}, ${values.radio_points_per_minute}/min ${currency})`,
-		});
+		partial = snapshot.completion?.cache === "unavailable";
 	} catch {
-		// DB unavailable — fail soft so the action does not throw.
+		return redirect("/admin/radio/points?error=1");
 	}
-
-	revalidatePath("/admin/radio/points");
-	redirect("/admin/radio/points?saved=1");
+	try {
+		revalidatePath("/admin/radio/points");
+	} catch {
+		partial = true;
+	}
+	redirect(
+		partial ? "/admin/radio/points?partial=1" : "/admin/radio/points?saved=1",
+	);
 }
diff --git a/src/actions/admin-radio-settings.test.ts b/src/actions/admin-radio-settings.test.ts
new file mode 100644
index 00000000..f524caf5
--- /dev/null
+++ b/src/actions/admin-radio-settings.test.ts
@@ -0,0 +1,145 @@
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { executeLegacyHotelMutation } from "@/features/housekeeping/domains/hotel/services/mutations";
+
+const mocks = vi.hoisted(() => ({
+	execute: vi.fn(),
+	revalidate: vi.fn(),
+	redirect: vi.fn(),
+}));
+
+vi.mock("next/cache", () => ({ revalidatePath: mocks.revalidate }));
+vi.mock("next/navigation", () => ({ redirect: mocks.redirect }));
+vi.mock("@/lib/permissions", async () => import("@/lib/permission-slugs"));
+vi.mock("@/lib/admin/guard", () => ({
+	requirePermission: async () => ({ id: 42, rank: 7, username: "operator" }),
+}));
+vi.mock("@/features/housekeeping/domains/hotel/services/mutations", () => ({
+	executeLegacyHotelMutation: mocks.execute,
+}));
+
+import { saveRadioSetting, saveRadioSettings } from "./admin-radio-extra";
+import { savePoints } from "./admin-radio-points";
+
+function form(entries: Record<string, string>): FormData {
+	const data = new FormData();
+	for (const [key, value] of Object.entries(entries)) data.set(key, value);
+	return data;
+}
+
+beforeEach(() => {
+	vi.clearAllMocks();
+	mocks.execute.mockResolvedValue({ before: null, after: { saved: true } });
+});
+
+describe("legacy radio setting actions", () => {
+	it("delegates one setting with its useful metadata", async () => {
+		await saveRadioSetting(
+			form({ key: "radio_name", value: "Test Radio", comment: "Display name" }),
+		);
+
+		expect(executeLegacyHotelMutation).toHaveBeenCalledWith(
+			expect.objectContaining({ id: 42 }),
+			"radio.settings.save-one",
+			{ key: "radio_name", value: "Test Radio", comment: "Display name" },
+		);
+		expect(revalidatePath).toHaveBeenCalledWith("/admin/radio/settings");
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/settings?saved=1");
+	});
+
+	it("passes forged bulk keys to strict Hotel validation instead of silently filtering them", async () => {
+		mocks.execute.mockRejectedValueOnce(new Error("validation"));
+
+		await saveRadioSettings(
+			form({
+				__keys: "radio_name,cms_secret",
+				radio_name: "Test Radio",
+				cms_secret: "must-not-write",
+			}),
+		);
+
+		expect(executeLegacyHotelMutation).toHaveBeenCalledWith(
+			expect.objectContaining({ id: 42 }),
+			"radio.settings.save-many",
+			{
+				entries: [
+					{ key: "radio_name", value: "Test Radio" },
+					{ key: "cms_secret", value: "must-not-write" },
+				],
+			},
+		);
+		expect(revalidatePath).not.toHaveBeenCalled();
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/settings?error=1");
+	});
+
+	it("submits all 102 curated-size settings in one bounded Hotel operation", async () => {
+		const keys = Array.from(
+			{ length: 102 },
+			(_, index) => `radio_key_${index}`,
+		);
+		const data = form({
+			__keys: keys.join(","),
+			...Object.fromEntries(keys.map((key) => [key, `value-${key}`])),
+		});
+
+		await saveRadioSettings(data);
+
+		expect(executeLegacyHotelMutation).toHaveBeenCalledWith(
+			expect.objectContaining({ id: 42 }),
+			"radio.settings.save-many",
+			{
+				entries: keys.map((key) => ({ key, value: `value-${key}` })),
+			},
+		);
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/settings?saved=1");
+	});
+
+	it("shows a partial notice after a committed write whose cache invalidation failed", async () => {
+		mocks.execute.mockResolvedValueOnce({
+			before: null,
+			after: { key: "radio_name" },
+			completion: {
+				status: "partial",
+				external: "not-required",
+				audit: "persisted",
+				cache: "unavailable",
+			},
+		});
+
+		await saveRadioSetting(form({ key: "radio_name", value: "Test" }));
+
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/settings?partial=1");
+	});
+});
+
+describe("legacy radio points action", () => {
+	const validPoints = {
+		radio_points_enabled: "1",
+		radio_points_per_minute: "2",
+		radio_points_currency: "duckets",
+		radio_points_max_per_day: "200",
+		radio_points_min_listeners: "3",
+	};
+
+	it("delegates the complete points form to the Hotel operation", async () => {
+		await savePoints(form(validPoints));
+
+		expect(executeLegacyHotelMutation).toHaveBeenCalledWith(
+			expect.objectContaining({ id: 42 }),
+			"radio.points.save",
+			validPoints,
+		);
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/points?saved=1");
+	});
+
+	it("never reports saved after a failed write", async () => {
+		mocks.execute.mockRejectedValueOnce(new Error("database unavailable"));
+
+		await savePoints(form(validPoints));
+
+		expect(revalidatePath).not.toHaveBeenCalled();
+		expect(redirect).toHaveBeenCalledTimes(1);
+		expect(redirect).toHaveBeenCalledWith("/admin/radio/points?error=1");
+	});
+});
diff --git a/src/app/admin/radio/points/page.tsx b/src/app/admin/radio/points/page.tsx
index 8247f2a9..56f17fdd 100644
--- a/src/app/admin/radio/points/page.tsx
+++ b/src/app/admin/radio/points/page.tsx
@@ -19,11 +19,23 @@ const CURRENCIES = ["credits", "duckets", "diamonds", "points"] as const;
 export default async function AdminRadioPointsPage({
 	searchParams,
 }: {
-	searchParams: Promise<{ saved?: string }>;
+	searchParams: Promise<{
+		saved?: string;
+		partial?: string;
+		error?: string;
+	}>;
 }) {
 	const t = await getTranslations("pages.admin.radio");
 
