feat: add delete button to exports list and detail pages

Add DELETE /api/exports/{id} endpoint with cascade delete, trash icon
buttons on both the exports list and export detail pages, and disable
browser caching for static files to prevent stale JS issues.

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

FabWorks.Api/wwwroot/index.html

@@ -46,11 +46,11 @@
         <div class="page-content" id="page-content"></div>
     </div>
 
-    <script src="js/icons.js"></script>
-    <script src="js/helpers.js"></script>
-    <script src="js/components.js"></script>
-    <script src="js/pages.js"></script>
-    <script src="js/router.js"></script>
+    <script src="js/icons.js?v=2"></script>
+    <script src="js/helpers.js?v=2"></script>
+    <script src="js/components.js?v=2"></script>
+    <script src="js/pages.js?v=2"></script>
+    <script src="js/router.js?v=2"></script>
     <script>router.init();</script>
 </body>
 </html>