diff --git a/src/lib/core/handlers/messageHandler.ts b/src/lib/core/handlers/messageHandler.ts
index 6548d57..0728d3d 100644
--- a/src/lib/core/handlers/messageHandler.ts
+++ b/src/lib/core/handlers/messageHandler.ts
@@ -304,7 +304,7 @@ const handlers: Record<string, (payload: any) => void> = {
 			const content = p.content ?? p.value ?? p.payload;
 			const ref = p.ref ?? '';
 
-			console.log('[Sheet] Notify content received:', {
+			logger.debug('[Sheet] Notify content received:', {
 				msg,
 				target,
 				currentUid,
@@ -597,7 +597,7 @@ export async function handleIncomingMessages(raw: string, clientPrivateKey?: Cry
 			);
 			let actual_message: WSMessage = JSON.parse(decrypted_string);
 			if (actual_message.type !== 'heartbeat') {
-				// console.log(`[WS MSG] type=${actual_message.type}`, actual_message.payload);
+				// logger.debug(`[WS MSG] type=${actual_message.type}`, actual_message.payload);
 			}
 
 			handlers[actual_message.type]?.(actual_message.payload);
@@ -605,7 +605,7 @@ export async function handleIncomingMessages(raw: string, clientPrivateKey?: Cry
 	} else {
 		const msg: WSMessage = parsedMessage;
 		if (msg.type !== 'heartbeat') {
-			// console.log(`[WS MSG] type=${msg.type}`, msg.payload);
+			// logger.debug(`[WS MSG] type=${msg.type}`, msg.payload);
 		}
 		if (msg == null) {
 			// error response
diff --git a/src/lib/core/handlers/ws_messageSender.ts b/src/lib/core/handlers/ws_messageSender.ts
index 90ce2d5..43f7851 100644
--- a/src/lib/core/handlers/ws_messageSender.ts
+++ b/src/lib/core/handlers/ws_messageSender.ts
@@ -117,7 +117,7 @@ export async function sendMessage(
 			data = JSON.stringify(await WebCryptoHelper.encryptMessage(sharedKeyRes, data));
 	}
 
-	// console.log('[WS Send]', {
+	// logger.debug('[WS Send]', {
 	// 	type: logMessage.type,
 	// 	service: logMessage.payload?.srv_name,
 	// 	param: logMessage.payload?.values?.param,
diff --git a/src/lib/core/services/sheetService.ts b/src/lib/core/services/sheetService.ts
index 4c6bec0..2034fb7 100644
--- a/src/lib/core/services/sheetService.ts
+++ b/src/lib/core/services/sheetService.ts
@@ -77,9 +77,9 @@ async function requestPriceSlotOption(country: string, option: string): Promise<
 		stream: true,
 		request_id
 	};
-	console.log('[sheetService] Sending PriceSlot request:', values);
+	logger.debug('[sheetService] Sending PriceSlot request:', values);
 	const sent = await sendCommandRequest('sheet', values);
-	console.log('[sheetService] PriceSlot request sent:', sent);
+	logger.debug('[sheetService] PriceSlot request sent:', sent);
 	if (!sent) {
 		priceSlotsLoading.set(false);
 	}
@@ -95,7 +95,7 @@ export async function updatePriceSlot(
 	slot: PriceSlot,
 	content: SheetRowUpdate[]
 ): Promise<boolean> {
-	// console.log('[sheetService] Sending PriceSlot update:', {
+	// logger.debug('[sheetService] Sending PriceSlot update:', {
 	// 	country,
 	// 	slot: slot.slot,
 	// 	name: slot.name,
@@ -113,7 +113,7 @@ export async function updatePriceSlot(
 		option: `PriceSlot${slot.slot}`
 	});
 
-	console.log('[sheetService] PriceSlot update sent:', {
+	logger.debug('[sheetService] PriceSlot update sent:', {
 		country,
 		slot: slot.slot,
 		sent
@@ -127,7 +127,7 @@ export async function addPriceSlot(
 	slot: PriceSlot,
 	content: SheetRowCreate[]
 ): Promise<boolean> {
-	console.log('[sheetService] Sending PriceSlot create:', {
+	logger.debug('[sheetService] Sending PriceSlot create:', {
 		country,
 		slot: slot.slot,
 		name: slot.name,
@@ -145,7 +145,7 @@ export async function addPriceSlot(
 		option: `PriceSlot${slot.slot}`
 	});
 
-	console.log('[sheetService] PriceSlot create sent:', {
+	logger.debug('[sheetService] PriceSlot create sent:', {
 		country,
 		slot: slot.slot,
 		sent
@@ -168,7 +168,7 @@ export async function addPriceSlotRows(
 		option: `PriceSlot${slot.slot}`
 	});
 
