Connection data not available

### Summary
Connection card displays "No connection data" even when network activity is present on a particular networks. I've use cellular data and separate wifi network.

### Steps to Reproduce
1. Open the dashboard
2. Navigate to the Connection card section
3. Observe the displayed data

### Expected Behavior
Connection card should display relevant connection metrics (e.g., active connections, connection details, or status).

### Actual Behavior
- Connection card shows "No connection data"
- No metrics or details are displayed despite active network usage

### Impact
- Missing visibility into connection-level metrics
- Reduces usefulness of the dashboard
- Makes it difficult to diagnose network issues

### Possible Causes (Speculation)
- Connection data not being collected or sent
- API or data pipeline returning empty response
- UI not properly rendering available data
- Not fetching data from particular networks

### Suggested Fix
- Verify connection data collection
- Ensure API returns valid connection data
- Confirm UI correctly binds and displays connection metrics

### Environment
- OS: Windows 11 (amd64)
- Browser: Edge
- Package: netmon windows amd64
- Release: v1.2.0