support custom model

sidepanel.html

@@ -29,6 +29,10 @@
           <label class="block text-xs text-gray-500">Apps Script 链接</label>
           <input type="text" id="scriptUrl" class="w-full mt-1 border border-gray-300 rounded px-2 py-1 text-sm focus:ring-1 focus:ring-indigo-500 outline-none" placeholder="输入 Google Apps Script 链接">
         </div>
+        <div>
+          <label class="block text-xs text-gray-500">AI 模型名称</label>
+          <input type="text" id="modelInput" class="w-full mt-1 border border-gray-300 rounded px-2 py-1 text-sm focus:ring-1 focus:ring-indigo-500 outline-none" placeholder="例如：gemini-1.5-flash">
+        </div>
         <button id="saveConfig" class="w-full bg-indigo-600 hover:bg-indigo-700 text-white text-sm py-2 rounded transition-colors">保存设置</button>
       </div>
     </section>

sidepanel.js

@@ -1,6 +1,7 @@
 // DOM Elements
 const apiKeyInput = document.getElementById('apiKey');
 const scriptUrlInput = document.getElementById('scriptUrl');
+const modelInput = document.getElementById('modelInput');
 const saveConfigBtn = document.getElementById('saveConfig');
 const extractLaptopBtn = document.getElementById('extractLaptop');
 const extractPeripheralBtn = document.getElementById('extractPeripheral');
@@ -20,7 +21,7 @@ toggleConfig.addEventListener('click', () => {
 });
 
 // Load settings on startup
-chrome.storage.local.get(['geminiApiKey', 'googleScriptUrl'], (data) => {
+chrome.storage.local.get(['geminiApiKey', 'googleScriptUrl', 'geminiModel'], (data) => {
   if (data.geminiApiKey) {
     apiKeyInput.value = data.geminiApiKey;
     // Fold by default if already configured
@@ -32,13 +33,19 @@ chrome.storage.local.get(['geminiApiKey', 'googleScriptUrl'], (data) => {
     configChevron.classList.add('rotate-180');
   }
   if (data.googleScriptUrl) scriptUrlInput.value = data.googleScriptUrl;
+  if (data.geminiModel) modelInput.value = data.geminiModel;
 });
 
 // Save settings
 saveConfigBtn.addEventListener('click', () => {
   const apiKey = apiKeyInput.value.trim();
   const scriptUrl = scriptUrlInput.value.trim();
-  chrome.storage.local.set({ geminiApiKey: apiKey, googleScriptUrl: scriptUrl }, () => {
+  const model = modelInput.value.trim();
+  chrome.storage.local.set({ 
+    geminiApiKey: apiKey, 
+    googleScriptUrl: scriptUrl,
+    geminiModel: model
+  }, () => {
     updateStatus('已保存', 'bg-green-500 text-white');
     setTimeout(() => updateStatus('待机', 'bg-gray-200 text-gray-600'), 2000);
   });
@@ -50,15 +57,16 @@ extractPeripheralBtn.addEventListener('click', () => handleExtraction('periphera
 sendCustomBtn.addEventListener('click', () => handleExtraction('custom', customInput.value));
 
 async function handleExtraction(type, customText = '') {
-  const { geminiApiKey, googleScriptUrl } = await chrome.storage.local.get(['geminiApiKey', 'googleScriptUrl']);
+  const { geminiApiKey, googleScriptUrl, geminiModel } = await chrome.storage.local.get(['geminiApiKey', 'googleScriptUrl', 'geminiModel']);
   
   if (!geminiApiKey) {
     alert('请先输入 Gemini API 密钥。');
     return;
   }
 
+  const selectedModel = geminiModel || 'gemini-1.5-flash';
   updateStatus('提取中...', 'bg-blue-500 text-white');
-  resultsArea.textContent = '正在读取页面内容...';
+  resultsArea.textContent = `正在使用 ${selectedModel} 读取内容...`;
 
   try {
     // 1. Get current tab content
@@ -89,7 +97,7 @@ Title: ${pageData.title}`;
     }
 
     // 3. Call Gemini API
-    const geminiResult = await callGemini(geminiApiKey, systemPrompt, pageData.text, userPrompt);
+    const geminiResult = await callGemini(geminiApiKey, selectedModel, systemPrompt, pageData.text, userPrompt);
     const cleanedJson = parseGeminiJson(geminiResult);
     
     resultsArea.textContent = JSON.stringify(cleanedJson, null, 2);
@@ -110,8 +118,8 @@ Title: ${pageData.title}`;
   }
 }
 
-async function callGemini(apiKey, systemPrompt, contextText, userPrompt) {
+async function callGemini(apiKey, model, systemPrompt, contextText, userPrompt) {
-  const url = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash-lite:generateContent?key=${apiKey}`;
+  const url = `https://generativelanguage.googleapis.com/v1beta/models/${model}:generateContent?key=${apiKey}`;
   
   const response = await fetch(url, {
     method: 'POST',