Implement hybrid approach for AI news

- Update ainews script to detect OpenAI URLs and mark as NEEDS_WEB_FETCH
- Update TOOLS.md with content availability table and hybrid workflow
- Update all 4 AI news cron jobs (10:05, 14:05, 18:05, 22:05) with hybrid instructions
  - Simon/Raschka: use ainews articles (fivefilters works)
  - OpenAI: use web_fetch tool (JS-heavy site)

TOOLS.md

@@ -103,7 +103,7 @@ curl -s -X REPORT -u "$NEXTCLOUD_USER:$NEXTCLOUD_PASS" \
   "$NEXTCLOUD_URL/remote.php/dav/calendars/$NEXTCLOUD_USER/$CALDAV_CALENDAR/"
 ```
 
-## AI News RSS
+## AI News RSS (Hybrid Approach)
 
 Helper script: `~/bin/ainews`
 
@@ -120,10 +120,18 @@ ainews reset                # Clear seen history
 - Auto-tracks seen articles in `memory/ainews-seen.txt`
 - Auto-prunes to 200 entries
 
-**Workflow for AI news briefing:**
-1. `ainews items` → shows NEW articles, marks them as seen
-2. Pick interesting ones, optionally fetch full content with `articles`
-3. Next briefing: only shows articles published since last check
+**Content availability by source:**
+| Source | Full Content | Method |
+|--------|-------------|--------|
+| Simon Willison | ✅ In RSS/fivefilters | `ainews articles` |
+| Sebastian Raschka | ✅ In RSS/fivefilters | `ainews articles` |
+| OpenAI Blog | ❌ JS-rendered | Use `web_fetch` tool |
+
+**Hybrid workflow for AI news briefing:**
+1. `ainews items` → shows NEW articles from all sources
+2. For Simon/Raschka: `ainews articles <urls>` to get full content
+3. For OpenAI: Use `web_fetch` tool directly (fivefilters can't extract JS sites)
+4. Write briefing with all content
 
 ---