diff --git a/frontend/src/lib/forms.ts b/frontend/src/lib/forms.ts
deleted file mode 100644
index 365bd8f..0000000
--- a/frontend/src/lib/forms.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-export function debouncedInput(fn: (input: string) => void, delay: number = 500) {
-	let timeout: number;
-
-	return (input: string) => {
-		window.clearTimeout(timeout);
-		timeout = window.setTimeout(() => {
-			fn(input);
-		}, delay);
-	};
-}
diff --git a/frontend/src/lib/index.ts b/frontend/src/lib/index.ts
deleted file mode 100644
index 856f2b6..0000000
--- a/frontend/src/lib/index.ts
+++ /dev/null
@@ -1 +0,0 @@
-// place files you want to import through the `$lib` alias in this folder.
diff --git a/frontend/src/lib/watchtower/notifications.svelte.test.ts b/frontend/src/lib/watchtower/notifications.svelte.test.ts
new file mode 100644
index 0000000..3b143f4
--- /dev/null
+++ b/frontend/src/lib/watchtower/notifications.svelte.test.ts
@@ -0,0 +1,94 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import * as wails from "$lib/wailsjs/go/watchtower/Service";
+import { notifications } from "$lib/wailsjs/go/models";
+import { NotificationsService } from "$lib/watchtower/notifications.svelte";
+
+describe("NotificationsService", () => {
+	const spyGetUnread = vi.spyOn(wails, "GetUnreadNotifications");
+	const spyMarkAsRead = vi.spyOn(wails, "MarkNotificationAsRead");
+
+	beforeEach(() => {
+		vi.clearAllMocks();
+		vi.useFakeTimers();
+	});
+
+	describe("getUnread()", () => {
+		beforeEach(() => {
+			spyGetUnread.mockResolvedValue([
+				new notifications.Notification({ id: 1, content: "Test notification" })
+			]);
+		});
+
+		it("should return unread notifications", async () => {
+			const notificationSvc = new NotificationsService();
+			const list = await notificationSvc.getUnread();
+			expect(list).toHaveLength(1);
+			expect(spyGetUnread).toHaveBeenCalledTimes(1);
+		});
+
+		it("should have id and content", async () => {
+			const notificationSvc = new NotificationsService();
+			const list = await notificationSvc.getUnread();
+			list.forEach((n) => {
+				expect(n).toHaveProperty("id");
+				expect(n).toHaveProperty("content");
+			});
+		});
+
+		it("should not refetch if not stale", async () => {
+			const notificationSvc = new NotificationsService();
+			await notificationSvc.getUnread();
+			expect(spyGetUnread).toHaveBeenCalledTimes(1);
+
+			await notificationSvc.getUnread();
+			expect(spyGetUnread).toHaveBeenCalledTimes(1);
+		});
+
+		it("should refetch if stale", async () => {
+			const notificationSvc = new NotificationsService();
+			await notificationSvc.getUnread();
+			expect(spyGetUnread).toHaveBeenCalledTimes(1);
+
+			vi.setSystemTime(new Date(Date.now() + 3 * 60 * 1000));
+
+			await notificationSvc.getUnread();
+			expect(spyGetUnread).toHaveBeenCalledTimes(2);
+		});
+	});
+
+	describe("markAsRead()", () => {
+		it("should call MarkNotificationAsRead and refresh list", async () => {
+			spyMarkAsRead.mockResolvedValue();
+			spyGetUnread.mockResolvedValue([]);
+
+			const notificationSvc = new NotificationsService();
+			await notificationSvc.markAsRead(1);
+
+			expect(spyMarkAsRead).toHaveBeenCalledWith(1);
+		});
+	});
+
+	describe("markAllAsRead()", () => {
+		it("should mark each notification as read and refresh", async () => {
+			const mockNotifications = [
+				new notifications.Notification({ id: 1, content: "N1" }),
+				new notifications.Notification({ id: 2, content: "N2" })
+			];
+
+			spyGetUnread.mockResolvedValueOnce(mockNotifications);
+			spyMarkAsRead.mockResolvedValue();
+
+			const notificationSvc = new NotificationsService();
+
+			await notificationSvc.getUnread();
+
+			spyGetUnread.mockResolvedValue([]);
+			await notificationSvc.markAllAsRead();
+
+			expect(spyMarkAsRead).toHaveBeenCalledTimes(2);
+			expect(spyMarkAsRead).toHaveBeenCalledWith(1);
+			expect(spyMarkAsRead).toHaveBeenCalledWith(2);
+			expect(spyGetUnread).toHaveBeenCalledTimes(2);
+		});
+	});
+});
diff --git a/frontend/src/lib/watchtower/notifications.svelte.ts b/frontend/src/lib/watchtower/notifications.svelte.ts
index 0305153..0eb201e 100644
--- a/frontend/src/lib/watchtower/notifications.svelte.ts
+++ b/frontend/src/lib/watchtower/notifications.svelte.ts
@@ -1,27 +1,83 @@
+import { notifications } from "$lib/wailsjs/go/models";
+import { STALE_TIMEOUT_MINUTES } from "$lib/watchtower/types";
 import { GetUnreadNotifications, MarkNotificationAsRead } from "$lib/wailsjs/go/watchtower/Service";
 
 export class NotificationsService {
+	readonly #notifications: notifications.Notification[];
+	#lastSync?: number;
+
+	constructor() {
+		this.#notifications = $state([]);
+	}
 	/**
 	 * Retrieves the unread notifications for the user.
 	 */
 	async getUnread() {
-		return (await GetUnreadNotifications()) ?? [];
+		if (this.isStale()) {
+			await this.forceGetNotifications();
+		}
+
+		return this.#notifications;
 	}
 
 	/**
 	 * Marks a notification as read based on the provided notification ID.
 	 */
 	async markAsRead(id: number) {
-		return await MarkNotificationAsRead(id);
+		await MarkNotificationAsRead(id);
+		const idx = this.#notifications.findIndex((n) => n.id === id);
+		if (idx < 0) {
+			return;
+		}
+
+		this.#notifications.splice(
+			idx,
+			1,
+			new notifications.Notification({
+				...this.#notifications[idx],
+				status: "read"
+			})
+		);
 	}
 
 	/**
 	 * Marks all unread notifications as read.
 	 */
 	async markAllAsRead() {
-		const notifications = await this.getUnread();
+		const notifications = [...(await this.getUnread())];
 		for (const notification of notifications) {
 			await this.markAsRead(notification.id);
 		}
+
+		await this.forceGetNotifications();
+	}
+
+	/**
+	 * Forces the retrieval of unread notifications and updates the internal state with the fetched notifications.
+	 */
+	private async forceGetNotifications() {
+		const notifications = (await GetUnreadNotifications()) ?? [];
+		this.updateInternalNotifications(notifications);
+	}
+
+	/**
+	 * Updates the internal notifications by replacing the current list with the provided notifications array.
+	 */
+	private updateInternalNotifications(notifications: notifications.Notification[]) {
+		this.#notifications.splice(0, this.#notifications.length, ...notifications);
+		this.#lastSync = Date.now();
+	}
+
+	/**
+	 * Determines whether the current state is considered stale based on the last synchronisation time
+	 * and the presence of notifications.
+	 */
+	private isStale() {
+		if (!this.#lastSync || this.#notifications.length === 0) {
+			return true;
+		}
+
+		const diff = (Date.now() - this.#lastSync) / (1000 * 60);
+		return diff > STALE_TIMEOUT_MINUTES;
 	}
 }