Pannello visione: integrazione overlay ed etichette quota (rows, drawOverlay, overlayLabels)

Refs #116

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/frontend/flask_app/templates/measure/task_execute.html

@@ -594,6 +594,11 @@
           <div class="relative" :style="'margin:auto;flex:none;' + zSize()">
             <img x-ref="img" :src="shownImage" @load="onImgLoad()" alt="" draggable="false" class="absolute inset-0 w-full h-full object-contain">
             <canvas x-ref="overlay" class="absolute inset-0 w-full h-full object-contain pointer-events-none"></canvas>
+            {# #116: etichette quota in HTML sopra il canvas (posizione in %, dimensione costante a ogni zoom); solo :style stringa #}
+            <template x-for="l in overlayLabels" :key="l.key">
+              <div class="absolute pointer-events-none whitespace-nowrap text-xs font-bold px-1.5 py-0.5 rounded shadow"
+                   :class="l.cls" :style="l.style" x-text="l.text"></div>
+            </template>
           </div>
         </div>
       </div>
@@ -1208,6 +1213,8 @@
     labels: { requestFailed: {{ _('Richiesta non riuscita')|tojson }} },
   };
 </script>
+{# #116: disegno overlay ed etichette quote; prima di vision_execute.js, che lo usa se presente #}
+<script src="{{ url_for('static', filename='js/vision_overlay.js') }}"></script>
 <script src="{{ url_for('static', filename='js/vision_execute.js') }}"></script>
 {# #53 #54 #55: result of check / note tasks (urls and words for the component) #}
 <script>