feat: keep reviewed Filed history (Closes #882)

frontend/index.html

@@ -247,6 +247,10 @@
       </div>
       <button id="protect-today" type="button">Protect Today</button>
     </section>
+    <div class="filed-history-tabs" id="filed-history-tabs" role="group" aria-label="Filed outcome view" hidden>
+      <button type="button" data-filed-view="needs-review" aria-pressed="true">Needs review <span id="filed-needs-review-count">0</span></button>
+      <button type="button" data-filed-view="reviewed" aria-pressed="false">Reviewed <span id="filed-reviewed-count">0</span></button>
+    </div>
     <div class="my-work-list" id="my-work-list"></div>
     <div class="small" id="work-page-status" aria-live="polite"></div>
     <button class="load-more-work" id="load-more-work" type="button" hidden>Load older work</button>