feat(chat): enhance chat functionality with web search and article integration

- Updated ChatMessage and ChatWindow components to support inline web search results and articles.
- Integrated new web search and RSS plugins into the chat system for real-time information retrieval.
- Enhanced useContentPanel to manage web search results alongside existing media types.
- Added ArticleOverlay component for displaying selected articles from search results.
- Improved UI elements and styles for better user interaction with web search features.

Made-with: Cursor

packages/app/src/composables/useRssFetch.ts

@@ -0,0 +1,26 @@
+import type { WebSearchResult } from '@aiui/core/types/message'
+
+export async function fetchRssFromUrls(urls: string[]): Promise<WebSearchResult[]> {
+  const safe = urls.filter((u) => typeof u === 'string' && /^https?:\/\//i.test(u.trim())).slice(0, 8)
+  if (safe.length === 0) return []
+
+  try {
+    const params = new URLSearchParams()
+    safe.forEach((u) => params.append('url', u))
+    const res = await fetch(`/api/rss-articles?${params}`, { signal: AbortSignal.timeout(15000) })
+    if (!res.ok) return []
+    const data = (await res.json()) as { articles?: Array<{ title?: string; url?: string; content?: string; imgSrc?: string }> }
+    const articles = data.articles ?? []
+    return articles
+      .filter((a) => a.title && a.url)
+      .map((a) => ({
+        title: a.title ?? '',
+        url: a.url ?? '',
+        content: a.content,
+        imgSrc: a.imgSrc,
+      }))
+  } catch (err) {
+    console.warn('[AIUI rss]', err)
+    return []
+  }
+}