fix: SearXNG 配置完全失效 — 三层根因修复

根因1: 工具定义暴露 max_results/fetch_top 给 AI, AI 自行决定传 10 覆盖配置面板的 30

修复1: 从工具参数移除 max_results/fetch_top, 配置面板为唯一权威, AI 不可覆盖

根因2: 缓存 key 不含 maxResults/fetchTop, 配置变更后命中旧缓存返回错误结果数

修复2: 缓存 key 加入 maxResults 和 fetchTop

根因3: SearXNG API 用非标准 results_count 参数, 标准实例不认, 每页只返回约 10 条

修复3: 改用标准 pageno 分页, 多页获取直到达到 maxResults 或无更多结果

附加: 添加日志输出实际 maxResults/fetchTop 便于调试

electron/harness/tools/built-in/web-search.ts

@@ -228,10 +228,8 @@ export class WebSearchTool implements IMetonaTool {
       type: 'object',
       properties: {
         query: { type: 'string', description: 'Search query keywords' },
-        max_results: { type: 'number', description: 'Maximum results (default 30, max 30)' },
         time_range: { type: 'string', description: 'Time filter: day, week, month, year (optional)' },
         enhance_snippets: { type: 'boolean', description: 'Auto-enhance short snippets (default true)' },
-        fetch_top: { type: 'number', description: 'Auto-fetch full content for top N results (3-8, default 5)' },
       },
       required: ['query'],
     },
@@ -252,21 +250,19 @@ export class WebSearchTool implements IMetonaTool {
     // 读取 SearXNG 配置（提前读取，使工具参数默认值与配置一致）
     const searxngConfig = this.readSearXNGConfig();
 
-    // max_results: 配置面板为下限，AI 参数不得低于配置值，上限 30
+    // max_results: 仅由配置面板控制，AI 不可覆盖
-    const argMaxResults = (args.max_results as number) ?? undefined;
+    const maxResults = Math.min(50, Math.max(1, searxngConfig.max_results > 0 ? searxngConfig.max_results : 30));
-    const cfgMaxResults = searxngConfig.max_results > 0 ? searxngConfig.max_results : undefined;
-    const maxResults = Math.min(30, Math.max(1, argMaxResults ?? 30, cfgMaxResults ?? 0));
 
     const timeRange = (args.time_range as string) ?? '';
     const enhanceSnippets = (args.enhance_snippets as boolean) ?? true;
 
-    // fetch_top: 配置面板为下限，AI 参数不得低于配置值，上限 8
+    // fetch_top: 仅由配置面板控制，AI 不可覆盖
-    const argFetchTop = (args.fetch_top as number) ?? undefined;
+    const fetchTop = Math.min(8, Math.max(3, searxngConfig.fetch_count > 0 ? searxngConfig.fetch_count : 5));
-    const cfgFetchCount = searxngConfig.fetch_count > 0 ? searxngConfig.fetch_count : undefined;
-    const fetchTop = Math.min(8, Math.max(3, argFetchTop ?? 5, cfgFetchCount ?? 0));
 
-    // 缓存检查（缓存 key 含 SearXNG 模式，避免切换后返回旧缓存）
+    logTool('web_search', `Config: maxResults=${maxResults}, fetchTop=${fetchTop}, searxng=${searxngConfig.enabled}`);
-    const cacheKey = `${searxngConfig.enabled ? 'searxng' : 'builtin'}:${normalizeUrl(query).toLowerCase()}`;
+
+    // 缓存检查（key 含模式 + maxResults + fetchTop，避免配置变更后返回旧缓存）
+    const cacheKey = `${searxngConfig.enabled ? 'searxng' : 'builtin'}:${maxResults}:${fetchTop}:${normalizeUrl(query).toLowerCase()}`;
     const cached = searchCache.get(cacheKey);
     if (cached) {
       logTool('web_search', `Cache hit: "${query}"`);
@@ -349,58 +345,82 @@ export class WebSearchTool implements IMetonaTool {
     maxResults: number,
     timeRange: string,
   ): Promise<{ results: SearchResult[]; engineStats: Record<string, string> }> {
-    const params = new URLSearchParams();
-    params.set('q', query);
-    params.set('format', config.format || 'json');
-    if (config.engines) params.set('engines', config.engines);
-    if (config.language && config.language !== 'auto') params.set('language', config.language);
-    params.set('safesearch', String(config.safesearch));
-    const tr = timeRange || config.time_range;
-    if (tr) params.set('time_range', tr);
-    const limit = Math.max(maxResults, config.max_results);
-    if (limit > 0) params.set('results_count', String(limit));
-
-    const searchUrl = `${config.url.replace(/\/$/, '')}/search?${params.toString()}`;
-    const headers = buildSearXNGAuthHeaders(config.auth_key, config.auth_type);
-
-    logTool('web_search', `[SearXNG] Fetching: ${searchUrl}`);
-
-    const response = await fetchWithTimeout(searchUrl, { headers }, 15_000);
-    if (!response.ok) {
-      throw new Error(`SearXNG API error: ${response.status} ${response.statusText}`);
-    }
-
     const results: SearchResult[] = [];
     const engineStats: Record<string, string> = {};
     const engineCounts = new Map<string, number>();
+    const baseUrl = config.url.replace(/\/$/, '');
+    const headers = buildSearXNGAuthHeaders(config.auth_key, config.auth_type);
+    const tr = timeRange || config.time_range;
 