-	const { saved } = await searchParams;
+	const { saved, partial, error } = await searchParams;
+	const notice =
+		error === "1"
+			? "Radio points settings were not saved. Check the submitted fields and try again."
+			: partial === "1"
+				? "Radio points settings were saved, but cached data could not be refreshed. Refresh the page before saving again."
+				: saved === "1"
+					? t("pointsForm.saved")
+					: null;
 
 	const values = {
 		radio_points_enabled: await siteSettings
@@ -61,12 +73,10 @@ export default async function AdminRadioPointsPage({
 	return (
 		<main>
 			<section className="mt-6">
-				{saved === "1" ? (
-					<p>
-						<span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--admin-success-subtle)] text-[var(--admin-text)]">
-							{t("pointsForm.saved")}
-						</span>
-					</p>
+				{notice ? (
+					<div className="admin-card mb-6">
+						<p className="text-sm m-0">{notice}</p>
+					</div>
 				) : null}
 
 				<div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
diff --git a/src/app/admin/radio/settings/page.tsx b/src/app/admin/radio/settings/page.tsx
index c8e80d76..3d9987f5 100644
--- a/src/app/admin/radio/settings/page.tsx
+++ b/src/app/admin/radio/settings/page.tsx
@@ -356,8 +356,25 @@ const GROUPS: Group[] = [
 
 const CURATED_KEYS = new Set(GROUPS.flatMap((g) => g.fields.map((f) => f.key)));
 
-export default async function AdminRadioSettingsPage() {
+export default async function AdminRadioSettingsPage({
+	searchParams,
+}: {
+	searchParams: Promise<{
+		saved?: string;
+		partial?: string;
+		error?: string;
+	}>;
+}) {
 	const t = await getTranslations("pages.admin.radio");
+	const noticeParams = await searchParams;
+	const notice =
+		noticeParams.error === "1"
+			? "Radio settings were not saved. Check the submitted fields and try again."
+			: noticeParams.partial === "1"
+				? "Radio settings were saved, but cached data could not be refreshed. Refresh the page before saving again."
+				: noticeParams.saved === "1"
+					? "Radio settings saved."
+					: null;
 
 	let values: Map<string, string> = new Map();
 	let dbError = false;
@@ -398,6 +415,11 @@ export default async function AdminRadioSettingsPage() {
 
 	return (
 		<main>
+			{notice ? (
+				<div className="admin-card mb-6">
+					<p className="text-sm m-0">{notice}</p>
+				</div>
+			) : null}
 			{dbError ? (
 				<div className="admin-card mb-6">
 					<p className="text-xs theme-text-muted dark:theme-text-muted m-0">
diff --git a/src/features/housekeeping/backend-audit-integrity.test.ts b/src/features/housekeeping/backend-audit-integrity.test.ts
index a671bf96..cf631269 100644
--- a/src/features/housekeeping/backend-audit-integrity.test.ts
+++ b/src/features/housekeeping/backend-audit-integrity.test.ts
@@ -37,6 +37,7 @@ describe("Backend audit reason integrity", () => {
 					before: null,
 					after: { dispatched: true },
 				}),
+				invalidateSiteSettings: async () => ({ invalidated: true }),
 			}),
 			async () => capability,
 		);
diff --git a/src/features/housekeeping/domains/hotel/services/mutations-production.test.ts b/src/features/housekeeping/domains/hotel/services/mutations-production.test.ts
index 596cc54b..03168694 100644
--- a/src/features/housekeeping/domains/hotel/services/mutations-production.test.ts
+++ b/src/features/housekeeping/domains/hotel/services/mutations-production.test.ts
@@ -23,6 +23,12 @@ const context = {
 
 function dependencies() {
 	const transactionToken = { transaction: true };
+	const invalidateSiteSettings = vi.fn(
+		async (): Promise<{
+			invalidated: boolean;
+			redis: "invalidated" | "unavailable";
+		}> => ({ invalidated: true, redis: "invalidated" }),
+	);
 	const writeAudit = vi.fn(
 		async (_entry: AuditEntry, _transaction?: unknown) => undefined,
 	);
@@ -36,10 +42,12 @@ function dependencies() {
 		writeAudit,
 		executeOperation,
 		transaction,
+		invalidateSiteSettings,
 		adapter: createHotelProductionMutationAdapter({
 			transaction,
 			writeAudit,
 			executeOperation,
+			invalidateSiteSettings,
 		}),
 	};
 }
@@ -121,6 +129,78 @@ describe("Hotel production mutation adapter", () => {
 		);
 	});
 
