Fix fireRegen: clear+set pattern for Gradio 5 React .change()

app.py

@@ -1531,14 +1531,32 @@ _GLOBAL_JS = """
   function fireRegen(slot_id, idx) {
     const hidden_id = 'regen_trigger_' + slot_id;
     const el = document.getElementById(hidden_id);
-    if (!el) return;
+    if (!el) { console.warn('[fireRegen] element not found:', hidden_id); return; }
     const input = el.querySelector('input, textarea');
-    if (!input) return;
-    const desc = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, 'value')
-              || Object.getOwnPropertyDescriptor(HTMLTextAreaElement.prototype, 'value');
-    if (desc && desc.set) desc.set.call(input, slot_id + '|' + idx);
-    else input.value = slot_id + '|' + idx;
-    input.dispatchEvent(new Event('input', {bubbles: true}));
+    if (!input) { console.warn('[fireRegen] no input inside', hidden_id); return; }
+
+    // Gradio 5 / React: must use the native setter to bypass React's controlled-
+    // input tracking, otherwise dispatchEvent is swallowed. Also must clear first
+    // so a repeat regen of the same segment triggers a value *change*.
+    const nativeInputDesc = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, 'value')
+                         || Object.getOwnPropertyDescriptor(HTMLTextAreaElement.prototype, 'value');
+    function setAndFire(val) {
+      if (nativeInputDesc && nativeInputDesc.set) {
+        nativeInputDesc.set.call(input, val);
+      } else {
+        input.value = val;
+      }
+      input.dispatchEvent(new Event('input',  {bubbles: true}));
+      input.dispatchEvent(new Event('change', {bubbles: true}));
+    }
+
+    // Clear first so even a repeated click on the same segment fires a change
+    setAndFire('');
+    setTimeout(function() {
+      setAndFire(slot_id + '|' + idx);
+      console.log('[fireRegen] fired', slot_id + '|' + idx);
+    }, 50);
+
     // Update status label
     const lbl = document.getElementById('wf_seglabel_' + slot_id);
     if (lbl) lbl.textContent = 'Regenerating Seg ' + (idx + 1) + '...';