Extracted shared _port_list.html partial with connected-port checking,
loaded into every page's template set. DeviceView and WallSocket handlers
now load connection data and pass it to the template. Removed duplicate
inline port_list definition from rack.html.
The edit handler was fetching the connection twice but never using the
result, then constructing a new Connection struct without PortID1/PortID2
fields. The DB update would write NULL into both port columns, severing
the cable from both ends. Now the handler fetches the existing row once
and updates only the submitted metadata fields in place.
- Each page template now parsed with base.html separately to avoid content block conflicts
- Connection fragments parsed standalone without base layout
- Increased SQLite max connections to 5 to prevent nested query deadlocks
- Verified connection tracing works through patch panels and wall sockets
Joca