feat: find work within active queues (Closes #667)

frontend/index.html

@@ -169,6 +169,15 @@
       <button id="cancel-update-selection" type="button" hidden>Cancel selection</button>
       <span class="small" id="update-selection-status" role="status" aria-live="polite"></span>
     </div>
+    <form class="queue-finder" id="queue-finder" role="search">
+      <label for="queue-find-input">Find in <span id="queue-find-label">All</span></label>
+      <div class="queue-finder-row">
+        <input id="queue-find-input" type="search" autocomplete="off" aria-label="Find in active work queue" placeholder="Repository, #number, or title" />
+        <button id="clear-queue-find" type="button" hidden>Clear</button>
+      </div>
+      <div class="small" id="queue-find-status" role="status" aria-live="polite"></div>
+      <button id="search-older-work" type="button" hidden>Search older work</button>
+    </form>
     <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>