feat(theme): animate public background with aurora and particles, polish landing pages

Add background_effect (aurora/particles), background_overlay tint and
opacity to the theme manager, rendered site-wide by ThemeVars on every
public page. Polish the home and register pages (hero mascot, live stat
pulse, date pills, photo strip, CTA band, theme-aware register intro,
i18n for home/register section).

src/actions/theme-manager.ts

@@ -12,10 +12,12 @@ import { siteSettings } from "@/lib/services/site-settings";
 import { logStaffActivity } from "@/lib/services/staff-activity";
 import {
 	BACKGROUND_DEFAULTS,
+	BACKGROUND_EFFECTS,
 	BACKGROUND_POSITIONS,
 	BACKGROUND_REPEATS,
 	BACKGROUND_SIZES,
 	isSafeBackgroundUrl,
+	OVERLAY_OPACITY_MAX,
 } from "@/lib/theme-bg";
 import {
 	type CustomTheme,
@@ -187,6 +189,17 @@ export async function saveBackground(formData: FormData): Promise<void> {
 	const repeat = String(formData.get("background_repeat") ?? "")
 		.normalize("NFC")
 		.trim();
+	const effect = String(formData.get("background_effect") ?? "")
+		.normalize("NFC")
+		.trim();
+	const overlay = String(formData.get("background_overlay") ?? "")
+		.normalize("NFC")
+		.trim();
+	const overlayOpacity = String(
+		formData.get("background_overlay_opacity") ?? "",
+	)
+		.normalize("NFC")
+		.trim();
 
 	if (image && !isSafeBackgroundUrl(image)) redirect(MANAGER_PATH);
 
@@ -210,6 +223,22 @@ export async function saveBackground(formData: FormData): Promise<void> {
 				? repeat
 				: BACKGROUND_DEFAULTS.background_repeat,
 		);
+		await writeSetting(
+			"background_effect",
+			(BACKGROUND_EFFECTS as readonly string[]).includes(effect)
+				? effect
+				: BACKGROUND_DEFAULTS.background_effect,
+		);
+		await writeSetting(
+			"background_overlay",
+			/^#[0-9a-fA-F]{3,8}$/.test(overlay) ? overlay : "",
+		);
+		await writeSetting(
+			"background_overlay_opacity",
+			/^\d{1,2}$/.test(overlayOpacity)
+				? String(Math.min(parseInt(overlayOpacity, 10), OVERLAY_OPACITY_MAX))
+				: "0",
+		);
 		siteSettings.reload();
 		revalidatePath("/", "layout");
 		revalidatePath(MANAGER_PATH);
@@ -344,6 +373,29 @@ export async function getThemeManagerData() {
 			)
 				? (backgroundValues.background_repeat as string)
 				: BACKGROUND_DEFAULTS.background_repeat,
+			effect: (BACKGROUND_EFFECTS as readonly string[]).includes(
+				backgroundValues.background_effect ?? "",
+			)
+				? (backgroundValues.background_effect as string)
+				: BACKGROUND_DEFAULTS.background_effect,
+			overlay: /^#[0-9a-fA-F]{3,8}$/.test(
+				backgroundValues.background_overlay ?? "",
+			)
+				? (backgroundValues.background_overlay as string)
+				: "",
+			overlayOpacity: /^\d{1,2}$/.test(
+				backgroundValues.background_overlay_opacity ?? "",
+			)
+				? String(
+						Math.min(
+							parseInt(
+								backgroundValues.background_overlay_opacity as string,
+								10,
+							),
+							OVERLAY_OPACITY_MAX,
+						),
+					)
+				: "0",
 		},
 	};
 }

