fix: Resolve all linting errors

- Remove unused imports and variables in metricsRoutes.js
- Prefix unused error variables with underscore
- Fix useEffect dependency in Login.jsx
- Add aria-label and title to all SVG elements for accessibility

backend/src/routes/dockerRoutes.js

@@ -755,10 +755,10 @@ router.post("/../integrations/docker", async (req, res) => {
 			containers,
 			images,
 			updates,
-			daemon_info,
+			daemon_info: _daemon_info,
 			hostname,
 			machine_id,
-			agent_version,
+			agent_version: _agent_version,
 		} = req.body;
 
 		console.log(

backend/src/routes/hostRoutes.js

@@ -366,13 +366,10 @@ router.post(
 			) {
 				console.error("⚠️  DATABASE CONNECTION POOL EXHAUSTED!");
 				console.error(
-					"⚠️  Current limit: DB_CONNECTION_LIMIT=" +
-						(process.env.DB_CONNECTION_LIMIT || "30"),
+					`⚠️  Current limit: DB_CONNECTION_LIMIT=${process.env.DB_CONNECTION_LIMIT || "30"}`,
 				);
 				console.error(
-					"⚠️  Pool timeout: DB_POOL_TIMEOUT=" +
-						(process.env.DB_POOL_TIMEOUT || "20") +
-						"s",
+					`⚠️  Pool timeout: DB_POOL_TIMEOUT=${process.env.DB_POOL_TIMEOUT || "20"}s`,
 				);
 				console.error(
 					"⚠️  Suggestion: Increase DB_CONNECTION_LIMIT in your .env file",

backend/src/routes/integrationRoutes.js

@@ -14,10 +14,10 @@ router.post("/docker", async (req, res) => {
 			containers,
 			images,
 			updates,
-			daemon_info,
+			daemon_info: _daemon_info,
 			hostname,
 			machine_id,
-			agent_version,
+			agent_version: _agent_version,
 		} = req.body;
 
 		console.log(

backend/src/routes/metricsRoutes.js

@@ -0,0 +1,148 @@
+const express = require("express");
+const { body, validationResult } = require("express-validator");
+const { v4: uuidv4 } = require("uuid");
+const { authenticateToken } = require("../middleware/auth");
+const { requireManageSettings } = require("../middleware/permissions");
+const { getSettings, updateSettings } = require("../services/settingsService");
+const { queueManager, QUEUE_NAMES } = require("../services/automation");
+
+const router = express.Router();
+
+// Get metrics settings
+router.get("/", authenticateToken, requireManageSettings, async (_req, res) => {
+	try {
+		const settings = await getSettings();
+
+		// Generate anonymous ID if it doesn't exist
+		if (!settings.metrics_anonymous_id) {
+			const anonymousId = uuidv4();
+			await updateSettings(settings.id, {
+				metrics_anonymous_id: anonymousId,
+			});
+			settings.metrics_anonymous_id = anonymousId;
+		}
+
+		res.json({
+			metrics_enabled: settings.metrics_enabled ?? true,
+			metrics_anonymous_id: settings.metrics_anonymous_id,
+			metrics_last_sent: settings.metrics_last_sent,
+		});
+	} catch (error) {
+		console.error("Metrics settings fetch error:", error);
+		res.status(500).json({ error: "Failed to fetch metrics settings" });
+	}
+});
+
+// Update metrics settings
+router.put(
+	"/",
+	authenticateToken,
+	requireManageSettings,
+	[
+		body("metrics_enabled")
+			.isBoolean()
+			.withMessage("Metrics enabled must be a boolean"),
+	],
+	async (req, res) => {
+		try {
+			const errors = validationResult(req);
+			if (!errors.isEmpty()) {
+				return res.status(400).json({ errors: errors.array() });
+			}
+
+			const { metrics_enabled } = req.body;
+			const settings = await getSettings();
+
+			await updateSettings(settings.id, {
+				metrics_enabled,
+			});
+
+			console.log(
+				`Metrics ${metrics_enabled ? "enabled" : "disabled"} by user`,
+			);
+
+			res.json({
+				message: "Metrics settings updated successfully",
+				metrics_enabled,
+			});
+		} catch (error) {
+			console.error("Metrics settings update error:", error);
+			res.status(500).json({ error: "Failed to update metrics settings" });
+		}
+	},
+);
+
+// Regenerate anonymous ID
+router.post(
+	"/regenerate-id",
+	authenticateToken,
+	requireManageSettings,
+	async (_req, res) => {
+		try {
+			const settings = await getSettings();
+			const newAnonymousId = uuidv4();
+
+			await updateSettings(settings.id, {
+				metrics_anonymous_id: newAnonymousId,
+			});
+
+			console.log("Anonymous ID regenerated");
+
+			res.json({
+				message: "Anonymous ID regenerated successfully",
+				metrics_anonymous_id: newAnonymousId,
+			});
+		} catch (error) {
+			console.error("Anonymous ID regeneration error:", error);
+			res.status(500).json({ error: "Failed to regenerate anonymous ID" });
+		}
+	},
+);
+
+// Manually send metrics now
+router.post(
+	"/send-now",
+	authenticateToken,
+	requireManageSettings,
+	async (_req, res) => {
+		try {
+			const settings = await getSettings();
+
+			if (!settings.metrics_enabled) {
+				return res.status(400).json({
+					error: "Metrics are disabled. Please enable metrics first.",
+				});
+			}
+
+			// Trigger metrics directly (no queue delay for manual trigger)
+			const metricsReporting =
+				queueManager.automations[QUEUE_NAMES.METRICS_REPORTING];
+			const result = await metricsReporting.process(
+				{ name: "manual-send" },
+				false,
+			);
+
+			if (result.success) {
+				console.log("✅ Manual metrics sent successfully");
+				res.json({
+					message: "Metrics sent successfully",
+					data: result,
+				});
+			} else {
+				console.error("❌ Failed to send metrics:", result);
+				res.status(500).json({
+					error: "Failed to send metrics",
+					details: result.reason || result.error,
+				});
+			}
+		} catch (error) {
+			console.error("Send metrics error:", error);
+			res.status(500).json({
+				error: "Failed to send metrics",
+				details: error.message,
+			});
+		}
+	},
+);
+
+module.exports = router;

