feat: add mobile Following queue for watched issues (Closes #1293)

frontend/index.html

@@ -2016,6 +2016,7 @@
       <button data-mobile-queue="delivery" type="button"><span><strong>Delivery</strong><small>Needs recovery</small></span><span data-mobile-queue-count="delivery">0</span></button>
       <button data-mobile-queue="attention" type="button"><span><strong>Attention</strong><small>Needs a response</small></span><span data-mobile-queue-count="attention">0</span></button>
       <button data-mobile-queue="update" type="button" aria-label="Updates, 0 unread conversations"><span><strong>Updates</strong><small>Unread conversations</small></span><span data-mobile-queue-count="update">0</span></button>
+      <button data-mobile-queue="following" type="button" aria-label="Following, 0 watched issues"><span><strong>Following</strong><small>Issues you watch</small></span><span data-mobile-queue-count="following">0</span></button>
       <button data-mobile-queue="filed" type="button"><span><strong>Filed</strong><small>Issues you delegated</small></span><span data-mobile-queue-count="filed">0</span></button>
       <button data-mobile-queue="later" type="button"><span><strong>Later</strong><small>Deferred work</small></span><span data-mobile-queue-count="later">0</span></button>
       <button data-mobile-queue="draft" type="button"><span><strong>Drafts</strong><small>Unfiled captures</small></span><span data-mobile-queue-count="draft">0</span></button>
@@ -2025,6 +2026,15 @@
   </section>
 </dialog>
 
+<dialog class="following-sheet" id="following-sheet" aria-labelledby="following-title">
+  <section class="following-panel">
+    <header><div><p class="small muted">Read without taking ownership</p><h2 id="following-title">Following</h2></div><button id="close-following" type="button">Close</button></header>
+    <p id="following-status" class="small" role="status" aria-live="polite"></p>
+    <div id="following-list" class="following-list"></div>
+    <button id="retry-following" type="button" hidden>Retry</button>
+  </section>
+</dialog>
+
 <dialog id="mobile-delivery-recovery" class="mobile-delivery-recovery" aria-labelledby="mobile-delivery-recovery-title">
   <section class="mobile-delivery-recovery-panel">
     <header>
@@ -2076,6 +2086,7 @@
 <script src="static/commands.js"></script>
 <script src="static/saved-searches.js"></script>
 <script src="static/search-preview.js"></script>
+<script src="static/following.js"></script>
 <script src="static/search-reply-draft-store.js"></script>
 <script src="static/conversation-reply-draft-store.js"></script>
 <script src="static/conversation-photo-drafts.js"></script>