fix(#483): Button and buzzer sits above the public key

Owner placement. Node Settings order is now node name, location, GPS
enable, Button and buzzer, public key.

Epic: #474, #475
Agent: CalmBay (session d14220d9)

lib/screens/settings_screen.dart

@@ -258,20 +258,8 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   },
                 ),
               ],
-              if (connector.selfPublicKey != null) ...[
-                const Divider(height: 1),
-                Padding(
-                  padding: const EdgeInsets.fromLTRB(16, 8, 16, 12),
-                  child: _buildInfoRow(
-                    l10n.settings_infoPublicKey,
-                    pubKeyToHex(connector.selfPublicKey!),
-                    copyValue: pubKeyToHex(connector.selfPublicKey!),
-                  ),
-                ),
-              ],
               // Button and buzzer: device UI config (#474/#475). Owner-placed
-              // under Node Settings, appended last so nothing already here
-              // moves.
+              // under Node Settings, directly above the public key.
               //
               // Gated STRICTLY on the capability bits. A radio without the
               // hardware has no button to configure, so it gets no tile, no
@@ -304,6 +292,17 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   },
                 ),
               ],
+              if (connector.selfPublicKey != null) ...[
+                const Divider(height: 1),
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 8, 16, 12),
+                  child: _buildInfoRow(
+                    l10n.settings_infoPublicKey,
+                    pubKeyToHex(connector.selfPublicKey!),
+                    copyValue: pubKeyToHex(connector.selfPublicKey!),
+                  ),
+                ),
+              ],
             ],
           ),
         ),