feat: 法语词汇学习应用

- Vue 3 + TypeScript + Tailwind CSS
- 词汇学习和管理功能
- 支持生词本和复习

src/utils/srs.ts

@@ -0,0 +1,46 @@
+import type { StudyProgress, DifficultyRating } from '../types/vocabulary';
+
+export function calculateNextReview(
+  progress: StudyProgress,
+  rating: DifficultyRating
+): StudyProgress {
+  const newProgress = { ...progress };
+  
+  switch (rating) {
+    case 'again':
+      newProgress.interval = 1;
+      newProgress.repetitions = 0;
+      newProgress.easeFactor = Math.max(1.3, progress.easeFactor - 0.2);
+      break;
+    case 'hard':
+      newProgress.interval = Math.round(progress.interval * 1.2);
+      newProgress.repetitions += 1;
+      newProgress.easeFactor = Math.max(1.3, progress.easeFactor - 0.15);
+      break;
+    case 'good':
+      if (progress.repetitions === 0) {
+        newProgress.interval = 1;
+      } else if (progress.repetitions === 1) {
+        newProgress.interval = 6;
+      } else {
+        newProgress.interval = Math.round(progress.interval * progress.easeFactor);
+      }
+      newProgress.repetitions += 1;
+      break;
+    case 'easy':
+      if (progress.repetitions === 0) {
+        newProgress.interval = 4;
+      } else {
+        newProgress.interval = Math.round(progress.interval * progress.easeFactor * 1.3);
+      }
+      newProgress.repetitions += 1;
+      newProgress.easeFactor += 0.15;
+      break;
+  }
+  
+  const now = new Date();
+  newProgress.nextReviewDate = new Date(now.getTime() + newProgress.interval * 24 * 60 * 60 * 1000);
+  newProgress.lastStudiedDate = now;
+  
+  return newProgress;
+}