fix: address second round of CodeRabbit review feedback

- Audio regions now play at timeline rate (basePlaybackRate: 1), not clip speed
- Persist whisper executable/model paths to editor preferences on change
- Don't reset whisper model UI state when deletion fails
- Disable auto-captioning when captions are cleared
- Restore preview playback after GIF exports (was only restored for MP4)
- Don't auto-create full clip after loading a project with empty clip set
- Use source coordinates for thumbnail-derived speed regions

src/components/video-editor/hooks/useEditorAudioSync.ts

@@ -189,10 +189,6 @@ export function useEditorAudioSync({
 	useEffect(() => {
 		const currentTimeMs = currentTime * 1000;
 		const timelineMs = mapSourceTimeToTimelineTime(currentTimeMs);
-		const activeSpeedRegion = speedRegions.find(
-			(r) => currentTimeMs >= r.startMs && currentTimeMs < r.endMs,
-		);
-		const targetPlaybackRate = activeSpeedRegion ? activeSpeedRegion.speed : 1;
 
 		for (const region of audioRegions) {
 			const audio = audioElementsRef.current.get(region.id);
@@ -203,7 +199,7 @@ export function useEditorAudioSync({
 				if (Math.abs(audio.currentTime - audioOffset) > 0.2)
 					audio.currentTime = audioOffset;
 				const syncedRate = getMediaSyncPlaybackRate({
-					basePlaybackRate: targetPlaybackRate,
+					basePlaybackRate: 1,
 					currentTime: audio.currentTime,
 					targetTime: audioOffset,
 				});
@@ -214,7 +210,7 @@ export function useEditorAudioSync({
 				if (!audio.paused) audio.pause();
 			}
 		}
-	}, [isPlaying, currentTime, audioRegions, speedRegions, mapSourceTimeToTimelineTime]);
+	}, [isPlaying, currentTime, audioRegions, mapSourceTimeToTimelineTime]);
 
 	// Sync source-audio fallback elements with video playback
 	useEffect(() => {

src/components/video-editor/hooks/useEditorCaptions.ts

@@ -4,7 +4,7 @@
 import { useCallback, useEffect, useState } from "react";
 import { toast } from "sonner";
 import { resolveAutoCaptionSourcePath } from "../autoCaptionSource";
-import { loadEditorPreferences } from "../editorPreferences";
+import { loadEditorPreferences, saveEditorPreferences } from "../editorPreferences";
 import { resolveVideoUrl } from "../projectPersistence";
 import { type AutoCaptionSettings, type CaptionCue, DEFAULT_AUTO_CAPTION_SETTINGS } from "../types";
 
@@ -48,9 +48,12 @@ export function useEditorCaptions({
 
 	// Persist whisper paths to preferences
 	useEffect(() => {
-		// whisperExecutablePath and whisperModelPath are already persisted via
-		// useEditorPreferences effect if they were passed to it. Here we only need
-		// to persist after they change within this hook.
+		const current = loadEditorPreferences();
+		saveEditorPreferences({
+			...current,
+			whisperExecutablePath,
+			whisperModelPath,
+		});
 	}, [whisperExecutablePath, whisperModelPath]);
 
 	// Load whisper model status on mount
@@ -118,8 +121,6 @@ export function useEditorCaptions({
 		const result = await window.electronAPI.deleteWhisperSmallModel();
 		if (!result.success) {
 			toast.error(result.error || "Failed to delete Whisper small model");
-			setWhisperModelDownloadStatus("idle");
-			setWhisperModelDownloadProgress(0);
 			return;
 		}
 		setWhisperModelPath((cur) => (cur === downloadedWhisperModelPath ? null : cur));
@@ -202,6 +203,7 @@ export function useEditorCaptions({
 
 	const handleClearAutoCaptions = useCallback(() => {
 		setAutoCaptions([]);
+		setAutoCaptionSettings((prev) => ({ ...prev, enabled: false }));
 	}, []);
 
 	/** Reset captions from a freshly loaded project. */

src/components/video-editor/hooks/useEditorExport.ts

@@ -559,12 +559,12 @@ export function useEditorExport({
 							return;
 						}
 					}
+				}
 
-					if (wasPlaying) {
-						videoPlaybackRef.current?.play();
-					} else {
-						video.currentTime = restoreTime;
-					}
+				if (wasPlaying) {
+					videoPlaybackRef.current?.play();
+				} else {
+					video.currentTime = restoreTime;
 				}
 			} catch (error) {
 				console.error("Export error:", error);

src/components/video-editor/hooks/useEditorRegions.ts

@@ -633,7 +633,7 @@ export function useEditorRegions({
 		}) => {
 			setZoomRegions(editor.zoomRegions);
 			setClipRegions(editor.clipRegions);
-			clipInitializedRef.current = editor.clipRegions.length > 0;
+			clipInitializedRef.current = true;
 			setAnnotationRegions(editor.annotationRegions);
 			setAudioRegions(editor.audioRegions);
 			setSelectedZoomId(null);

src/components/video-editor/videoEditorUtils.ts

@@ -21,7 +21,7 @@ import type {
 	ZoomRegion,
 	ZoomTransitionEasing,
 } from "./types";
-import { getClipSourceEndMs } from "./types";
+import { getClipSourceEndMs, getClipSourceStartMs } from "./types";
 import type { VideoPlaybackRef } from "./VideoPlayback";
 
 export const DEFAULT_MP4_EXPORT_FRAME_RATE: ExportMp4FrameRate = 30;
@@ -248,7 +248,7 @@ export async function captureVideoThumbnail(config: ThumbnailRenderConfig): Prom
 		.filter((clip) => clip.speed !== 1)
 		.map((clip) => ({
 			id: `clip-speed-${clip.id}`,
-			startMs: clip.startMs,
+			startMs: getClipSourceStartMs(clip),
 			endMs: getClipSourceEndMs(clip),
 			speed: clip.speed as SpeedRegion["speed"],
 		}));