feat: editor updates

modules/capabilities/helix.nix

@@ -1,13 +1,64 @@
 { ... }:
 {
-  flake.modules.homeManager.helix = { pkgs, ... }: {
+  flake.modules.homeManager.helix =
+    { pkgs, ... }:
+    let
+      svelteLanguageServer = pkgs.svelte-language-server.overrideAttrs (
+        finalAttrs: _: {
+          version = "0.18.3";
+
+          src = pkgs.fetchFromGitHub {
+            owner = "sveltejs";
+            repo = "language-tools";
+            tag = "svelte-language-server@${finalAttrs.version}";
+            hash = "sha256-FTOkJPXbsG6R53yr4n0/IR2lzFCovrdV0+epOi07lBQ=";
+          };
+
+          pnpmDeps = pkgs.fetchPnpmDeps {
+            inherit (finalAttrs)
+              pname
+              version
+              src
+              pnpmWorkspaces
+              ;
+            pnpm = pkgs.pnpm_10;
+            fetcherVersion = 3;
+            hash = "sha256-fY3hrCkr/soJk1gp39/jec8lT2ZJI27xRBCZi006oWA=";
+          };
+        }
+      );
+    in
+    {
       programs.helix = {
         enable = true;
-      extraPackages = [ pkgs.svelte-language-server ];
+        extraPackages = with pkgs; [
+          svelteLanguageServer
+          nixd
+          nixfmt
+          oxfmt
+        ];
+
+        languages = {
+          language = [
+            {
+              name = "svelte";
+              formatter = {
+                command = "oxfmt";
+                args = [ "--stdin-filepath=%{buffer_name}" ];
+              };
+              auto-format = true;
+            }
+            {
+              name = "nix";
+              auto-format = true;
+            }
+          ];
+        };
 
         settings = {
           theme = "kanagawa";
-        editor.cursor-shape = {
+          editor = {
+            cursor-shape = {
               insert = "bar";
               normal = "block";
               select = "underline";
@@ -15,4 +66,5 @@
           };
         };
       };
+    };
 }

modules/capabilities/neovim/default.nix

@@ -20,6 +20,30 @@ in
     }:
     let
       nvimTreesitter = pkgs.vimPlugins.nvim-treesitter;
+      svelteLanguageServer = pkgs.svelte-language-server.overrideAttrs (
+        finalAttrs: _: {
+          version = "0.18.3";
+
+          src = pkgs.fetchFromGitHub {
+            owner = "sveltejs";
+            repo = "language-tools";
+            tag = "svelte-language-server@${finalAttrs.version}";
+            hash = "sha256-FTOkJPXbsG6R53yr4n0/IR2lzFCovrdV0+epOi07lBQ=";
+          };
+
+          pnpmDeps = pkgs.fetchPnpmDeps {
+            inherit (finalAttrs)
+              pname
+              version
+              src
+              pnpmWorkspaces
+              ;
+            pnpm = pkgs.pnpm_10;
+            fetcherVersion = 3;
+            hash = "sha256-fY3hrCkr/soJk1gp39/jec8lT2ZJI27xRBCZi006oWA=";
+          };
+        }
+      );
       svelteGrammar = nvimTreesitter.builtGrammars.svelte.overrideAttrs (_: {
         version = "0.0.0+rev=c2457b9";
         src = pkgs.fetchFromGitHub {
@@ -80,7 +104,7 @@ in
           oxlint
           oxfmt
           emmet-language-server
-          svelte-language-server
+          svelteLanguageServer
         ];
 
         specs = {