Home, knowledge, and video layout fixes
Fixed home icons, article reading layout, aligned video cards, recent updates, and chat timestamps.
# Home, knowledge, and video layout fixes
This update focuses on visible layout issues that affect everyday browsing.
## Changes
- Anonymous chat now shows time only for today, and date plus time for older messages.
- Removed the knowledge-base top toolbar to give more room to content.
- Article detail pages hide the left category list; categories only appear on the knowledge home view.
- Article title, summary, and body now sit in one reading panel.
- Video cards now use consistent sizes, title slots, summary slots, and button positions to avoid uneven rows or overlap.
- Home desktop icons no longer use the blue background frame and are moved lower so they are fully visible.
- Home copy and section title bars are no longer text-selectable, reducing accidental drag selection.
- The three under-construction sections now use clear Developing copy and keep labels on one line.
- The welcome popup recent updates area shows the latest 5 posts, with new posts automatically pushing older ones out.
