Add per-server connection testing with detailed error reporting:
- Test Connection button tests each ElectrumX server individually
- Shows streaming results: ✅ success with response time, ❌ failure
with human-readable error (TLS handshake failed, connection refused,
timeout, DNS failed, invalid response, etc.)
- Diagnostic card shows: last test timestamp + success count, device
info (manufacturer/model/Android/API), TLS version negotiated
- ElectrumXClient.testServer() method for single-server diagnostics
with TLS version capture from SSL session
This gives users (and bug reporters) immediate visibility into why
Namecoin resolution may be failing silently on their device.
M
49698de99c