fix(modal): reposition tag autocomplete when suggestions load

Suggestions arrive after the modal opens, so the autocomplete dropdown
positioned itself downward before the suggestions section was visible
and stayed there — covering the chips until the input lost and regained
focus. Re-run positionAutocomplete() after renderSuggestions so it flips
above the input.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/static/js/view-modal.js

@@ -178,6 +178,14 @@ document.addEventListener('DOMContentLoaded', () => {
       suggestionsList.appendChild(group);
     }
     suggestionsSection.style.display = total > 0 ? '' : 'none';
+
+    // Suggestions load async after the modal opens, so the autocomplete dropdown
+    // may have already positioned itself downward (before the section was visible).
+    // Re-run positioning so it flips above the input now that suggestions occupy
+    // the space below.
+    if (tagAutocomplete && tagAutocomplete.classList.contains('active')) {
+      positionAutocomplete();
+    }
   }
 
   async function loadSuggestions(imageId) {