+	it.each([
+		"radio.settings.save-one",
+		"radio.settings.save-many",
+		"radio.points.save",
+	] as const)(
+		"invalidates settings only after committed %s",
+		async (operation) => {
+			const deps = dependencies();
+			const events: string[] = [];
+			deps.executeOperation.mockImplementation(async (currentOperation) => {
+				events.push("write");
+				return {
+					before: { operation: currentOperation, state: "before" },
+					after: { operation: currentOperation, state: "after" },
+				};
+			});
+			deps.writeAudit.mockImplementation(async () => {
+				events.push("audit");
+			});
+			deps.transaction.mockImplementation(async (run) => {
+				const result = await run(deps.transactionToken);
+				events.push("commit");
+				return result;
+			});
+			deps.invalidateSiteSettings.mockImplementation(async () => {
+				events.push("invalidate");
+				return { invalidated: true, redis: "invalidated" };
+			});
+
+			await deps.adapter.execute(operation, {}, context);
+
+			expect(events).toEqual(["write", "audit", "commit", "invalidate"]);
+		},
+	);
+
+	it("does not invalidate settings when the radio transaction rolls back", async () => {
+		const deps = dependencies();
+		deps.writeAudit.mockRejectedValueOnce(new Error("audit unavailable"));
+
+		await expect(
+			deps.adapter.execute("radio.settings.save-one", {}, context),
+		).rejects.toThrow("audit unavailable");
+
+		expect(deps.invalidateSiteSettings).not.toHaveBeenCalled();
+	});
+
+	it("reports cache invalidation failure as partial after the radio write commits", async () => {
+		const deps = dependencies();
+		deps.invalidateSiteSettings.mockResolvedValueOnce({
+			invalidated: false,
+			redis: "unavailable",
+		});
+
+		const result = await deps.adapter.execute(
+			"radio.settings.save-many",
+			{},
+			context,
+		);
+
+		expect(result).toMatchObject({
+			after: { operation: "radio.settings.save-many" },
+			completion: {
+				status: "partial",
+				external: "not-required",
+				audit: "persisted",
+				cache: "unavailable",
+			},
+		});
+		expect(deps.transaction).toHaveBeenCalledTimes(1);
+		expect(deps.executeOperation).toHaveBeenCalledTimes(1);
+	});
+
 	it("persists intent and outcome around RCON operations", async () => {
 		const deps = dependencies();
 		await deps.adapter.execute(
diff --git a/src/features/housekeeping/domains/hotel/services/mutations-production.ts b/src/features/housekeeping/domains/hotel/services/mutations-production.ts
index d283e7c9..6587b314 100644
--- a/src/features/housekeeping/domains/hotel/services/mutations-production.ts
+++ b/src/features/housekeeping/domains/hotel/services/mutations-production.ts
@@ -15,6 +15,12 @@ export const HOTEL_EXTERNAL_OPERATIONS = [
 	"room.runtime",
 ] as const satisfies readonly HotelMutationOperation[];
 
+const SITE_SETTINGS_OPERATIONS = new Set<HotelMutationOperation>([
+	"radio.settings.save-one",
+	"radio.settings.save-many",
+	"radio.points.save",
+]);
+
 type TransactionToken = unknown;
 
 export interface HotelProductionMutationDependencies {
@@ -28,6 +34,7 @@ export interface HotelProductionMutationDependencies {
 		context: HotelMutationContext,
 		transaction?: TransactionToken,
 	): Promise<HotelMutationSnapshot>;
+	invalidateSiteSettings(): Promise<{ readonly invalidated: boolean }>;
 }
 
 function auditEntry(
@@ -55,7 +62,7 @@ export function createHotelProductionMutationAdapter(
 	return {
 		async execute(operation, input, context) {
 			if (operation !== "room.runtime") {
-				return dependencies.transaction(async (transaction) => {
+				const snapshot = await dependencies.transaction(async (transaction) => {
 					const snapshot = await dependencies.executeOperation(
 						operation,
 						input,
@@ -68,6 +75,22 @@ export function createHotelProductionMutationAdapter(
 					);
 					return snapshot;
 				});
+				if (!SITE_SETTINGS_OPERATIONS.has(operation)) return snapshot;
+				try {
+					const invalidation = await dependencies.invalidateSiteSettings();
+					if (invalidation.invalidated) return snapshot;
+				} catch {
+					// The transaction is already committed; expose partial completion.
+				}
+				return {
+					...snapshot,
+					completion: {
+						status: "partial",
+						external: "not-required",
+						audit: "persisted",
+						cache: "unavailable",
+					},
+				};
 			}
 