src/app/(site)/register/page.tsx

@@ -65,16 +65,16 @@ export default async function RegisterPage() {
 							<div
 								className="absolute inset-0"
 								style={{
-									background: `url(/assets/images/background.png) center/cover no-repeat`,
+									background:
+										"linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 10%, transparent), color-mix(in srgb, var(--color-accent) 10%, transparent))",
 								}}
 							/>
 							<div
-								className="absolute inset-0"
-								style={{
-									background:
-										"linear-gradient(135deg, color-mix(in srgb, var(--color-surface) 88%, transparent) 0%, color-mix(in srgb, var(--color-surface) 35%, transparent) 100%)",
-								}}
-							/>
+								aria-hidden="true"
+								className="absolute inset-0 overflow-hidden"
+							>
+								<div className="brand-halo left-1/2 top-0 h-64 w-[460px] max-w-full -translate-x-1/2 -translate-y-1/2" />
+							</div>
 							<div className="relative">
 								<div className="flex items-center gap-4">
 									<div className="shrink-0 animate-float">
@@ -135,7 +135,8 @@ export default async function RegisterPage() {
 									{recentUsers.map((u) => (
 										<div
 											key={u.username}
-											className="flex flex-col items-center gap-1.5 rounded-xl border px-1 py-2 transition-all duration-200 hover:-translate-y-0.5"
+											title={u.username}
+											className="flex flex-col items-center gap-1.5 rounded-xl border px-1 py-2 transition-all duration-200 hover:-translate-y-0.5 hover:ring-1 hover:ring-[color-mix(in_srgb,var(--color-primary)_35%,transparent)]"
 											style={{
 												background:
 													"color-mix(in srgb, var(--color-primary) 4%, transparent)",
@@ -163,7 +164,7 @@ export default async function RegisterPage() {
 
 						{latestUsers.length > 0 && (
 							<SurfaceCard
-								title="Newest citizens"
+								title={tpr("newestCitizens")}
 								icon={ICON_FRIENDS}
 								bodyClassName="p-4"
 								className="card-glow"
@@ -172,7 +173,8 @@ export default async function RegisterPage() {
 									{latestUsers.map((u) => (
 										<div
 											key={u.username}
-											className="flex flex-col items-center gap-1.5 rounded-xl border px-1 py-2 transition-all duration-200 hover:-translate-y-0.5"
+											title={u.username}
+											className="flex flex-col items-center gap-1.5 rounded-xl border px-1 py-2 transition-all duration-200 hover:-translate-y-0.5 hover:ring-1 hover:ring-[color-mix(in_srgb,var(--color-primary)_35%,transparent)]"
 											style={{
 												background:
 													"color-mix(in srgb, var(--color-primary) 4%, transparent)",

src/lib/theme-bg.ts

@@ -7,9 +7,37 @@ export const BACKGROUND_KEYS = [
 	"background_position",
 	"background_size",
 	"background_repeat",
+	"background_effect",
+	"background_overlay",
+	"background_overlay_opacity",
 ] as const;
 export type BackgroundKey = (typeof BACKGROUND_KEYS)[number];
 
+/**
+ * Animated background effects rendered behind the public site. Purely
+ * decorative and CSS-driven (transform/opacity only) so they stay cheap on
+ * every device and respect `prefers-reduced-motion`.
+ */
+export const BACKGROUND_EFFECTS = [
+	"none",
+	"aurora",
+	"particles",
+	"aurora-particles",
+] as const;
+export type BackgroundEffect = (typeof BACKGROUND_EFFECTS)[number];
+
+export const BACKGROUND_EFFECT_DEFAULT: BackgroundEffect = "none";
+
+export const OVERLAY_PRESETS = [
+	{ label: "None", value: "" },
+	{ label: "Black", value: "#000000" },
+	{ label: "White", value: "#ffffff" },
+	{ label: "Navy", value: "#0b1220" },
+	{ label: "Slate", value: "#1e293b" },
+] as const;
+
+export const OVERLAY_OPACITY_MAX = 90;
+
 export const BACKGROUND_POSITIONS = [
 	"center center",
 	"top center",
@@ -36,6 +64,9 @@ export const BACKGROUND_DEFAULTS: Record<BackgroundKey, string> = {
 	background_position: "center center",
 	background_size: "cover",
 	background_repeat: "no-repeat",
+	background_effect: BACKGROUND_EFFECT_DEFAULT,
+	background_overlay: "",
+	background_overlay_opacity: "0",
 };
 
