Simplify comment and raw block patterns to single regex

Remove alias() calls that referenced undefined rules, which
prevented proper node type generation. Use simple regex patterns
instead.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

grammar.js

@@ -568,32 +568,17 @@ module.exports = grammar({
     comment: ($) => choice($.template_comment, $.html_comment),
 
     // Template comments: @* ... *@
-    template_comment: ($) =>
+    template_comment: ($) => /@\*([^*]|\*[^@])*\*@/,
-      seq(
-        alias("@*", $.comment_start),
-        optional($.comment_content),
-        alias("*@", $.comment_end)
-      ),
-    comment_content: ($) => /([^*]|\*[^@])*/,
 
     // HTML comment: <!-- ... -->
-    html_comment: ($) => seq("<!--", optional($.html_comment_content), "-->"),
+    html_comment: ($) => /<!--([^-]|-[^-]|--[^>])*-->/,
-
-    html_comment_content: ($) => /([^-]|-[^-]|--[^>])*/,
 
     // Raw blocks: @# ... #@
-    raw_block: ($) =>
+    raw_block: ($) => /@#([^#]|#[^@])*#@/,
-      seq(
-        alias("@#", $.raw_start),
-        optional($.raw_content),
-        alias("#@", $.raw_end)
-      ),
-    raw_content: ($) => /([^#]|#[^@])*/,
 
     // Embedded language blocks: @```lang ... ```@
     embedded_language: ($) =>
-      seq("@```", $.language_name, optional($.embedded_content), "```@"),
+      seq("@```", $.language_name, /([^`]|`[^`]|``[^`]|```[^@])*/, "```@"),
-    embedded_content: ($) => /([^`]|`[^`]|``[^`]|```[^@])*/,
 
     language_name: ($) =>
       choice("html", "css", "js", "javascript", "json", "alpine", "style"),