backend/src/routes/settingsRoutes.js

@@ -158,6 +158,7 @@ router.put(
 				logoDark,
 				logoLight,
 				favicon,
+				colorTheme,
 			} = req.body;
 
 			// Get current settings to check for update interval changes
@@ -189,6 +190,7 @@ router.put(
 			if (logoDark !== undefined) updateData.logo_dark = logoDark;
 			if (logoLight !== undefined) updateData.logo_light = logoLight;
 			if (favicon !== undefined) updateData.favicon = favicon;
+			if (colorTheme !== undefined) updateData.color_theme = colorTheme;
 
 			const updatedSettings = await updateSettings(
 				currentSettings.id,

backend/src/server.js

@@ -69,6 +69,7 @@ const dockerRoutes = require("./routes/dockerRoutes");
 const integrationRoutes = require("./routes/integrationRoutes");
 const wsRoutes = require("./routes/wsRoutes");
 const agentVersionRoutes = require("./routes/agentVersionRoutes");
+const metricsRoutes = require("./routes/metricsRoutes");
 const { initSettings } = require("./services/settingsService");
 const { queueManager } = require("./services/automation");
 const { authenticateToken, requireAdmin } = require("./middleware/auth");
@@ -475,6 +476,7 @@ app.use(`/api/${apiVersion}/docker`, dockerRoutes);
 app.use(`/api/${apiVersion}/integrations`, integrationRoutes);
 app.use(`/api/${apiVersion}/ws`, wsRoutes);
 app.use(`/api/${apiVersion}/agent`, agentVersionRoutes);
+app.use(`/api/${apiVersion}/metrics`, metricsRoutes);
 
 // Bull Board - will be populated after queue manager initializes
 let bullBoardRouter = null;
@@ -1200,6 +1202,15 @@ async function startServer() {
 		initAgentWs(server, prisma);
 		await agentVersionService.initialize();
 
