Fix stop generation button

internal/service/static/main.js

@@ -1031,6 +1031,14 @@ class Odidere {
       this.isStopPending = false;
       this.$send.classList.remove('pending');
     }
+    // While loading, the send button acts as the stop control and must stay
+    // clickable regardless of the normal enable/disable logic. When loading
+    // ends, restore the standard state.
+    if (loading) {
+      this.$send.disabled = false;
+    } else {
+      this.updateSendButtonState();
+    }
     if (loading) {
       this.wakeLock.acquire();
     } else {