diff --git a/chap4_proj/chapter_04_santuary.aive b/chap4_proj/chapter_04_santuary.aive
index 4fddda5..519365e 100644
--- a/chap4_proj/chapter_04_santuary.aive
+++ b/chap4_proj/chapter_04_santuary.aive
@@ -44497,23 +44497,33 @@
   "cutRanges": [
     {
       "id": "cut_1",
-      "start": 554.9,
+      "start": 553.4962968404622,
+      "end": 561.6
+    },
+    {
+      "id": "cut_1",
+      "start": 553.4962968404622,
       "end": 561.6
     }
   ],
   "muteRanges": [
     {
       "id": "mute_2",
-      "start": 563.72,
+      "start": 563.1481209350031,
       "end": 571.5
     },
     {
       "id": "mute_3",
       "start": 34.98,
       "end": 50.14
+    },
+    {
+      "id": "mute_2",
+      "start": 563.1481209350031,
+      "end": 571.5
     }
   ],
   "language": "en",
-  "createdAt": "2026-04-03T17:11:13.537Z",
-  "modifiedAt": "2026-04-03T17:11:13.537Z"
+  "createdAt": "2026-04-03T17:38:19.689Z",
+  "modifiedAt": "2026-04-03T17:38:19.689Z"
 }
\ No newline at end of file
diff --git a/frontend/src/components/WaveformTimeline.tsx b/frontend/src/components/WaveformTimeline.tsx
index e90bf44..d32759d 100644
--- a/frontend/src/components/WaveformTimeline.tsx
+++ b/frontend/src/components/WaveformTimeline.tsx
@@ -695,6 +695,11 @@ export default function WaveformTimeline({ cutMode, muteMode }: { cutMode: boole
   // Handle keyboard shortcuts for zone editing
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
+      const target = e.target as HTMLElement | null;
+      if (target && (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA' || target.tagName === 'SELECT')) {
+        return;
+      }
+
       if (e.key === 'Escape') {
         setSelectedZone(null);
         setEditingZone(null);
@@ -702,6 +707,8 @@ export default function WaveformTimeline({ cutMode, muteMode }: { cutMode: boole
       } else if (e.key === 'Delete' || e.key === 'Backspace') {
         if (selectedZone) {
           e.preventDefault();
+          e.stopPropagation();
+          e.stopImmediatePropagation();
           if (selectedZone.type === 'cut') {
             removeCutRange(selectedZone.id);
           } else {
@@ -714,8 +721,9 @@ export default function WaveformTimeline({ cutMode, muteMode }: { cutMode: boole
       }
     };
 
-    window.addEventListener('keydown', handleKeyDown);
-    return () => window.removeEventListener('keydown', handleKeyDown);
+    // Capture phase ensures zone delete runs before app-level bubble shortcuts.
+    window.addEventListener('keydown', handleKeyDown, { capture: true });
+    return () => window.removeEventListener('keydown', handleKeyDown, { capture: true });
   }, [selectedZone, removeCutRange, removeMuteRange]);
 
   if (!videoUrl) {