-    if (config.format === 'html') {
+    // SearXNG 标准分页：每页由实例配置决定（通常 10 条），用 pageno 翻页直到达到 maxResults
-      const html = await response.text();
+    const maxPages = Math.ceil(maxResults / 5) + 1; // 保守估计，每页至少 5 条
-      // HTML 模式：简单提取链接和标题
+    let page = 1;
-      const matches = html.matchAll(/<a[^>]*href="(https?:\/\/[^"]+)"[^>]*>([\s\S]*?)<\/a>/gi);
+
-      for (const m of matches) {
+    while (results.length < maxResults && page <= maxPages) {
-        const url = m[1];
+      const params = new URLSearchParams();
-        const title = m[2].replace(/<[^>]+>/g, '').trim();
+      params.set('q', query);
-        if (title && url && !url.includes(config.url)) {
+      params.set('format', config.format || 'json');
-          results.push({ title, url, snippet: '', engine: 'searxng', weight: 85 });
+      params.set('pageno', String(page));
+      if (config.engines) params.set('engines', config.engines);
+      if (config.language && config.language !== 'auto') params.set('language', config.language);
+      params.set('safesearch', String(config.safesearch));
+      if (tr) params.set('time_range', tr);
+
+      const searchUrl = `${baseUrl}/search?${params.toString()}`;
+      logTool('web_search', `[SearXNG] Fetching page ${page}: ${searchUrl}`);
+
+      let pageResults: SearchResult[] = [];
+
+      try {
+        const response = await fetchWithTimeout(searchUrl, { headers }, 15_000);
+        if (!response.ok) {
+          throw new Error(`SearXNG API error: ${response.status} ${response.statusText}`);
         }
+
+        if (config.format === 'html') {
+          const html = await response.text();
+          const matches = html.matchAll(/<a[^>]*href="(https?:\/\/[^"]+)"[^>]*>([\s\S]*?)<\/a>/gi);
+          for (const m of matches) {
+            const url = m[1];
+            const title = m[2].replace(/<[^>]+>/g, '').trim();
+            if (title && url && !url.includes(config.url)) {
+              pageResults.push({ title, url, snippet: '', engine: 'searxng', weight: 85 });
+            }
+          }
+        } else {
+          const data = await response.json() as { results?: Array<Record<string, unknown>> };
+          for (const item of data.results ?? []) {
+            const url = item.url as string;
+            const title = item.title as string;
+            const snippet = item.content as string;
+            const engine = (item.engine as string) ?? 'searxng';
+            pageResults.push({ title, url, snippet: snippet ?? '', engine, weight: 85 });
+            engineCounts.set(engine, (engineCounts.get(engine) ?? 0) + 1);
+          }
+        }
+      } catch (err) {
+        logTool('web_search', `[SearXNG] Page ${page} error: ${(err as Error).message}`);
+        // 第一页就失败则抛出，后续页失败则用已获取的结果
+        if (page === 1) throw err;
+        break;
       }
-    } else {
+
-      const data = await response.json() as { results?: Array<Record<string, unknown>> };
+      // 本页无新结果 → 已到末尾
-      for (const item of data.results ?? []) {
+      if (pageResults.length === 0) {
-        const url = item.url as string;
+        logTool('web_search', `[SearXNG] Page ${page} returned 0 results, stopping pagination`);
-        const title = item.title as string;
+        break;
-        const snippet = item.content as string;
-        const engine = (item.engine as string) ?? 'searxng';
-        results.push({ title, url, snippet: snippet ?? '', engine, weight: 85 });
-        engineCounts.set(engine, (engineCounts.get(engine) ?? 0) + 1);
       }
+
+      results.push(...pageResults);
+      logTool('web_search', `[SearXNG] Page ${page}: +${pageResults.length} (total ${results.length})`);
+      page++;
     }
 
     for (const [engine, count] of engineCounts) {
       engineStats[engine] = `${count} 条`;
     }
 
+    logTool('web_search', `[SearXNG] Total: ${results.length} raw results (target ${maxResults})`);
     return { results, engineStats };
   }