Add poll source editing and expanded settings

- Update admin_polling_add to accept max_posts, fetch_comments, priority
- Enhance admin_polling_update to modify all configurable fields
- Support editing display_name, interval, max_posts, fetch_comments, priority

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -1350,6 +1350,9 @@ def admin_polling_add():
     custom_source_id = request.form.get('custom_source_id')
     display_name = request.form.get('display_name')
     poll_interval = int(request.form.get('poll_interval', 60))
+    max_posts = int(request.form.get('max_posts', 100))
+    fetch_comments = request.form.get('fetch_comments', 'true') == 'true'
+    priority = request.form.get('priority', 'medium')
 
     # Use custom source if provided, otherwise use dropdown
     if custom_source_id and custom_source_id.strip():
@@ -1371,6 +1374,9 @@ def admin_polling_add():
         source_id=source_id,
         display_name=display_name,
         poll_interval_minutes=poll_interval,
+        max_posts=max_posts,
+        fetch_comments=fetch_comments,
+        priority=priority,
         enabled=False,
         created_by=current_user.id
     )
@@ -1423,11 +1429,24 @@ def admin_polling_update(source_id):
         flash('Source not found', 'error')
         return redirect(url_for('admin_polling'))
 
-    poll_interval = request.form.get('poll_interval')
-    if poll_interval:
-        source.poll_interval_minutes = int(poll_interval)
+    # Update all configurable fields
+    if request.form.get('poll_interval'):
+        source.poll_interval_minutes = int(request.form.get('poll_interval'))
+
+    if request.form.get('max_posts'):
+        source.max_posts = int(request.form.get('max_posts'))
+
+    if request.form.get('fetch_comments') is not None:
+        source.fetch_comments = request.form.get('fetch_comments') == 'true'
+
+    if request.form.get('priority'):
+        source.priority = request.form.get('priority')
+
+    if request.form.get('display_name'):
+        source.display_name = request.form.get('display_name')
+
     db.session.commit()
-        flash(f'Updated interval for {source.display_name}', 'success')
+    flash(f'Updated settings for {source.display_name}', 'success')
 
     return redirect(url_for('admin_polling'))