fix: unescape HTML entities in result titles

Wikipedia returns HTML entities like <span> which were being
double-escaped by Go templates. Now using html.UnescapeString and
template.HTML to render properly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/views/templates/result_item.html

@@ -1,7 +1,7 @@
 {{define "result_item"}}
 <article class="result">
   <div class="result_header">
-    <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.Title}}</a>
+    <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.SafeTitle}}</a>
   </div>
   <div class="result_url">
     <img class="result-favicon" src="https://www.google.com/s2/favicons?domain={{.URL | urlquery}}&sz=32" alt="" loading="lazy" onerror="this.style.display='none'">
@@ -9,7 +9,7 @@
     <span class="engine-badge">{{.Engine}}</span>
   </div>
   {{if .Content}}
-  <p class="result_content">{{.Content}}</p>
+  <p class="result_content">{{.SafeContent}}</p>
   {{end}}
 </article>
 {{end}}