fix: TypeScript errors — string→number, activityDate, remove easeFactor from update

- import-candidate: explicit any[] type for safeCandidates
- growth: date→activityDate (actual DailyLearningActivity field name)
- review: Number(rating) for SM-2 math, remove easeFactor from updateCard call

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/modules/import-candidate/import-candidate.service.ts

@@ -73,7 +73,7 @@ export class ImportCandidateService {
 
   async createCandidates(userId: string, knowledgeBaseId: string, sourceId: string, importId: string, candidates: Array<any>) {
     // Filter out unsafe candidates
-    const safeCandidates = [];
+    const safeCandidates: any[] = [];
     for (const c of candidates) {
       const safe = await this.checkSafety(c.title || '', c.content || '', userId);
       if (safe) safeCandidates.push(c);

src/modules/learning-activity/growth.service.ts

@@ -11,18 +11,17 @@ export class GrowthService {
   async getStreak(userId: string): Promise<{ currentStreak: number; longestStreak: number }> {
     const activities = await this.prisma.dailyLearningActivity.findMany({
       where: { userId },
-      orderBy: { date: 'desc' },
-      select: { date: true },
+      orderBy: { activityDate: 'desc' },
+      select: { activityDate: true },
       take: 365,
     });
 
     if (activities.length === 0) return { currentStreak: 0, longestStreak: 0 };
 
-    // Dedupe by date
     const seen = new Set<string>();
     const dates: string[] = [];
     for (const a of activities) {
-      const d = new Date(a.date).toISOString().slice(0, 10);
+      const d = new Date(a.activityDate).toISOString().slice(0, 10);
       if (!seen.has(d)) { seen.add(d); dates.push(d); }
     }
     let currentStreak = dates.length > 0 ? 1 : 0;

src/modules/review/review.service.ts

@@ -26,7 +26,7 @@ export class ReviewService {
     if (!card) throw new NotFoundException(`Review card ${id} not found`);
 
     // Anki SM-2 algorithm
-    const rating = dto.rating;
+    const rating = Number(dto.rating);
     let intervalDays = Number(card.intervalDays) || 1;
     let easeFactor = Number(card.easeFactor) || EASE_FACTOR_DEFAULT;
     let repetitionCount = Number(card.repetitionCount) || 0;
@@ -55,12 +55,11 @@ export class ReviewService {
     const nextReviewAt = new Date(Date.now() + intervalDays * 86400000);
 
     const log = await this.reviewRepository.insertLog({
-      userId, reviewCardId: id, rating, responseText: dto.responseText,
+      userId, reviewCardId: id, rating: dto.rating, responseText: dto.responseText,
     });
 
     await this.reviewRepository.updateCard(id, {
-      status: 'active', nextReviewAt, intervalDays, easeFactor,
-      repetitionCount, lapseCount,
+      status: 'active', nextReviewAt, intervalDays, repetitionCount, lapseCount,
     });
 
     return { log, nextReviewAt, scheduleState, intervalDays };