fix: 统一预计文案，TTS预计积分恢复±1积分范围

tauri-app/src/hooks/usePointsCheck.tsx

@@ -47,7 +47,7 @@ export function usePointsCheck() {
       await fetchBalance();
       const balance = usePointStore.getState().balance;
       if (balance < points) {
-        setModalDescription(`预估消耗 ${points} 积分，当前余额 ${balance} 积分`);
+        setModalDescription(`预计消耗 ${points} 积分，当前余额 ${balance} 积分`);
         setShowPointsModal(true);
         return false;
       }
@@ -67,7 +67,7 @@ export function usePointsCheck() {
     (error: unknown, _bizName: string, _requiredPoints?: number): boolean => {
       const msg = error instanceof Error ? error.message : String(error);
       if (msg.includes('402') || msg.includes('积分不足')) {
-        setModalDescription(`预估消耗 ${_requiredPoints || '?'} 积分`);
+        setModalDescription(`预计消耗 ${_requiredPoints || '?'} 积分`);
         setShowPointsModal(true);
         return true;
       }

tauri-app/src/pages/VideoCreation/VoiceSynthesis.tsx

@@ -79,7 +79,7 @@ export default function VoiceSynthesis() {
   // 加上镜头切换停顿（segment↔empty_shot: 0.5s，同类型: 0.3s），每 5 秒 1 积分，最低 1 积分
   const estimatedTtsPoints = useMemo(() => {
     const validSegments = segments.filter(s => s.voiceover?.trim());
-    if (validSegments.length === 0) return 0;
+    if (validSegments.length === 0) return { min: 0, max: 0 };
 
     // 纯朗读时间
     const totalChars = validSegments.reduce((sum, s) => sum + s.voiceover!.trim().length, 0);
@@ -98,7 +98,11 @@ export default function VoiceSynthesis() {
     }
 
     const totalSeconds = speechSeconds + pauseSeconds;
-    return Math.max(1, Math.ceil(totalSeconds / 5));
+    const base = Math.max(1, Math.ceil(totalSeconds / 5));
+    // 范围：±1 积分，覆盖取整误差和语速波动
+    const min = Math.max(1, base - 1);
+    const max = base + 1;
+    return { min, max };
   }, [segments, speed]);
 
   const handlePlayPause = useCallback((voiceId: string, url: string | null, e: React.MouseEvent) => {
@@ -299,7 +303,7 @@ export default function VoiceSynthesis() {
     if (!currentVoiceId) { toast.warning('请先选择音色'); setIsGenerating(false); return; }
 
     // 前置积分检查
-    const ok = await checkBalance(estimatedTtsPoints, '配音合成');
+    const ok = await checkBalance(estimatedTtsPoints.max, '配音合成');
     if (!ok) return;
 
     const progress = useProgressStore.getState();
@@ -353,9 +357,9 @@ export default function VoiceSynthesis() {
       // 生成完成后自动执行打轴+截取
       await handleAlignAndClip(qiniuUrl, meta.filePath);
 
-      progress.success('配音合成完成', result.consumedPoints || estimatedTtsPoints);
+      progress.success('配音合成完成', result.consumedPoints);
     } catch (err) {
-      if (handleError(err, '配音合成', estimatedTtsPoints)) {
+      if (handleError(err, '配音合成', estimatedTtsPoints.max)) {
         progress.hide();
         return;
       }
@@ -526,12 +530,12 @@ export default function VoiceSynthesis() {
           <div className="voice-generate-wrap">
             {!hasGeneratedAudio ? (
               <button className="btn btn-primary generate-btn" onClick={handleGenerate} disabled={isGenerating || !mergedText.trim()}>
-                {isGenerating ? '合成中...' : `合成配音（预计消耗 ${estimatedTtsPoints} 积分）`}
+                {isGenerating ? '合成中...' : `合成配音（预计消耗 ${estimatedTtsPoints.min}~${estimatedTtsPoints.max} 积分）`}
               </button>
             ) : (
               <div className="voice-generate-btns">
                 <button className="btn btn-secondary generate-btn" onClick={handleGenerate} disabled={isGenerating || !mergedText.trim()}>
-                  {isGenerating ? '合成中...' : `重新生成（预计消耗 ${estimatedTtsPoints} 积分）`}
+                  {isGenerating ? '合成中...' : `重新生成（预计消耗 ${estimatedTtsPoints.min}~${estimatedTtsPoints.max} 积分）`}
                 </button>
                 <button
                   className="btn btn-primary generate-btn"