Rename matrix-synapse module to matrix

modules/services/matrix/default.nix

@@ -6,17 +6,14 @@
 }:
 
 let
-  cfg = config.modules.services.matrix-synapse;
+  cfg = config.modules.services.matrix;
   validBridges = [
     "signal"
     "whatsapp"
   ];
 in {
-  options.modules.services.matrix-synapse = {
-    enable = lib.mkOption {
-      default = false;
-      example = true;
-    };
+  options.modules.services.matrix = {
+    enable = lib.mkEnableOption "matrix";
     enableElementWeb = lib.mkOption {
       default = true;
       example = false;
@@ -219,5 +216,11 @@ in {
         };
       } // commonBridgeSettings "mautrix-whatsapp";
     };
+
+    services.matrix-sliding-sync = lib.mkIf cfg.slidingSync.enable {
+      enable = true;
+      environmentFile = null;
+      settings = { SYNCV3_SERVER = "https://${cfg.serverName}"; };
+    };
   };
 }