refactor(dns/network): replace dnsResolvableName with hostname and restructure DNS record generation

- Replaced `dnsResolvableName` with `hostname` in device configuration options
- Updated DNS record generation logic to use `hostname` instead of domain-based naming
- Removed deprecated `dnsResolvableName` option from network module
- Restructured DNS record templates to use consistent formatting
- Simplified code structure by removing redundant whitespace and reorganizing attribute definitions
- Updated `generateDeviceHostRecords` to use new naming convention and improved template syntax

modules/core/dns.nix

@@ -122,21 +122,22 @@ in
           generateDeviceHostRecords =
             let
               generateRecordsForInterface = ifaceName: ifaceConfig:
-                lib.concatStringsSep "\n" (lib.mapAttrsToList (deviceName: deviceConfig:
-                  if deviceConfig.dnsResolvableName != null then
+                lib.concatStringsSep "\n" (lib.mapAttrsToList
+                  (deviceName: deviceConfig:
+                    if deviceConfig.hostname!= null then
                       let
-                      serverIP = deviceConfig.address;
-                      interfaceNet = ifaceConfig.net;
-                      domain = deviceConfig.dnsResolvableName;
+                        deviceAddress = deviceConfig.address;
+                        deviceIface = ifaceConfig.net;
+                        deviceHost = deviceConfig.hostname;
                       in
                       ''
-                      ${domain} {
+                        ${deviceHost} {
                           view ${ifaceName} {
-                          expr incidr(client_ip(), '${interfaceNet}')
+                            expr incidr(client_ip(), '${deviceIface}')
                           }
 
-                        template IN A ${domain} {
-                          answer "${domain}. 60 IN A ${serverIP}"
+                          template IN A ${deviceHost} {
+                            answer "${deviceHost}. 60 IN A ${deviceAddress}"
                           }
 
                           cache
@@ -144,7 +145,8 @@ in
                         }
                       ''
                     else ""
-                ) ifaceConfig.devices);
+                  )
+                  ifaceConfig.devices);
             in
             lib.concatStringsSep "\n" (lib.mapAttrsToList generateRecordsForInterface config.pepe.core.network.interfaces);
         in

modules/core/network.nix

@@ -42,12 +42,6 @@ in
                   default = false;
                   description = "Whether this device serves as a DNS endpoint for this interface.";
                 };
-
-                dnsResolvableName = mkOption {
-                  type = types.nullOr types.str;
-                  default = null;
-                  description = "The fully qualified domain name that should resolve to this device's IP address. e.g., my-device.lan.example.com";
-                };
               };
             });
             default = { };