fix InlineError blank space and ElicitationUrlPanel URL overflow

Only render InlineError details Stack when there is content to show.
Add wrapping Code theme variant for long URLs that would push buttons
offscreen.

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

clients/web/src/theme/Code.ts

@@ -1,9 +1,14 @@
 import { Code } from "@mantine/core";
 
 export const ThemeCode = Code.extend({
-  styles: () => ({
-    root: {
+  styles: (_theme, props) => {
+    const root: Record<string, string> = {
       backgroundColor: "var(--inspector-surface-code)",
-    },
-  }),
+    };
+    if (props.variant === "wrapping") {
+      root.wordBreak = "break-all";
+      root.whiteSpace = "pre-wrap";
+    }
+    return { root };
+  },
 });