 /**

src/messages/en.json

@@ -288,7 +288,11 @@
 			"sectionStatsLabel": "Live stats",
 			"sectionStatsTitle": "A community that keeps growing",
 			"sectionCommunityLabel": "Community",
-			"sectionCommunityTitle": "Make yourself at home"
+			"sectionCommunityTitle": "Make yourself at home",
+			"joinCtaTitle": "Ready to make yourself at home?",
+			"joinCtaBody": "Create your avatar, grab some furni and meet new friends — your hotel adventure starts here.",
+			"ctaJoin": "Join the hotel",
+			"browseCommunity": "Browse the community"
 		},
 		"news": {
 			"title": "News",
@@ -997,6 +1001,7 @@
 			"alreadyHaveAccountLink": "Sign in",
 			"register": "Register",
 			"whoIsOnline": "Who's online",
+			"newestCitizens": "Newest citizens",
 			"usersOnline": "{count} online",
 			"termsError": "You must accept the terms & rules to register.",
 			"usernameError": "Username is required.",
@@ -4810,6 +4815,15 @@
 							"applyBackground": "Apply background",
 							"uploadButton": "Upload image…",
 							"clearBackground": "Remove background",
+							"backgroundEffectLabel": "Effect",
+							"backgroundEffectHint": "Animate the public background with a gentle, theme-matched layer (aurora uses your primary/accent colors).",
+							"backgroundEffect_none": "None (plain background)",
+							"backgroundEffect_aurora": "Aurora glow",
+							"backgroundEffect_particles": "Floating particles",
+							"backgroundEffect_aurora-particles": "Aurora + particles",
+							"backgroundEffectPreview": "Effect: {effect} — shown behind the public site.",
+							"backgroundOverlayLabel": "Overlay tint",
+							"backgroundOverlayOpacityLabel": "Overlay strength",
 							"notice": {
 								"saved": "Theme saved.",
 								"applied": "Theme applied.",

src/messages/it.json

@@ -283,12 +283,16 @@
 			"featuresCommunityDesc": "Fai amicizia e chatta",
 			"featuresGames": "Giochi",
 			"featuresGamesDesc": "Competi e divertiti",
-			"sectionFeaturesLabel": "Features",
-			"sectionFeaturesTitle": "Everything a great hotel needs",
-			"sectionStatsLabel": "Live stats",
-			"sectionStatsTitle": "A community that keeps growing",
+			"sectionFeaturesLabel": "Funzionalità",
+			"sectionFeaturesTitle": "Tutto ciò che un grande hotel merita",
+			"sectionStatsLabel": "Statistiche live",
+			"sectionStatsTitle": "Una community che continua a crescere",
 			"sectionCommunityLabel": "Community",
-			"sectionCommunityTitle": "Make yourself at home"
+			"sectionCommunityTitle": "Fatti sentire a casa",
+			"joinCtaTitle": "Pronto a sentirti a casa?",
+			"joinCtaBody": "Crea il tuo avatar, prendi dei mobili e incontra nuovi amici: la tua avventura nell'hotel inizia qui.",
+			"ctaJoin": "Entra nell'hotel",
+			"browseCommunity": "Scopri la community"
 		},
 		"news": {
 			"title": "Notizie",
@@ -976,6 +980,7 @@
 			"alreadyHaveAccountPre": "Hai già un account?",
 			"alreadyHaveAccountLink": "Accedi",
 			"whoIsOnline": "Chi è online",
+			"newestCitizens": "Nuovi cittadini",
 			"usersOnline": "{count} online",
 			"accepted": "Accettato e confermato",
 			"showPassword": "Mostra",
@@ -4809,6 +4814,15 @@
 							"applyBackground": "Applica sfondo",
 							"uploadButton": "Carica immagine…",
 							"clearBackground": "Rimuovi sfondo",
+							"backgroundEffectLabel": "Effetto",
+							"backgroundEffectHint": "Anima lo sfondo pubblico con un livello delicato e abbinato al tema (l'aurora usa i colori primario/accento).",
+							"backgroundEffect_none": "Nessuno (sfondo semplice)",
+							"backgroundEffect_aurora": "Bagliore aurora",
+							"backgroundEffect_particles": "Particelle fluttuanti",
+							"backgroundEffect_aurora-particles": "Aurora + particelle",
+							"backgroundEffectPreview": "Effetto: {effect} — mostrato dietro il sito pubblico.",
+							"backgroundOverlayLabel": "Tinta di sovrapposizione",
+							"backgroundOverlayOpacityLabel": "Intensità tinta",
 							"notice": {
 								"saved": "Tema salvato.",
 								"applied": "Tema applicato.",