diff --git a/frontend/src/app/components/Onboarding/OnboardingPanel.tsx b/frontend/src/app/components/Onboarding/OnboardingPanel.tsx
index 3e299d7a..85386811 100644
--- a/frontend/src/app/components/Onboarding/OnboardingPanel.tsx
+++ b/frontend/src/app/components/Onboarding/OnboardingPanel.tsx
@@ -443,12 +443,11 @@ const StepCardBody: React.FC<StepCardProps> = ({
             : undefined,
         }}
       >
-        {step.videoSrc ? (
+        {step.videoSrc && !(typeof navigator !== 'undefined' && navigator.userAgent.includes('Windows')) ? (
           <Box
             component="video"
             src={step.videoSrc}
-            autoPlay={typeof navigator === 'undefined' || !navigator.userAgent.includes('Windows')}
-            preload={typeof navigator !== 'undefined' && navigator.userAgent.includes('Windows') ? 'none' : 'metadata'}
+            autoPlay
             muted
             loop
             playsInline
diff --git a/frontend/src/app/pages/AgentChat/ChatInput/view/EditorSurface.tsx b/frontend/src/app/pages/AgentChat/ChatInput/view/EditorSurface.tsx
index 03977d82..ef6ef622 100644
--- a/frontend/src/app/pages/AgentChat/ChatInput/view/EditorSurface.tsx
+++ b/frontend/src/app/pages/AgentChat/ChatInput/view/EditorSurface.tsx
@@ -18,6 +18,9 @@ interface Props {
   onPaste: (e: React.ClipboardEvent) => void;
 }
 
+// Windows-Electron: <div contentEditable> mounts hit a Chromium 144 TSF native crash on commit; the textarea ablation the handlers/draft already route for has to land here too or the renderer segfaults.
+const IS_WIN_ELECTRON = typeof navigator !== 'undefined' && navigator.userAgent.includes('Windows') && navigator.userAgent.includes('Electron');
+
 export const EditorSurface: React.FC<Props> = ({
   c, editorRef, disabled, hasContent, hasAttachments, autoRunMode, isRunning, queueLength,
   placeholderLabel, onInput, onClick, onKeyDown, onPaste,
@@ -32,32 +35,62 @@ export const EditorSurface: React.FC<Props> = ({
 
   return (
     <Box sx={{ px: 1.5, pt: hasAttachments ? 0.5 : 1.25, pb: 0.25, position: 'relative' }}>
-      <div
-        ref={editorRef}
-        data-onboarding="chat-input"
-        contentEditable={!disabled}
-        suppressContentEditableWarning
-        spellCheck={false}
-        onInput={onInput}
-        onClick={onClick}
-        onKeyDown={onKeyDown}
-        onPaste={onPaste}
-        style={{
-          width: '100%',
-          minHeight: '1.5em',
-          maxHeight: 220,
-          overflowY: 'auto',
-          background: 'transparent',
-          border: 'none',
-          outline: 'none',
-          color: c.text.primary,
-          fontSize: '0.95rem',
-          lineHeight: '1.55',
-          fontFamily: 'inherit',
-          wordBreak: 'break-word',
-          whiteSpace: 'pre-wrap',
-        }}
-      />
+      {IS_WIN_ELECTRON ? (
+        <textarea
+          ref={editorRef as unknown as RefObject<HTMLTextAreaElement>}
+          data-onboarding="chat-input"
+          disabled={disabled}
+          spellCheck={false}
+          onInput={onInput}
+          onClick={onClick}
+          onKeyDown={onKeyDown as unknown as React.KeyboardEventHandler<HTMLTextAreaElement>}
+          onPaste={onPaste as unknown as React.ClipboardEventHandler<HTMLTextAreaElement>}
+          rows={1}
+          style={{
+            width: '100%',
+            minHeight: '1.5em',
+            maxHeight: 220,
+            overflowY: 'auto',
+            background: 'transparent',
+            border: 'none',
+            outline: 'none',
+            color: c.text.primary,
+            fontSize: '0.95rem',
+            lineHeight: '1.55',
+            fontFamily: 'inherit',
+            wordBreak: 'break-word',
+            whiteSpace: 'pre-wrap',
+            resize: 'none',
+          }}
+        />
+      ) : (
+        <div
+          ref={editorRef}
+          data-onboarding="chat-input"
+          contentEditable={!disabled}
+          suppressContentEditableWarning
+          spellCheck={false}
+          onInput={onInput}
+          onClick={onClick}
+          onKeyDown={onKeyDown}
+          onPaste={onPaste}
+          style={{
+            width: '100%',
+            minHeight: '1.5em',
+            maxHeight: 220,
+            overflowY: 'auto',
+            background: 'transparent',
+            border: 'none',
+            outline: 'none',
+            color: c.text.primary,
+            fontSize: '0.95rem',
+            lineHeight: '1.55',
+            fontFamily: 'inherit',
+            wordBreak: 'break-word',
+            whiteSpace: 'pre-wrap',
+          }}
+        />
+      )}
       {!hasContent && (
         <div
           style={{