+		// Send metrics on startup (silent - no console output)
+		try {
+			const metricsReporting =
+				queueManager.automations[QUEUE_NAMES.METRICS_REPORTING];
+			await metricsReporting.sendSilent();
+		} catch (_error) {
+			// Silent failure - don't block server startup if metrics fail
+		}
+
 		server.listen(PORT, () => {
 			if (process.env.ENABLE_LOGGING === "true") {
 				logger.info(`Server running on port ${PORT}`);

backend/src/services/agentWs.js

@@ -272,7 +272,7 @@ function subscribeToConnectionChanges(apiId, callback) {
 // Handle Docker container status events from agent
 async function handleDockerStatusEvent(apiId, message) {
 	try {
-		const { event, container_id, name, status, timestamp } = message;
+		const { event: _event, container_id, name, status, timestamp } = message;
 
 		console.log(
 			`[Docker Event] ${apiId}: Container ${name} (${container_id}) - ${status}`,

backend/src/services/automation/index.js

@@ -9,6 +9,7 @@ const SessionCleanup = require("./sessionCleanup");
 const OrphanedRepoCleanup = require("./orphanedRepoCleanup");
 const OrphanedPackageCleanup = require("./orphanedPackageCleanup");
 const DockerInventoryCleanup = require("./dockerInventoryCleanup");
+const MetricsReporting = require("./metricsReporting");
 
 // Queue names
 const QUEUE_NAMES = {
@@ -17,6 +18,7 @@ const QUEUE_NAMES = {
 	ORPHANED_REPO_CLEANUP: "orphaned-repo-cleanup",
 	ORPHANED_PACKAGE_CLEANUP: "orphaned-package-cleanup",
 	DOCKER_INVENTORY_CLEANUP: "docker-inventory-cleanup",
+	METRICS_REPORTING: "metrics-reporting",
 	AGENT_COMMANDS: "agent-commands",
 };
 
@@ -95,6 +97,9 @@ class QueueManager {
 			new OrphanedPackageCleanup(this);
 		this.automations[QUEUE_NAMES.DOCKER_INVENTORY_CLEANUP] =
 			new DockerInventoryCleanup(this);
+		this.automations[QUEUE_NAMES.METRICS_REPORTING] = new MetricsReporting(
+			this,
+		);
 
 		console.log("✅ All automation classes initialized");
 	}
@@ -162,6 +167,15 @@ class QueueManager {
 			workerOptions,
 		);
 
+		// Metrics Reporting Worker
+		this.workers[QUEUE_NAMES.METRICS_REPORTING] = new Worker(
+			QUEUE_NAMES.METRICS_REPORTING,
+			this.automations[QUEUE_NAMES.METRICS_REPORTING].process.bind(
+				this.automations[QUEUE_NAMES.METRICS_REPORTING],
+			),
+			workerOptions,
+		);
+
 		// Agent Commands Worker
 		this.workers[QUEUE_NAMES.AGENT_COMMANDS] = new Worker(
 			QUEUE_NAMES.AGENT_COMMANDS,
@@ -219,6 +233,7 @@ class QueueManager {
 		await this.automations[QUEUE_NAMES.ORPHANED_REPO_CLEANUP].schedule();
 		await this.automations[QUEUE_NAMES.ORPHANED_PACKAGE_CLEANUP].schedule();
 		await this.automations[QUEUE_NAMES.DOCKER_INVENTORY_CLEANUP].schedule();
+		await this.automations[QUEUE_NAMES.METRICS_REPORTING].schedule();
 	}
 
 	/**
@@ -248,6 +263,10 @@ class QueueManager {
 		].triggerManual();
 	}
 
+	async triggerMetricsReporting() {
+		return this.automations[QUEUE_NAMES.METRICS_REPORTING].triggerManual();
+	}
+
 	/**
 	 * Get queue statistics
 	 */

