fix(web): address Copilot review on ToolCall labels and copy button

Widen the tool-call section label column for text-xs + text-display, and
restore normal-case on the terminal copy button so it stays sentence case.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/components/ToolCall.tsx

@@ -186,7 +186,7 @@ function Section({
   return (
     <div className="flex gap-3">
       <span
-        className={`text-display tracking-wider text-xs shrink-0 w-14 pt-0.5 ${
+        className={`text-display tracking-wider text-xs shrink-0 w-20 pt-0.5 ${
           tone === "error" ? "text-destructive" : "text-text-tertiary"
         }`}
       >

web/src/pages/ChatPage.tsx

@@ -820,6 +820,7 @@ export default function ChatPage({ isActive = true }: { isActive?: boolean }) {
             aria-label="Copy last assistant response"
             className={cn(
               "absolute z-10",
+              "normal-case tracking-normal font-normal",
               "rounded border border-current/30",
               "bg-black/20 backdrop-blur-sm",
               "opacity-70 hover:opacity-100 hover:border-current/60",