 			await dependencies.writeAudit(auditEntry(operation, context, "intent"));
@@ -128,4 +151,8 @@ export const hotelProductionMutationAdapter =
 				transaction,
 			);
 		},
+		async invalidateSiteSettings() {
+			const { siteSettings } = await import("@/lib/services/site-settings");
+			return siteSettings.reload();
+		},
 	});
diff --git a/src/features/housekeeping/domains/hotel/services/mutations-runtime-radio.test.ts b/src/features/housekeeping/domains/hotel/services/mutations-runtime-radio.test.ts
new file mode 100644
index 00000000..14d5924e
--- /dev/null
+++ b/src/features/housekeeping/domains/hotel/services/mutations-runtime-radio.test.ts
@@ -0,0 +1,165 @@
+import type { SQL } from "drizzle-orm";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { HousekeepingCapabilityContext } from "../../../foundation/contracts";
+import { HotelMutationFailure } from "./mutations";
+
+const state = vi.hoisted(() => ({
+	rows: [] as Array<Record<string, unknown>>,
+	writes: [] as Array<Record<string, unknown>>,
+}));
+
+vi.mock("@/lib/db", async () => {
+	const schema = await import("@/db/schema");
+	const database = {
+		select: vi.fn(() => {
+			const query = {
+				from: vi.fn(() => query),
+				where: vi.fn((_condition: SQL | undefined) => {
+					const result = Promise.resolve(state.rows) as Promise<
+						Array<Record<string, unknown>>
+					> & {
+						limit: (count: number) => Promise<Array<Record<string, unknown>>>;
+					};
+					result.limit = vi.fn(() => result);
+					return result;
+				}),
+			};
+			return query;
+		}),
+		insert: vi.fn(() => ({
+			values: (values: Record<string, unknown>) => ({
+				onDuplicateKeyUpdate: async () => {
+					state.writes.push(values);
+				},
+			}),
+		})),
+	};
+	return { ...schema, db: database };
+});
+
+import { executeHotelMutationOperation } from "./mutations-runtime";
+
+const capability: HousekeepingCapabilityContext = {
+	actor: { id: 42, username: "operator", rank: 7 },
+	isSuperAdmin: false,
+	has: () => true,
+	hasAny: () => true,
+	hasAll: () => true,
+};
+const context = {
+	capability,
+	correlationId: "radio-runtime",
+	legacy: true,
+};
+
+beforeEach(() => {
+	state.rows = [];
+	state.writes = [];
+});
+
+describe("Hotel radio settings runtime", () => {
+	it("rejects an unrelated setting key before any write", async () => {
+		await expect(
+			executeHotelMutationOperation(
+				"radio.settings.save-one",
+				{ key: "cms_secret", value: "private" },
+				context,
+			),
+		).rejects.toBeInstanceOf(HotelMutationFailure);
+		expect(state.writes).toEqual([]);
+	});
+
+	it("rejects duplicate and invalid bulk entries atomically", async () => {
+		for (const entries of [
+			[
+				{ key: "radio_name", value: "one" },
+				{ key: "radio_name", value: "two" },
+			],
+			[
+				{ key: "radio_name", value: "one" },
+				{ key: "site_name", value: "forged" },
+			],
+		]) {
+			await expect(
+				executeHotelMutationOperation(
+					"radio.settings.save-many",
+					{ entries },
+					context,
+				),
+			).rejects.toBeInstanceOf(HotelMutationFailure);
+			expect(state.writes).toEqual([]);
+		}
+	});
+
+	it("accepts the complete 102-entry curated form within the 500-entry bound", async () => {
+		const entries = Array.from({ length: 102 }, (_, index) => ({
+			key: `radio_curated_${index}`,
+			value: `value-${index}`,
+		}));
+
+		await executeHotelMutationOperation(
+			"radio.settings.save-many",
+			{ entries },
+			context,
+		);
+
+		expect(state.writes).toHaveLength(102);
+	});
+
+	it("rejects a bulk request above 500 entries", async () => {
+		const entries = Array.from({ length: 501 }, (_, index) => ({
+			key: `radio_setting_${index}`,
+			value: "value",
+		}));
+
+		await expect(
+			executeHotelMutationOperation(
+				"radio.settings.save-many",
+				{ entries },
+				context,
+			),
+		).rejects.toBeInstanceOf(HotelMutationFailure);
+		expect(state.writes).toEqual([]);
+	});
+
+	it.each([
+		[
+			"radio.settings.save-one" as const,
+			{ key: "radio_stream_url", value: "https://private.example/stream" },
+		],
+		[
+			"radio.settings.save-many" as const,
+			{
+				entries: [{ key: "radio_name", value: "private station name" }],
+			},
+		],
+		[
+			"radio.points.save" as const,
+			{
+				radio_points_enabled: "1",
+				radio_points_per_minute: "17",
+				radio_points_currency: "credits",
+				radio_points_max_per_day: "34",
+				radio_points_min_listeners: "2",
+			},
+		],
+	])(
+		"does not expose private values in %s audit snapshots",
+		async (operation, input) => {
+			const snapshot = await executeHotelMutationOperation(
+				operation,
+				input,
+				context,
+			);
+			const serialized = JSON.stringify(snapshot);
+			for (const privateValue of [
+				"https://private.example/stream",
+				"private station name",
+				"17",
+				"34",
+			]) {
+				expect(serialized).not.toContain(privateValue);
+			}
+		},
+	);
+});
diff --git a/src/features/housekeeping/domains/hotel/services/mutations-runtime.ts b/src/features/housekeeping/domains/hotel/services/mutations-runtime.ts
index bb190b05..8dba17db 100644
--- a/src/features/housekeeping/domains/hotel/services/mutations-runtime.ts
+++ b/src/features/housekeeping/domains/hotel/services/mutations-runtime.ts
@@ -72,12 +72,12 @@ function requireFound(
 	return row;
 }
 
