feat: replace all hardcoded orange rgba with blue rgba

Mechanical find-and-replace: rgba(249,115,22,...) → rgba(96,165,250,...)
across ~40 component and page files.

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

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

@@ -56,7 +56,7 @@ export function ScriptBuilderInput({
         className={cn(
           "flex-1 resize-none rounded-xl px-4 py-2.5 text-sm",
           "bg-card border border-border text-foreground placeholder:text-muted-foreground",
-          "focus:outline-none focus:border-[rgba(249,115,22,0.3)] transition-colors",
+          "focus:outline-none focus:border-[rgba(96,165,250,0.3)] transition-colors",
           "disabled:opacity-50"
         )}
         style={{ maxHeight: 120 }}