feat(workspace): code block with language picker and live highlighting

frontend/src/index.css

@@ -411,62 +411,106 @@ body {
     color: var(--text-main);
   }
 
-  /* Prism Syntax Highlighting Tokens */
+  /* Prism Syntax Highlighting Tokens (VS Code Dark+ / Light+ via Theme Variables) */
+  :root {
+    --code-keyword: #569cd6;
+    --code-string: #ce9178;
+    --code-number: #b5cea8;
+    --code-comment: #6a9955;
+    --code-property: #9cdcfe;
+    --code-function: #dcdcaa;
+    --code-type: #4ec9b0;
+    --code-punctuation: #d4d4d4;
+    --code-variable: #9cdcfe;
+  }
+
+  :root:not(.dark),
+  :root[data-theme="light"] {
+    --code-keyword: #0000ff;
+    --code-string: #a31515;
+    --code-number: #098658;
+    --code-comment: #008000;
+    --code-property: #0451a5;
+    --code-function: #795e26;
+    --code-type: #267f99;
+    --code-punctuation: #3b3b3b;
+    --code-variable: #001080;
+  }
+
   .token.comment,
   .token.prolog,
   .token.doctype,
   .token.cdata {
-    color: #71717a;
+    color: var(--code-comment);
     font-style: italic;
   }
 
-  .token.punctuation {
-    color: #94a3b8;
+  .token.punctuation,
+  .token.operator {
+    color: var(--code-punctuation);
   }
 
   .token.property,
-  .token.tag,
-  .token.boolean,
+  .token.key,
+  .token.attr-name {
+    color: var(--code-property);
+  }
+
+  .token.string,
+  .token.char,
+  .token.attr-value,
+  .token.scalar,
+  .token.inserted,
+  .language-css .token.string,
+  .style .token.string {
+    color: var(--code-string);
+  }
+
   .token.number,
   .token.constant,
   .token.symbol,
-  .token.deleted {
-    color: #f43f5e;
-  }
-
-  .token.selector,
-  .token.attr-name,
-  .token.string,
-  .token.char,
-  .token.builtin,
-  .token.inserted {
-    color: #10b981;
-  }
-
-  .token.operator,
-  .token.entity,
-  .token.url,
-  .language-css .token.string,
-  .style .token.string {
-    color: #38bdf8;
+  .token.datetime {
+    color: var(--code-number);
   }
 
+  .token.keyword,
+  .token.boolean,
+  .token.null,
   .token.atrule,
-  .token.attr-value,
-  .token.keyword {
-    color: #818cf8;
-    font-weight: 600;
+  .token.directive,
+  .token.tag,
+  .token.deleted {
+    color: var(--code-keyword);
+  }
+
+  .token.key.atrule {
+    color: var(--code-property);
   }
 
   .token.function,
-  .token.class-name {
-    color: #fbbf24;
+  .token.function-variable {
+    color: var(--code-function);
   }
 
+  .token.class-name,
+  .token.type,
+  .token.builtin,
+  .token.namespace {
+    color: var(--code-type);
+  }
+
+  .token.variable,
   .token.regex,
   .token.important,
-  .token.variable {
-    color: #f97316;
+  .token.selector,
+  .token.entity,
+  .token.url {
+    color: var(--code-variable);
+  }
+
+  .token.boolean.important,
+  .token.null.important {
+    color: var(--code-keyword);
   }
 }