-function isSensitiveSetting(key: string): boolean {
-	return /secret|token|password|api[_-]?key|webhook|custom_js/i.test(key);
-}
-
-function settingSnapshot(key: string, value: string) {
-	return { key, value: isSensitiveSetting(key) ? "[Redacted]" : value };
+function settingSnapshot(key: string, _value: string, comment?: string | null) {
+	return {
+		key,
+		value: "[Redacted]",
+		...(comment ? { comment } : {}),
+	};
 }
 
 function safeImagePath(value: string): boolean {
@@ -127,8 +127,8 @@ const roomRuntimeSchema = z
 	})
 	.strict();
 
-const settingKey = requiredText(255).refine(
-	(key) => key.startsWith("radio_") || key.startsWith("auto_dj_"),
+const settingKey = requiredText(255).refine((key) =>
+	/^(?:radio_|auto_dj_)[a-z0-9_]+$/i.test(key),
 );
 const settingSchema = z
 	.object({
@@ -144,7 +144,7 @@ const settingsSchema = z
 				z.object({ key: settingKey, value: z.string().max(20_000) }).strict(),
 			)
 			.min(1)
-			.max(100),
+			.max(500),
 	})
 	.strict();
 const idSchema = z.object({ id: positiveBigInt }).strict();
@@ -368,8 +368,10 @@ async function executeRadioMutation(
 				set: { value: value.value, comment: value.comment || null },
 			});
 		return {
-			before: before ? settingSnapshot(before.key, before.value) : null,
-			after: settingSnapshot(value.key, value.value),
+			before: before
+				? settingSnapshot(before.key, before.value, before.comment)
+				: null,
+			after: settingSnapshot(value.key, value.value, value.comment),
 		};
 	}
 	if (operation === "radio.settings.save-many") {
@@ -627,7 +629,9 @@ async function executeRadioMutation(
 		before: {
 			settings: before.map((entry) => settingSnapshot(entry.key, entry.value)),
 		},
-		after: { settings: entries },
+		after: {
+			settings: entries.map((entry) => settingSnapshot(entry.key, entry.value)),
+		},
 	};
 }
 
diff --git a/src/features/housekeeping/foundation/contracts/result.ts b/src/features/housekeeping/foundation/contracts/result.ts
index 1ccbc87d..34b8e956 100644
--- a/src/features/housekeeping/foundation/contracts/result.ts
+++ b/src/features/housekeeping/foundation/contracts/result.ts
@@ -21,6 +21,7 @@ export interface HousekeepingPartialCompletion {
 	readonly status: "partial";
 	readonly external: "not-required" | "completed" | "failed";
 	readonly audit: "persisted" | "unavailable";
+	readonly cache?: "invalidated" | "unavailable";
 }
 
 export type HousekeepingResult<T> =
diff --git a/src/lib/services/site-settings.test.ts b/src/lib/services/site-settings.test.ts
index 3d80e7e8..95518e9a 100644
--- a/src/lib/services/site-settings.test.ts
+++ b/src/lib/services/site-settings.test.ts
@@ -1,6 +1,15 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const { selectFrom, redisMocks, loggerMocks } = vi.hoisted(() => ({
+	selectFrom: vi.fn(),
+	redisMocks: {
+		get: vi.fn(),
+		setex: vi.fn(),
+		del: vi.fn(),
+	},
+	loggerMocks: { warn: vi.fn() },
+}));
 
-const { selectFrom } = vi.hoisted(() => ({ selectFrom: vi.fn() }));
 vi.mock("@/lib/db", () => ({
 	db: {
 		select: () => ({
@@ -14,27 +23,37 @@ vi.mock("@/lib/db", () => ({
 	},
 	WebsiteSetting: { key: "WebsiteSetting.key", value: "WebsiteSetting.value" },
 }));
+vi.mock("@/lib/redis", () => ({ redis: redisMocks }));
+vi.mock("@/lib/logger", () => ({ logger: loggerMocks }));
 
-import { siteSettings } from "./site-settings";
+import { createSiteSettings } from "./site-settings";
 
-beforeEach(async () => {
+beforeEach(() => {
 	selectFrom.mockReset();
-	await siteSettings.reload();
+	redisMocks.get.mockReset().mockResolvedValue(null);
+	redisMocks.setex.mockReset().mockResolvedValue("OK");
+	redisMocks.del.mockReset().mockResolvedValue(1);
+	loggerMocks.warn.mockReset();
 });
 
