diff --git a/src/lib/apis/index.ts b/src/lib/apis/index.ts
index 40d0e0392..4987de24e 100644
--- a/src/lib/apis/index.ts
+++ b/src/lib/apis/index.ts
@@ -466,7 +466,7 @@ export const getPipelinesList = async (token: string = '') => {
 		throw error;
 	}
 
-	let pipelines = res?.data ?? [];
+	const pipelines = res?.data ?? [];
 	return pipelines;
 };
 
@@ -609,7 +609,7 @@ export const getPipelines = async (token: string, urlIdx?: string) => {
 		throw error;
 	}
 
-	let pipelines = res?.data ?? [];
+	const pipelines = res?.data ?? [];
 	return pipelines;
 };
 
diff --git a/src/lib/apis/ollama/index.ts b/src/lib/apis/ollama/index.ts
index d4e994312..30bf79246 100644
--- a/src/lib/apis/ollama/index.ts
+++ b/src/lib/apis/ollama/index.ts
@@ -295,7 +295,7 @@ export const generateTextCompletion = async (token: string = '', model: string,
 };
 
 export const generateChatCompletion = async (token: string = '', body: object) => {
-	let controller = new AbortController();
+	const controller = new AbortController();
 	let error = null;
 
 	const res = await fetch(`${OLLAMA_API_BASE_URL}/api/chat`, {
diff --git a/src/lib/components/chat/MessageInput/CallOverlay.svelte b/src/lib/components/chat/MessageInput/CallOverlay.svelte
index 6f3b465a6..75997aafc 100644
--- a/src/lib/components/chat/MessageInput/CallOverlay.svelte
+++ b/src/lib/components/chat/MessageInput/CallOverlay.svelte
@@ -49,7 +49,7 @@
 		const devices = await navigator.mediaDevices.enumerateDevices();
 		videoInputDevices = devices.filter((device) => device.kind === 'videoinput');
 
-		if (!!navigator.mediaDevices.getDisplayMedia) {
+		if (navigator.mediaDevices.getDisplayMedia) {
 			videoInputDevices = [
 				...videoInputDevices,
 				{
diff --git a/src/lib/components/workspace/Models.svelte b/src/lib/components/workspace/Models.svelte
index bcb43e166..7024db2ac 100644
--- a/src/lib/components/workspace/Models.svelte
+++ b/src/lib/components/workspace/Models.svelte
@@ -420,7 +420,7 @@
 						<div class="  font-semibold line-clamp-1">{model.name}</div>
 					</Tooltip>
 					<div class=" text-xs overflow-hidden text-ellipsis line-clamp-1 text-gray-500">
-						{!!model?.info?.meta?.description
+						{model?.info?.meta?.description
 							? model?.info?.meta?.description
 							: model?.ollama?.digest
 								? `${model.id} (${model?.ollama?.digest})`
diff --git a/src/lib/i18n/index.ts b/src/lib/i18n/index.ts
index 172c42f91..982d305df 100644
--- a/src/lib/i18n/index.ts
+++ b/src/lib/i18n/index.ts
@@ -38,10 +38,10 @@ const createIsLoadingStore = (i18n: i18nType) => {
 };
 
 export const initI18n = (defaultLocale: string | undefined) => {
-	let detectionOrder = defaultLocale
+	const detectionOrder = defaultLocale
 		? ['querystring', 'localStorage']
 		: ['querystring', 'localStorage', 'navigator'];
-	let fallbackDefaultLocale = defaultLocale ? [defaultLocale] : ['en-US'];
+	const fallbackDefaultLocale = defaultLocale ? [defaultLocale] : ['en-US'];
 
 	const loadResource = (language: string, namespace: string) =>
 		import(`./locales/${language}/${namespace}.json`);
diff --git a/src/lib/utils/characters/index.ts b/src/lib/utils/characters/index.ts
index af3436693..dff08e66f 100644
--- a/src/lib/utils/characters/index.ts
+++ b/src/lib/utils/characters/index.ts
@@ -74,15 +74,15 @@ const readPngChunks = (data) => {
 
 	if (!isValidPng) throw new Error('Invalid PNG file');
 
-	let chunks = [];
+	const chunks = [];
 	let offset = 8; // Skip PNG signature
 
 	while (offset < data.length) {
-		let length =
+		const length =
 			(data[offset] << 24) | (data[offset + 1] << 16) | (data[offset + 2] << 8) | data[offset + 3];
-		let type = String.fromCharCode.apply(null, data.slice(offset + 4, offset + 8));
-		let chunkData = data.slice(offset + 8, offset + 8 + length);
-		let crc =
+		const type = String.fromCharCode.apply(null, data.slice(offset + 4, offset + 8));
+		const chunkData = data.slice(offset + 8, offset + 8 + length);
+		const crc =
 			(data[offset + 8 + length] << 24) |
 			(data[offset + 8 + length + 1] << 16) |
 			(data[offset + 8 + length + 2] << 8) |
diff --git a/src/lib/utils/marked/katex-extension.ts b/src/lib/utils/marked/katex-extension.ts
index 45374f2f3..a73c72248 100644
--- a/src/lib/utils/marked/katex-extension.ts
+++ b/src/lib/utils/marked/katex-extension.ts
@@ -18,8 +18,8 @@ const DELIMITER_LIST = [
 // const inlineRule = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1(?=[\s?!\.,:？！。，：]|$)/;
 // const blockRule = /^(\${1,2})\n((?:\\[^]|[^\\])+?)\n\1(?:\n|$)/;
 
-let inlinePatterns = [];
-let blockPatterns = [];
+const inlinePatterns = [];
+const blockPatterns = [];
 
 function escapeRegex(string) {
 	return string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
@@ -61,7 +61,7 @@ export default function (options = {}) {
 }
 
 function katexStart(src, displayMode: boolean) {
-	let ruleReg = displayMode ? blockRule : inlineRule;
+	const ruleReg = displayMode ? blockRule : inlineRule;
 
 	let indexSrc = src;
 
@@ -70,7 +70,7 @@ function katexStart(src, displayMode: boolean) {
 		let startIndex = -1;
 		let startDelimiter = '';
 		let endDelimiter = '';
-		for (let delimiter of DELIMITER_LIST) {
+		for (const delimiter of DELIMITER_LIST) {
 			if (delimiter.display !== displayMode) {
 				continue;
 			}
@@ -105,8 +105,8 @@ function katexStart(src, displayMode: boolean) {
 }
 
 function katexTokenizer(src, tokens, displayMode: boolean) {
-	let ruleReg = displayMode ? blockRule : inlineRule;
-	let type = displayMode ? 'blockKatex' : 'inlineKatex';
+	const ruleReg = displayMode ? blockRule : inlineRule;
+	const type = displayMode ? 'blockKatex' : 'inlineKatex';
 
 	const match = src.match(ruleReg);