feat: claim unowned work from Filed (Closes #893)

frontend/index.html

@@ -698,6 +698,10 @@
         <div id="issue-handoff-status" class="small" aria-live="assertive">Load teammates to transfer ownership.</div>
       </div>
     </details>
+    <section class="filed-claim-actions" id="filed-claim-actions" aria-label="Take ownership of filed issue" hidden>
+      <button id="queue-filed-issue" type="button">Queue Today</button>
+      <button id="start-filed-issue" type="button">Claim &amp; start</button>
+    </section>
     <div class="issue-sheet-actions">
       <button class="share-work-route" type="button">Share</button>
       <button id="release-issue" type="button">Release assignment</button>
@@ -1307,6 +1311,7 @@
 <script src="static/create-issue-sheet.js"></script>
 <script src="static/create-and-start.js"></script>
 <script src="static/assign-and-start.js"></script>
+<script src="static/filed-claim.js"></script>
 <script src="static/queue-today.js"></script>
 <script src="static/pull-sheet.js"></script>
 <script src="static/review-sheet.js"></script>