+afterEach(() => vi.useRealTimers());
+
 describe("siteSettings", () => {
 	it("returns a value by key", async () => {
+		const siteSettings = createSiteSettings(null);
 		selectFrom.mockResolvedValue([{ key: "hotel_name", value: "AtomHotel" }]);
 		expect(await siteSettings.get("hotel_name")).toBe("AtomHotel");
 	});
 
 	it("returns the fallback when key is missing", async () => {
+		const siteSettings = createSiteSettings(null);
 		selectFrom.mockResolvedValue([]);
 		expect(await siteSettings.get("missing", "fallback")).toBe("fallback");
 		expect(await siteSettings.get("missing")).toBeNull();
 	});
 
 	it("coerces '1'/'0' string booleans", async () => {
+		const siteSettings = createSiteSettings(null);
 		selectFrom.mockResolvedValue([
 			{ key: "maintenance_enabled", value: "1" },
 			{ key: "radio_enabled", value: "0" },
@@ -45,6 +64,7 @@ describe("siteSettings", () => {
 	});
 
 	it("fetches once and caches until reload", async () => {
+		const siteSettings = createSiteSettings(null);
 		selectFrom.mockResolvedValue([{ key: "hotel_name", value: "AtomHotel" }]);
 		await siteSettings.get("hotel_name");
 		await siteSettings.getBool("hotel_name");
@@ -53,4 +73,124 @@ describe("siteSettings", () => {
 		await siteSettings.get("hotel_name");
 		expect(selectFrom).toHaveBeenCalledTimes(2);
 	});
+
+	it("refreshes expired memory from the database when Redis is not configured", async () => {
+		vi.useFakeTimers();
+		vi.setSystemTime(new Date("2026-09-05T08:00:00.000Z"));
+		const siteSettings = createSiteSettings(null);
+		selectFrom
+			.mockResolvedValueOnce([{ key: "hotel_name", value: "Before" }])
+			.mockResolvedValueOnce([{ key: "hotel_name", value: "After" }]);
+
+		expect(await siteSettings.get("hotel_name")).toBe("Before");
+		vi.advanceTimersByTime(60_001);
+		expect(await siteSettings.get("hotel_name")).toBe("After");
+		expect(selectFrom).toHaveBeenCalledTimes(2);
+	});
+
+	it("retains expired memory only when the database refresh fails", async () => {
+		vi.useFakeTimers();
+		vi.setSystemTime(new Date("2026-09-05T08:00:00.000Z"));
+		const siteSettings = createSiteSettings(null);
+		selectFrom
+			.mockResolvedValueOnce([{ key: "hotel_name", value: "Stale" }])
+			.mockRejectedValueOnce(new Error("database unavailable"));
+
+		expect(await siteSettings.get("hotel_name")).toBe("Stale");
+		vi.advanceTimersByTime(60_001);
+		expect(await siteSettings.get("hotel_name")).toBe("Stale");
+		expect(selectFrom).toHaveBeenCalledTimes(2);
+		expect(loggerMocks.warn).toHaveBeenCalledWith(
+			"Failed to load site settings from database, using fallback",
+		);
+	});
+
+	it("blocks reads during reload and discards stale Redis data from an older flight", async () => {
+		let resolveRedisRead!: (value: string) => void;
+		let resolveDelete!: (value: number) => void;
+		redisMocks.get.mockReturnValueOnce(
+			new Promise<string>((resolve) => {
+				resolveRedisRead = resolve;
+			}),
+		);
+		redisMocks.del.mockReturnValueOnce(
+			new Promise<number>((resolve) => {
+				resolveDelete = resolve;
+			}),
+		);
+		selectFrom.mockResolvedValue([{ key: "hotel_name", value: "Fresh" }]);
+		const siteSettings = createSiteSettings(redisMocks);
+
+		const oldRead = siteSettings.get("hotel_name");
+		await vi.waitFor(() => expect(redisMocks.get).toHaveBeenCalledTimes(1));
+		const reload = siteSettings.reload();
+		const newRead = siteSettings.get("hotel_name");
+		await Promise.resolve();
+		expect(redisMocks.get).toHaveBeenCalledTimes(1);
+
+		resolveRedisRead(JSON.stringify({ hotel_name: "Stale Redis" }));
+		resolveDelete(1);
+
+		expect(await reload).toEqual({
+			invalidated: true,
+			redis: "invalidated",
+		});
+		expect(await oldRead).toBe("Fresh");
+		expect(await newRead).toBe("Fresh");
+		expect(selectFrom).toHaveBeenCalledTimes(1);
+	});
+
+	it("does not let an old flight clear the newer single flight", async () => {
+		let resolveOldDb!: (rows: Array<{ key: string; value: string }>) => void;
+		let resolveNewDb!: (rows: Array<{ key: string; value: string }>) => void;
+		selectFrom
+			.mockReturnValueOnce(
+				new Promise((resolve) => {
+					resolveOldDb = resolve;
+				}),
+			)
+			.mockReturnValueOnce(
+				new Promise((resolve) => {
+					resolveNewDb = resolve;
+				}),
+			);
+		const siteSettings = createSiteSettings(null);
+
+		const oldRead = siteSettings.get("hotel_name");
+		await vi.waitFor(() => expect(selectFrom).toHaveBeenCalledTimes(1));
+		await siteSettings.reload();
+		const newRead = siteSettings.get("hotel_name");
+		await vi.waitFor(() => expect(selectFrom).toHaveBeenCalledTimes(2));
+		resolveOldDb([{ key: "hotel_name", value: "Old" }]);
+		await Promise.resolve();
+		const joinedRead = siteSettings.get("hotel_name");
+		expect(selectFrom).toHaveBeenCalledTimes(2);
+		resolveNewDb([{ key: "hotel_name", value: "New" }]);
+
+		expect(await Promise.all([oldRead, newRead, joinedRead])).toEqual([
+			"New",
+			"New",
+			"New",
+		]);
+	});
+
+	it("reports Redis invalidation failure without rejection and bypasses stale Redis", async () => {
+		redisMocks.get.mockResolvedValueOnce(
+			JSON.stringify({ hotel_name: "Stale Redis" }),
+		);
+		redisMocks.del.mockRejectedValueOnce(new Error("Redis unavailable"));
+		selectFrom.mockResolvedValue([{ key: "hotel_name", value: "Fresh DB" }]);
+		const siteSettings = createSiteSettings(redisMocks);
+
+		expect(await siteSettings.get("hotel_name")).toBe("Stale Redis");
+		await expect(siteSettings.reload()).resolves.toEqual({
+			invalidated: false,
+			redis: "unavailable",
+		});
+		expect(await siteSettings.get("hotel_name")).toBe("Fresh DB");
+		expect(redisMocks.get).toHaveBeenCalledTimes(1);
+		expect(loggerMocks.warn).toHaveBeenCalledWith(
+			"Failed to invalidate Redis cache for site settings",
+		);
+	});
 });
diff --git a/src/lib/services/site-settings.ts b/src/lib/services/site-settings.ts
index a008e288..6e2b0e61 100644
--- a/src/lib/services/site-settings.ts
+++ b/src/lib/services/site-settings.ts
@@ -13,41 +13,70 @@ const DEFAULTS: Record<string, string> = {
 
