fix: preserve growth task label

templates/dashboard_v2.html

@@ -68,7 +68,7 @@
                 <div class="growth-task-list">
                     {% for task in growth.priority_tasks | default([]) %}
                         {% if task.action == 'backfill' %}
-                            <button class="growth-task is-{{ task.tone | default('neutral') }}" type="button" data-pchome-backfill-trigger data-limit="80">
+                            <button class="growth-task is-{{ task.tone | default('neutral') }}" type="button" data-pchome-backfill-trigger data-preserve-label="true" data-limit="80">
                                 <span class="momo-mono">{{ '%02d'|format(task.rank) }}</span>
                                 <strong>{{ task.title }}</strong>
                                 <em>{{ task.metric }}</em>

web/static/js/page-dashboard-v2.js

@@ -417,6 +417,9 @@ let priceChartInstance = null;
             const limit = Number(trigger.dataset.limit || 60);
             trigger.disabled = running;
             trigger.classList.toggle('is-loading', running);
+            if (trigger.dataset.preserveLabel === 'true') {
+                return;
+            }
             trigger.innerHTML = running
                 ? '<i class="fas fa-spinner fa-spin"></i> 執行中'
                 : `<i class="fas fa-search"></i> 補強 ${limit} 筆`;