loop/server: use pre tags for tool descriptions in debug page

Co-Authored-By: sketch <hello@sketch.dev>
Change-ID: sf5897ffabc6f6045k
diff --git a/loop/server/loophttp.go b/loop/server/loophttp.go
index 856932d..5abe750 100644
--- a/loop/server/loophttp.go
+++ b/loop/server/loophttp.go
@@ -1257,7 +1257,7 @@
 		h1 { color: #333; }
 		.tool { background: #f8f9fa; border: 1px solid #e9ecef; border-radius: 6px; padding: 20px; margin: 20px 0; }
 		.tool-name { font-size: 1.2em; font-weight: bold; color: #0366d6; margin-bottom: 8px; }
-		.tool-description { color: #586069; margin-bottom: 12px; }
+		.tool-description { color: #586069; margin-bottom: 12px; white-space: pre-wrap; font-family: 'SF Mono', Monaco, monospace; }
 		.tool-schema { background: #f6f8fa; border: 1px solid #d0d7de; border-radius: 4px; padding: 12px; font-family: 'SF Mono', Monaco, monospace; font-size: 12px; overflow-x: auto; }
 		.tool-meta { font-size: 0.9em; color: #656d76; margin-top: 8px; }
 		.summary { background: #e6f3ff; border-left: 4px solid #0366d6; padding: 16px; margin-bottom: 30px; }
@@ -1276,7 +1276,7 @@
 `, i+1, html.EscapeString(tool.Name))
 
 		if tool.Description != "" {
-			fmt.Fprintf(w, `		<div class="tool-description">%s</div>
+			fmt.Fprintf(w, `		<pre class="tool-description">%s</pre>
 `, html.EscapeString(tool.Description))
 		}