 const CACHE_TTL_MS = 300_000;
 const REDIS_CACHE_KEY = "site_settings";
-// Short in-process window so repeated getters in one request (header, nav,
-// footer all read logo and other settings) don't each pay a Redis round-trip.
-// Redis stays the source of truth across instances.
 const MEMORY_TTL_MS = 60_000;
 
-// During `next build`, pages are prerendered and `Date.now()` is treated as an
-// unstable prerender value — always serve the in-process cache then (settings
-// cannot change mid-build). Runtime keeps the normal TTL check.
 const IS_PRERENDER =
 	process.env.NEXT_PHASE === "phase-production-build" ||
 	process.env.NEXT_PHASE === "phase-production-compile";
 
+type RedisClient = Pick<NonNullable<typeof redis>, "get" | "setex" | "del">;
+
+export interface SiteSettingsInvalidationResult {
+	readonly invalidated: boolean;
+	readonly redis: "invalidated" | "not-configured" | "unavailable";
+}
+
 class SiteSettings {
 	private cache: { map: Map<string, string>; expiresAt: number } | null = null;
-	// Single-flight: one request (re)loads the map, the rest await it — the
-	// root layout reads settings on every render, so concurrent misses must
-	// not each hammer Redis/DB (cache-stampede protection).
-	private inFlight: Promise<Map<string, string>> | null = null;
+	private inFlight: {
+		generation: number;
+		promise: Promise<Map<string, string>>;
+	} | null = null;
+	private invalidationFlight: Promise<SiteSettingsInvalidationResult> | null =
+		null;
+	private readonly pendingRedisWrites = new Set<Promise<void>>();
+	private generation = 0;
+	private bypassRedis = false;
+
+	constructor(private readonly redisClient: RedisClient | null) {}
 
 	private async loadFromDb(): Promise<Map<string, string>> {
+		const rows = await db
+			.select({ key: WebsiteSetting.key, value: WebsiteSetting.value })
+			.from(WebsiteSetting);
+		return new Map(rows.map((row) => [row.key, row.value]));
+	}
+
+	private async writeRedis(
+		map: Map<string, string>,
+		generation: number,
+	): Promise<void> {
+		if (!this.redisClient || generation !== this.generation) return;
+		const write = Promise.resolve(
+			this.redisClient.setex(
+				REDIS_CACHE_KEY,
+				Math.ceil(CACHE_TTL_MS / 1000),
+				JSON.stringify(Object.fromEntries(map.entries())),
+			),
+		).then(() => undefined);
+		this.pendingRedisWrites.add(write);
 		try {
-			const rows = await db
-				.select({ key: WebsiteSetting.key, value: WebsiteSetting.value })
-				.from(WebsiteSetting);
-			return new Map(rows.map((r) => [r.key, r.value]));
+			await write;
 		} catch {
-			logger.warn("Failed to load site settings from database, using defaults");
-			return new Map(Object.entries(DEFAULTS));
+			logger.warn("Failed to write site settings to Redis cache");
+		} finally {
+			this.pendingRedisWrites.delete(write);
 		}
 	}
 
