Fix grammar to produce queryable nodes

Use seq() with named rules instead of inline regex patterns
to ensure raw_block, template_comment, etc. produce proper
named nodes that can be queried in highlights.scm

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

grammar.js

@@ -567,21 +567,33 @@ module.exports = grammar({
     // Comments
     comment: ($) => choice($.template_comment, $.html_comment),
 
-    // Template comments: @* ... *@ (simple form only for syntax highlighting)
+    // Template comments: @* ... *@
     template_comment: ($) =>
-      seq("@", /\*+/, optional(/([^*]|\*+[^@])*/), /\*+/, "@"),
+      seq(
+        alias("@*", $.comment_start),
+        optional($.comment_content),
+        alias("*@", $.comment_end)
+      ),
+    comment_content: ($) => /([^*]|\*[^@])*/,
+
     // HTML comment: <!-- ... -->
     html_comment: ($) => seq("<!--", optional($.html_comment_content), "-->"),
 
     html_comment_content: ($) => /([^-]|-[^-]|--[^>])*/,
 
-    // Raw blocks: @#...#@ (simple form only for syntax highlighting)
+    // Raw blocks: @# ... #@
     raw_block: ($) =>
-      seq("@", /#+/, optional(/([^#]|#+[^@])*/), /#+/, "@"),
+      seq(
+        alias("@#", $.raw_start),
+        optional($.raw_content),
+        alias("#@", $.raw_end)
+      ),
+    raw_content: ($) => /([^#]|#[^@])*/,
 
     // Embedded language blocks: @```lang ... ```@
     embedded_language: ($) =>
-      seq("@", /`+/, $.language_name, optional(/([^`]|`+[^@])*/), /`+/, "@"),
+      seq("@```", $.language_name, optional($.embedded_content), "```@"),
+    embedded_content: ($) => /([^`]|`[^`]|``[^`]|```[^@])*/,
 
     language_name: ($) =>
       choice("html", "css", "js", "javascript", "json", "alpine", "style"),