refac: speedRate -> playbackRate

src/lib/components/chat/Settings/Audio.svelte

@@ -24,7 +24,7 @@
 	let voice = '';
 
 	// Audio speed control
-	let speechRate = 1;
+	let playbackRate = 1;
 	const speedOptions = [2, 1.75, 1.5, 1.25, 1, 0.75, 0.5];
 
 	const getVoices = async () => {
@@ -60,7 +60,7 @@
 	};
 
 	onMount(async () => {
-		speechRate = $settings.audio?.tts?.speedRate ?? 1;
+		playbackRate = $settings.audio?.tts?.playbackRate ?? 1;
 		conversationMode = $settings.conversationMode ?? false;
 		speechAutoSend = $settings.speechAutoSend ?? false;
 		responseAutoPlayback = $settings.responseAutoPlayback ?? false;
@@ -88,7 +88,7 @@
 					engine: STTEngine !== '' ? STTEngine : undefined
 				},
 				tts: {
-					speedRate: speechRate,
+					playbackRate: playbackRate,
 					voice: voice !== '' ? voice : undefined,
 					defaultVoice: $config?.audio?.tts?.voice ?? '',
 					nonLocalVoices: $config.audio.tts.engine === '' ? nonLocalVoices : undefined
@@ -161,15 +161,15 @@
 			</div>
 
 			<div class=" py-0.5 flex w-full justify-between">
-				<div class=" self-center text-xs font-medium">{$i18n.t('Speed Rate')}</div>
+				<div class=" self-center text-xs font-medium">{$i18n.t('Speech Playback Speed')}</div>
 
 				<div class="flex items-center relative">
 					<select
 						class="dark:bg-gray-900 w-fit pr-8 rounded px-2 p-1 text-xs bg-transparent outline-none text-right"
-						bind:value={speechRate}
+						bind:value={playbackRate}
 					>
 						{#each speedOptions as option}
-							<option value={option} selected={speechRate === option}>{option}x</option>
+							<option value={option} selected={playbackRate === option}>{option}x</option>
 						{/each}
 					</select>
 				</div>