feat: SearXNG 添加 format 参数，支持 json/html 两种模式。html 模式提取网页纯文本交由 AI 自行分析

src/main/tool-handlers-system.ts

@@ -456,10 +456,11 @@ async function handleWebSearchSearxng(
   const cfgTimeRange = getSetting<string>('searxng_time_range', '');
   const effectiveTimeRange = timeRange || cfgTimeRange;
 
-  const params = new URLSearchParams({
+  const format = getSetting<string>('searxng_format', 'json');
-    q: query,
+  const isHtml = format === 'html';
-    format: 'json',
+
-  });
+  const params = new URLSearchParams({ q: query });
+  if (!isHtml) params.set('format', 'json');
   if (engines) params.set('engines', engines);
   if (language) params.set('language', language);
   if (safesearch > 0) params.set('safesearch', String(safesearch));
@@ -468,18 +469,36 @@ async function handleWebSearchSearxng(
   const authKey = getSetting<string>('searxng_auth_key', '');
 
   const apiUrl = `${url.replace(/\/+$/, '')}/search?${params.toString()}`;
-  sendLog('info', `🔍 SearXNG 搜索`, `"${query}" → ${url}`);
+  sendLog('info', `🔍 SearXNG 搜索`, `${query} → ${url} (${format})`);
 
   try {
     const headers = buildFetchHeaders(apiUrl, false);
     if (authKey) headers['Authorization'] = `Bearer ${authKey}`;
     const resp = await fetchWithTimeout(apiUrl, HTTP_TIMEOUT, headers);
     if (!resp || !resp.ok) {
-      const fallbackUrl = encodeURIComponent(query);
       return {
         success: false,
-        error: `SearXNG 搜索失败 (HTTP ${resp?.status || 'timeout'})。请检查 SearXNG 实例是否运行正常：${url}。你也可以在设置中禁用 SearXNG 回退到内置四引擎搜索。`,
+        error: `SearXNG 搜索失败 (HTTP ${resp?.status || 'timeout'})。请检查 SearXNG 实例是否运行正常：${url}。`,
-        _searxng_fallback: `${url}/search?q=${fallbackUrl}`
+        _searxng_url: apiUrl
+      };
+    }
+
+    // ── HTML 模式：返回原始网页文本，让 AI 自行分析 ──
+    if (isHtml) {
+      const html = await resp.text();
+      const text = htmlToText(html);
+      const truncated = maxResults > 0 && text.length > maxResults * 500;
+      const content = truncated ? text.slice(0, maxResults * 500) + '\n...（已截断）' : text;
+      sendLog('success', `🔍 SearXNG HTML 完成`, `${text.length} 字符`);
+      return {
+        success: true,
+        url: apiUrl,
+        content,
+        content_type: 'text/html',
+        length: content.length,
+        truncated,
+        format: 'html',
+        _hint: '这是 SearXNG 搜索结果页面的纯文本提取。请从中提取有用的搜索结果信息来回答用户问题。'
       };
     }
 

src/renderer/components/searxng-modal.ts

@@ -17,6 +17,7 @@ const DEFAULTS = {
   time_range: '',
   max_results: 20,
   auth_key: '',
+  format: 'json',
 };
 
 let modalEl: HTMLElement;
@@ -35,6 +36,7 @@ async function saveConfig(db: ChatDB): Promise<void> {
   await db.saveSetting('searxng_time_range', searxngConfig.time_range);
   await db.saveSetting('searxng_max_results', searxngConfig.max_results);
   await db.saveSetting('searxng_auth_key', searxngConfig.auth_key);
+  await db.saveSetting('searxng_format', searxngConfig.format);
   logSuccess('SearXNG 配置已保存');
 }
 
@@ -48,6 +50,7 @@ export async function loadSearxngConfig(db: ChatDB): Promise<void> {
   searxngConfig.time_range = await db.getSetting('searxng_time_range', DEFAULTS.time_range);
   searxngConfig.max_results = await db.getSetting('searxng_max_results', DEFAULTS.max_results);
   searxngConfig.auth_key = await db.getSetting('searxng_auth_key', DEFAULTS.auth_key);
+  searxngConfig.format = await db.getSetting('searxng_format', DEFAULTS.format);
   logInfo('SearXNG 配置已加载', searxngConfig.enabled ? `已启用: ${searxngConfig.url}` : '未启用');
 }
 
@@ -60,6 +63,7 @@ function syncFormFromConfig(): void {
   (document.querySelector('#searxngTimeRange') as HTMLSelectElement).value = searxngConfig.time_range || '';
   (document.querySelector('#searxngMaxResults') as HTMLInputElement).value = String(searxngConfig.max_results);
   (document.querySelector('#searxngAuthKey') as HTMLInputElement).value = searxngConfig.auth_key;
+  (document.querySelector('#searxngFormat') as HTMLSelectElement).value = searxngConfig.format;
   const toggle = document.querySelector('#toggleSearxngEnabled') as HTMLInputElement;
   toggle.checked = searxngConfig.enabled;
   updateEnabledUI(searxngConfig.enabled);
@@ -132,6 +136,7 @@ export function initSearxngModal(): void {
     searxngConfig.time_range = (document.querySelector('#searxngTimeRange') as HTMLSelectElement).value;
     searxngConfig.max_results = parseInt((document.querySelector('#searxngMaxResults') as HTMLInputElement).value) || 20;
     searxngConfig.auth_key = (document.querySelector('#searxngAuthKey') as HTMLInputElement).value.trim();
+    searxngConfig.format = (document.querySelector('#searxngFormat') as HTMLSelectElement).value;
     const db = state.get<ChatDB | null>(KEYS.DB);
     if (db) await saveConfig(db);
     updateEnabledUI(searxngConfig.enabled);

src/renderer/index.html

@@ -776,6 +776,13 @@
                     <label class="setting-label">单次结果数</label>
                     <input class="setting-input" id="searxngMaxResults" type="number" min="1" max="50" step="1" value="20" style="margin-bottom:0;">
                 </div>
+                <div class="setting-group">
+                    <label class="setting-label">返回格式</label>
+                    <select class="setting-input" id="searxngFormat" style="margin-bottom:0;">
+                        <option value="json">JSON（结构化解析）</option>
+                        <option value="html">HTML（原始网页，AI 自行分析）</option>
+                    </select>
+                </div>
             </div>
 
             <div class="setting-group">