Remove iframe-like scrolling from feed container

- Remove max-height and overflow-y from feed container
- Allows natural page scrolling instead of nested scroll
- Improves browsing experience

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

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

templates/dashboard.html

@@ -440,8 +440,6 @@
 
 .feed-container {
     padding: 0;
-    max-height: calc(100vh - 200px);
-    overflow-y: auto;
 }
 
 .loading {