fix: make back-link text consistent with aria-labels across file views

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
Agent-Logs-Url: https://github.com/christianlouis/DocuElevate/sessions/12276514-bd3d-4e3e-84d9-5977d1f82b19

frontend/templates/file_view.html

@@ -160,7 +160,7 @@
 
   <!-- ── Back + header ── -->
   <a href="/files/{{ file.id }}" style="display:inline-flex;align-items:center;gap:0.4rem;color:#3b82f6;font-weight:600;text-decoration:none;margin-bottom:1.25rem;" aria-label="Back to File Summary">
-    <i class="fas fa-arrow-left" aria-hidden="true"></i> Back to File
+    <i class="fas fa-arrow-left" aria-hidden="true"></i> Back to File Summary
   </a>
 
   <div class="doc-header">