Soften chat composer focus border color (#188)

- Reduce focused composer border intensity using `focus-within:border-ring/45`
- Keeps drag-over styling behavior unchanged

Author: t3dotgg

apps/web/src/components/ChatView.tsx

@@ -3396,7 +3396,7 @@ export default function ChatView({ threadId }: ChatViewProps) {
           data-chat-composer-form="true"
         >
           <div
-            className={`group rounded-[20px] border bg-card transition-colors duration-200 focus-within:border-ring ${
+            className={`group rounded-[20px] border bg-card transition-colors duration-200 focus-within:border-ring/45 ${
               isDragOverComposer ? "border-primary/70 bg-accent/30" : "border-border"
             }`}
             onDragEnter={onComposerDragEnter}