chore: configure eslint and update gitignore

preload.js

@@ -1,5 +1,17 @@
 const { contextBridge, ipcRenderer } = require('electron');
 
+// 加载jsQR库
+let jsQRLib = null;
+try {
+    // 直接require jsqr模块
+    const jsqrModule = require('jsqr');
+    // 处理ES module的default export
+    jsQRLib = jsqrModule.default || jsqrModule;
+    console.log('jsQR loaded successfully:', typeof jsQRLib);
+} catch (e) {
+    console.error('Failed to load jsQR:', e);
+}
+
 contextBridge.exposeInMainWorld('api', {
     // Vault operations
     getVaults: () => ipcRenderer.invoke('db:getVaults'),
@@ -17,5 +29,39 @@ contextBridge.exposeInMainWorld('api', {
     searchAccounts: (query, vaultId) => ipcRenderer.invoke('db:searchAccounts', query, vaultId),
 
     // Clipboard
-    copyToClipboard: (text) => ipcRenderer.invoke('clipboard:write', text)
+    copyToClipboard: (text) => ipcRenderer.invoke('clipboard:write', text),
+
+
+    // Screenshot
+    captureScreen: () => ipcRenderer.invoke('screen:capture'),
+
+    // QR Code parsing
+    decodeQR: (imageData, width, height) => {
+        if (!jsQRLib) {
+            console.error('jsQR not loaded');
+            return null;
+        }
+        try {
+            // 确保是Uint8ClampedArray格式
+            const data = imageData instanceof Uint8ClampedArray
+                ? imageData
+                : new Uint8ClampedArray(imageData);
+
+            console.log('Decoding QR, image size:', width, 'x', height, 'data length:', data.length);
+            const result = jsQRLib(data, width, height);
+
+            if (result) {
+                console.log('QR code found:', result.data);
+                return result.data;
+            } else {
+                console.log('No QR code found in image');
+                return null;
+            }
+        } catch (e) {
+            console.error('QR decode error:', e);
+            return null;
+        }
+    },
+    hasJsQR: () => !!jsQRLib,
+
 });