chore: migrated to typescript

src/background.ts

@@ -0,0 +1,20 @@
+// Handle tab updates to inject content script
+chrome.tabs.onUpdated.addListener((tabId: number, changeInfo: chrome.tabs.TabChangeInfo, tab: chrome.tabs.Tab): void => {
+    if (changeInfo.status === 'complete' && tab.url && /^https?:/.test(tab.url)) {
+        chrome.scripting.executeScript({
+            target: { tabId },
+            files: ['dist/main.js']
+        }).catch((err: unknown) => {
+            console.warn('Injection failed:', err);
+        });
+    }
+});
+
+// Initialize storage on extension install
+chrome.runtime.onInstalled.addListener((): void => {
+    chrome.storage.local.get(['exceptionsList'], (result: any) => {
+        if (!result.exceptionsList) {
+            chrome.storage.local.set({ exceptionsList: [] });
+        }
+    });
+});