feat: replace orange-* Tailwind classes with blue-* equivalents

orange-400→blue-400, orange-500→blue-500, orange-600→blue-600
across ~21 component files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/script-builder/ScriptCodeBlock.tsx

@@ -55,7 +55,7 @@ export function ScriptCodeBlock({
     <div className="mt-3 rounded-lg border bg-[rgba(0,0,0,0.3)] border-[rgba(255,255,255,0.06)] overflow-hidden">
       {/* Header */}
       <div className="flex items-center justify-between px-3 py-2 border-b border-[rgba(255,255,255,0.06)]">
-        <span className="font-mono text-xs text-orange-400 truncate">
+        <span className="font-mono text-xs text-blue-400 truncate">
           {filename || 'script'}
         </span>
         {lineCount != null && (