feat(flashcards): révision SM-2, génération IA et page /revision

Livre US-FLASHCARDS avec decks, session de révision, stats et migration Prisma. Finalise le Web Clipper (i18n 15 langues) et corrige les erreurs ESLint bloquant la CI.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/lib/flashcards/deck-queries.ts

@@ -0,0 +1,90 @@
+import prisma from '@/lib/prisma'
+import { isCardMastered } from '@/lib/flashcards/sm2'
+
+export interface DeckSummary {
+  id: string
+  name: string
+  notebookId: string | null
+  totalCards: number
+  dueCount: number
+  masteredCount: number
+  lastReviewedAt: string | null
+  createdAt: string
+}
+
+export async function listDeckSummaries(userId: string): Promise<DeckSummary[]> {
+  const now = new Date()
+  const decks = await prisma.flashcardDeck.findMany({
+    where: { userId },
+    include: {
+      flashcards: {
+        select: {
+          id: true,
+          interval: true,
+          nextReviewAt: true,
+          reviews: {
+            orderBy: { reviewedAt: 'desc' },
+            take: 1,
+            select: { reviewedAt: true },
+          },
+        },
+      },
+    },
+    orderBy: { updatedAt: 'desc' },
+  })
+
+  return decks.map((deck) => {
+    const totalCards = deck.flashcards.length
+    const dueCount = deck.flashcards.filter((c) => c.nextReviewAt <= now).length
+    const masteredCount = deck.flashcards.filter((c) => isCardMastered(c.interval)).length
+    const lastReview = deck.flashcards
+      .flatMap((c) => c.reviews.map((r) => r.reviewedAt))
+      .sort((a, b) => b.getTime() - a.getTime())[0]
+
+    return {
+      id: deck.id,
+      name: deck.name,
+      notebookId: deck.notebookId,
+      totalCards,
+      dueCount,
+      masteredCount,
+      lastReviewedAt: lastReview ? lastReview.toISOString() : null,
+      createdAt: deck.createdAt.toISOString(),
+    }
+  })
+}
+
+export async function getDeckDetail(userId: string, deckId: string) {
+  const deck = await prisma.flashcardDeck.findFirst({
+    where: { id: deckId, userId },
+    include: {
+      flashcards: {
+        orderBy: { nextReviewAt: 'asc' },
+        include: {
+          note: { select: { id: true, title: true } },
+        },
+      },
+    },
+  })
+  if (!deck) return null
+
+  const now = new Date()
+  return {
+    id: deck.id,
+    name: deck.name,
+    notebookId: deck.notebookId,
+    cards: deck.flashcards.map((c) => ({
+      id: c.id,
+      front: c.front,
+      back: c.back,
+      type: c.type,
+      interval: c.interval,
+      easinessFactor: c.easinessFactor,
+      nextReviewAt: c.nextReviewAt.toISOString(),
+      noteId: c.noteId,
+      noteTitle: c.note?.title ?? null,
+      due: c.nextReviewAt <= now,
+      mastered: isCardMastered(c.interval),
+    })),
+  }
+}