-	console.log('[sheetService] PriceSlot rows add sent:', {
+	logger.debug('[sheetService] PriceSlot rows add sent:', {
 		country,
 		slot: slot.slot,
 		rows: content.length,
@@ -192,7 +192,7 @@ export async function deletePriceSlotRows(
 		option: `PriceSlot${slot.slot}`
 	});
 
-	console.log('[sheetService] PriceSlot rows delete sent:', {
+	logger.debug('[sheetService] PriceSlot rows delete sent:', {
 		country,
 		slot: slot.slot,
 		rows: rowIds.length,
@@ -400,7 +400,7 @@ export async function requestSheetPrice(
 		stream: true,
 		request_id
 	});
-	console.log('[sheetService] Sheet price request sent:', { country, request_id, sent });
+	logger.debug('[sheetService] Sheet price request sent:', { country, request_id, sent });
 
 	if (sent) {
 		markSheetPriceAsSent('price');
@@ -431,7 +431,7 @@ export async function requestAllSheetPrice(country: string, force = false): Prom
 
 	sheetPriceLoading.set(true);
 
-	console.log('[sheetService] Sending all sheet price request:', { country, request_id });
+	logger.debug('[sheetService] Sending all sheet price request:', { country, request_id });
 
 	const sent = await sendCommandRequest('sheet', {
 		country,
diff --git a/src/lib/core/stores/sheetStore.ts b/src/lib/core/stores/sheetStore.ts
index 33a09a4..5f3c741 100644
--- a/src/lib/core/stores/sheetStore.ts
+++ b/src/lib/core/stores/sheetStore.ts
@@ -213,7 +213,7 @@ function getPriceSlotItems(content: any): any[] {
 }
 
 export function handlePriceSlotsResponse(content: any) {
-	console.log('[PriceSlot] Raw backend response:', {
+	logger.debug('[PriceSlot] Raw backend response:', {
 		items: Array.isArray(content) ? content.length : undefined,
 		keys:
 			content && typeof content === 'object' && !Array.isArray(content) ? Object.keys(content) : []
@@ -246,7 +246,7 @@ export function handlePriceSlotsResponse(content: any) {
 		return;
 	}
 
-	console.log('[PriceSlot] Normalized slots:', {
+	logger.debug('[PriceSlot] Normalized slots:', {
 		country,
 		slots: normalizedSlots.length,
 		firstSlot: normalizedSlots[0]
@@ -806,7 +806,7 @@ export function handleRawStreamChunk(subtype: string, payload: any) {
 		targetSubtype = 'priceslot';
 	}
 
-	console.log(
+	logger.debug(
 		`[RawStream] Chunk ${payload.idx} for ${targetSubtype}, raw length:`,
 		payload.raw?.length
 	);
@@ -857,7 +857,7 @@ export function handleRawStreamEnd(subtype: string, payload: any) {
 		targetSubtype = 'priceslot';
 	}
 
-	console.log(`[RawStream] End payload for ${targetSubtype}:`, payload);
+	logger.debug(`[RawStream] End payload for ${targetSubtype}:`, payload);
 
 	const streamData = currentData[targetSubtype];
 
diff --git a/src/routes/api/catalog-create/+server.ts b/src/routes/api/catalog-create/+server.ts
index 6732913..895e6ce 100644
--- a/src/routes/api/catalog-create/+server.ts
+++ b/src/routes/api/catalog-create/+server.ts
@@ -29,7 +29,7 @@ export const POST: RequestHandler = async ({ request }) => {
 			`${API_BASE}/catalog/create/${encodeURIComponent(country)}/${encodeURIComponent(uid)}` +
 			`/${encodeURIComponent(displayName)}/${encodeURIComponent(email)}`;
 
-		console.log('[Catalog Create Proxy] Endpoint:', endpoint, 'slug:', slug);
+		logger.debug('[Catalog Create Proxy] Endpoint:', endpoint, 'slug:', slug);
 
 		const upstream = new FormData();
 		upstream.append('slug', slug);
diff --git a/src/routes/api/video-mainpage/+server.ts b/src/routes/api/video-mainpage/+server.ts
index 0bc4e3d..af16650 100644
--- a/src/routes/api/video-mainpage/+server.ts
+++ b/src/routes/api/video-mainpage/+server.ts
@@ -43,7 +43,7 @@ export const POST: RequestHandler = async ({ request }) => {
 			`${API_BASE}/video/mainpage/${encodeURIComponent(uid)}` +
 			`/${encodeURIComponent(displayName)}/${encodeURIComponent(email)}`;
 
-		console.log('[Video MainPage Proxy] Endpoint:', endpoint, 'name:', name);
+		logger.debug('[Video MainPage Proxy] Endpoint:', endpoint, 'name:', name);
 
 		const upstream = new FormData();
 		upstream.append('name', name);