-	private async loadFromCacheOrDb(): Promise<Map<string, string>> {
-		if (redis) {
+	private async loadForGeneration(
+		generation: number,
+		stale: Map<string, string> | null,
+	): Promise<Map<string, string>> {
+		if (this.redisClient && !this.bypassRedis) {
 			try {
-				const cached = await redis.get(REDIS_CACHE_KEY);
+				const cached = await this.redisClient.get(REDIS_CACHE_KEY);
+				if (generation !== this.generation) return this.load();
 				if (cached) {
 					const parsed = JSON.parse(cached) as Record<string, string>;
 					const map = new Map(Object.entries(parsed));
@@ -59,42 +88,42 @@ class SiteSettings {
 			}
 		}
 
-		// Expired but usable fallback — keeps the site up if both Redis and DB fail.
-		if (this.cache !== null) return this.cache.map;
-
-		const map = await this.loadFromDb();
-		this.cache = { map, expiresAt: Date.now() + MEMORY_TTL_MS };
-
-		if (redis) {
-			try {
-				const obj = Object.fromEntries(map.entries());
-				await redis.setex(
-					REDIS_CACHE_KEY,
-					Math.ceil(CACHE_TTL_MS / 1000),
-					JSON.stringify(obj),
-				);
-			} catch {
-				logger.warn("Failed to write site settings to Redis cache");
-			}
+		let map: Map<string, string>;
+		try {
+			map = await this.loadFromDb();
+		} catch {
+			logger.warn("Failed to load site settings from database, using fallback");
+			if (generation !== this.generation) return this.load();
+			if (stale) return stale;
+			map = new Map(Object.entries(DEFAULTS));
 		}
 
+		if (generation !== this.generation) return this.load();
+		this.cache = { map, expiresAt: Date.now() + MEMORY_TTL_MS };
+		await this.writeRedis(map, generation);
+		if (generation !== this.generation) return this.load();
 		return map;
 	}
 
 	private async load(): Promise<Map<string, string>> {
-		if (this.cache !== null) {
-			if (IS_PRERENDER || this.cache.expiresAt > Date.now()) {
-				return this.cache.map;
-			}
+		while (this.invalidationFlight) await this.invalidationFlight;
+
+		if (
+			this.cache !== null &&
+			(IS_PRERENDER || this.cache.expiresAt > Date.now())
+		) {
+			return this.cache.map;
 		}
 
-		if (this.inFlight) return this.inFlight;
-
-		const run = this.loadFromCacheOrDb().finally(() => {
-			this.inFlight = null;
+		const generation = this.generation;
+		if (this.inFlight?.generation === generation) return this.inFlight.promise;
+		const stale = this.cache?.map ?? null;
+		let promise!: Promise<Map<string, string>>;
+		promise = this.loadForGeneration(generation, stale).finally(() => {
+			if (this.inFlight?.promise === promise) this.inFlight = null;
 		});
-		this.inFlight = run;
-		return run;
+		this.inFlight = { generation, promise };
+		return promise;
 	}
 
 	async getAll(): Promise<Map<string, string>> {
@@ -123,10 +152,10 @@ class SiteSettings {
 	}
 
 	async getBool(key: string, fallback = false): Promise<boolean> {
-		const v = await this.get(key, null);
-		if (v === null) return fallback;
-		const s = v.toLowerCase();
-		return s === "1" || s === "true";
+		const value = await this.get(key, null);
+		if (value === null) return fallback;
+		const normalized = value.toLowerCase();
+		return normalized === "1" || normalized === "true";
 	}
 
 	async update(key: string, value: string): Promise<void> {
@@ -137,17 +166,39 @@ class SiteSettings {
 		await this.reload();
 	}
 
-	async reload(): Promise<void> {
+	reload(): Promise<SiteSettingsInvalidationResult> {
+		const generation = ++this.generation;
 		this.cache = null;
 		this.inFlight = null;
-		if (redis) {
+		this.bypassRedis = true;
+		const pendingWrites = [...this.pendingRedisWrites];
+		let promise!: Promise<SiteSettingsInvalidationResult>;
+		promise = (async (): Promise<SiteSettingsInvalidationResult> => {
+			if (!this.redisClient) {
+				if (generation === this.generation) this.bypassRedis = false;
+				return { invalidated: true, redis: "not-configured" };
+			}
+			await Promise.allSettled(pendingWrites);
 			try {
-				await redis.del(REDIS_CACHE_KEY);
+				await this.redisClient.del(REDIS_CACHE_KEY);
+				if (generation === this.generation) this.bypassRedis = false;
+				return { invalidated: true, redis: "invalidated" };
 			} catch {
 				logger.warn("Failed to invalidate Redis cache for site settings");
+				return { invalidated: false, redis: "unavailable" };
 			}
-		}
+		})().finally(() => {
+			if (this.invalidationFlight === promise) this.invalidationFlight = null;
+		});
+		this.invalidationFlight = promise;
+		return promise;
 	}
 }
 
-export const siteSettings = new SiteSettings();
+export function createSiteSettings(
+	redisClient: RedisClient | null = redis,
+): SiteSettings {
+	return new SiteSettings(redisClient);
+}
+
+export const siteSettings = createSiteSettings();