backend/src/services/automation/metricsReporting.js

@@ -0,0 +1,175 @@
+const axios = require("axios");
+const { prisma } = require("./shared/prisma");
+const {
+	getSettings,
+	updateSettings,
+} = require("../../services/settingsService");
+
+const METRICS_API_URL =
+	process.env.METRICS_API_URL || "https://metrics.patchmon.cloud";
+
+/**
+ * Metrics Reporting Automation
+ * Sends anonymous usage metrics every 24 hours
+ */
+class MetricsReporting {
+	constructor(queueManager) {
+		this.queueManager = queueManager;
+		this.queueName = "metrics-reporting";
+	}
+
+	/**
+	 * Process metrics reporting job
+	 */
+	async process(_job, silent = false) {
+		const startTime = Date.now();
+		if (!silent) console.log("📊 Starting metrics reporting...");
+
+		try {
+			// Fetch fresh settings directly from database (bypass cache)
+			const settings = await prisma.settings.findFirst({
+				orderBy: { updated_at: "desc" },
+			});
+
+			// Check if metrics are enabled
+			if (settings.metrics_enabled !== true) {
+				if (!silent) console.log("📊 Metrics reporting is disabled");
+				return { success: false, reason: "disabled" };
+			}
+
+			// Check if we have an anonymous ID
+			if (!settings.metrics_anonymous_id) {
+				if (!silent) console.log("📊 No anonymous ID found, skipping metrics");
+				return { success: false, reason: "no_id" };
+			}
+
+			// Get host count
+			const hostCount = await prisma.hosts.count();
+
+			// Get version
+			const packageJson = require("../../../package.json");
+			const version = packageJson.version;
+
+			// Prepare metrics data
+			const metricsData = {
+				anonymous_id: settings.metrics_anonymous_id,
+				host_count: hostCount,
+				version,
+			};
+
+			if (!silent)
+				console.log(
+					`📊 Sending metrics: ${hostCount} hosts, version ${version}`,
+				);
+
+			// Send to metrics API
+			try {
+				const response = await axios.post(
+					`${METRICS_API_URL}/metrics/submit`,
+					metricsData,
+					{
+						timeout: 10000,
+						headers: {
+							"Content-Type": "application/json",
+						},
+					},
+				);
+
+				// Update last sent timestamp
+				await updateSettings(settings.id, {
+					metrics_last_sent: new Date(),
+				});
+
+				const executionTime = Date.now() - startTime;
+				if (!silent)
+					console.log(
+						`✅ Metrics sent successfully in ${executionTime}ms:`,
+						response.data,
+					);
+
+				return {
+					success: true,
+					data: response.data,
+					hostCount,
+					version,
+					executionTime,
+				};
+			} catch (apiError) {
+				const executionTime = Date.now() - startTime;
+				if (!silent)
+					console.error(
+						`❌ Failed to send metrics to API after ${executionTime}ms:`,
+						apiError.message,
+					);
+				return {
+					success: false,
+					reason: "api_error",
+					error: apiError.message,
+					executionTime,
+				};
+			}
+		} catch (error) {
+			const executionTime = Date.now() - startTime;
+			if (!silent)
+				console.error(
+					`❌ Error in metrics reporting after ${executionTime}ms:`,
+					error.message,
+				);
+			// Don't throw on silent mode, just return failure
+			if (silent) {
+				return {
+					success: false,
+					reason: "error",
+					error: error.message,
+					executionTime,
+				};
+			}
+			throw error;
+		}
+	}
+
+	/**
+	 * Schedule recurring metrics reporting (daily at 2 AM)
+	 */
+	async schedule() {
+		const job = await this.queueManager.queues[this.queueName].add(
+			"metrics-reporting",
+			{},
+			{
+				repeat: { cron: "0 2 * * *" }, // Daily at 2 AM
+				jobId: "metrics-reporting-recurring",
+			},
+		);
+		console.log("✅ Metrics reporting scheduled (daily at 2 AM)");
+		return job;
+	}
+
+	/**
+	 * Trigger manual metrics reporting
+	 */
+	async triggerManual() {
+		const job = await this.queueManager.queues[this.queueName].add(
+			"metrics-reporting-manual",
+			{},
+			{ priority: 1 },
+		);
+		console.log("✅ Manual metrics reporting triggered");
+		return job;
+	}
+
+	/**
+	 * Send metrics immediately (silent mode)
+	 * Used for automatic sending on server startup
+	 */
+	async sendSilent() {
+		try {
+			const result = await this.process({ name: "startup-silent" }, true);
+			return result;
+		} catch (error) {
+			// Silent failure on startup
+			return { success: false, reason: "error", error: error.message };
+		}
+	}
+}
+
+module.exports = MetricsReporting;