feat: WebSearch markdown add image link can show image

src/tools/WebSearchTool/WebSearchTool.ts

@@ -25,6 +25,7 @@ const searchResultSchema = lazySchema(() => {
     title: z.string(),
     url: z.string(),
     snippet: z.string().optional(),
+    image: z.string().optional(),
   })
 
   return z.object({
@@ -53,7 +54,7 @@ import type { WebSearchProgress } from '../../types/tools.js'
  */
 async function searchSearXNG(
   query: string
-): Promise<Array<{ title: string; url: string; snippet?: string }>> {
+): Promise<Array<{ title: string; url: string; snippet?: string; image?: string }>> {
   try {
     const url = new URL('http://localhost:8080/search')
     url.searchParams.set('q', query)
@@ -85,6 +86,7 @@ async function searchSearXNG(
         title: r.title,
         url: r.url,
         snippet: r.content,
+        image: r.thumbnail || undefined,
       }))
   } catch (error) {
     logError('SearXNG search failed', error)
@@ -99,7 +101,7 @@ async function searchSearXNG(
  */
 async function searchTavily(
   query: string
-): Promise<Array<{ title: string; url: string; snippet?: string }>> {
+): Promise<Array<{ title: string; url: string; snippet?: string; image?: string }>> {
   try {
     const apiKey = process.env.TAVILY_API_KEY
     if (!apiKey) {
@@ -117,6 +119,7 @@ async function searchTavily(
       title: r.title,
       url: r.url,
       snippet: r.content,
+      image: r.img || r.image || undefined,
     }))
   } catch (error) {
     logError('Tavily search failed', error)
@@ -295,7 +298,8 @@ export const WebSearchTool = buildTool({
         text += r + '\n\n'
       } else {
         r.content.forEach((item: any, i: number) => {
-          text += `${i + 1}. ${item.title}\n${item.url}\n${item.snippet || ''}\n\n`
+          const imgLine = item.image ? `\n![${item.title}](${item.image})\n` : ''
+          text += `${i + 1}. ${item.title}\n${item.url}\n${item.snippet || ''}${imgLine}\n`
         })
       }
     }

src/tools/WebSearchTool/prompt.ts

@@ -19,6 +19,12 @@ Search Strategy:
   - If results are weak or empty, try rephrasing the query
   - Prefer more specific queries when possible (add keywords, version numbers, or context)
 
+Search Result Format:
+  - Each search result includes: title, URL, snippet, and optionally an image URL (thumbnail)
+  - You can use images in your response via markdown syntax: ![alt text](image_url)
+  - When search results include images, incorporate them into your answer for a richer,图文混排 experience
+  - Images make responses much more readable — use them whenever available
+
 CRITICAL REQUIREMENT - You MUST follow this:
   - After answering the user's question, you MUST include a "Sources:" section at the end of your response
   - In the Sources section, list relevant URLs from the search results as markdown hyperlinks: [Title](URL)