docs(database): update configuration guides with wizard cross-references, clean up review feedback

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

frontend/templates/db_wizard.html

@@ -248,7 +248,7 @@
             </div>
 
             <div class="p-4 border rounded-lg bg-gray-50">
-              <label for="env_snippet" id="env_snippet_label" class="block text-sm font-medium text-gray-700 mb-2">
+              <label for="env_snippet" class="block text-sm font-medium text-gray-700 mb-2">
                 Copy this into your <code>.env</code> file:
               </label>
               <div class="flex items-center">