Big AI News — Multi-Source AI News Aggregator

Fetch AI news from multiple sources, deduplicate overlapping stories, merge into one categorized digest.

Default Sources

Fetch from all sources in parallel (independent, no ordering dependency):

#	Source	URL	Method
1	TechNews 科技新報	`https://technews.tw/category/ai/`	web_fetch; fallback `web_search` with `site:technews.tw AI` + `freshness: day`
2	量子位 QbitAI	`https://www.qbitai.com/`	web_search `site:qbitai.com` + `freshness: day` (direct fetch returns 403)
3	科技岛 TechNice	`https://www.technice.com.tw/category/issues/ai/`	web_fetch; fallback `web_search` with `site:technice.com.tw AI` + `freshness: day`
4	AIBase	`https://news.aibase.com/zh/daily`	web_fetch to get latest digest link, then fetch the first (most recent) digest page

If the user specifies specific sources, only use those. If they say "all" or don't specify, use all four defaults.