feat: 学習カード数の上限を撤廃

REVIEW_CARDS_LIMIT（復習カード80枚制限）とnewCardsPerDay（1日の新規カード制限）
を削除し、期日が来たすべてのカードを制限なく返すように変更。

削除した主な要素:
- REVIEW_CARDS_LIMIT定数とカード取得時のlimitパラメータ
- newCardsPerDayフィールド（DB schema, 型定義, Zod schema, sync, CRDT）
- countDueNewCards, countDueReviewCards, findDueNewCardsForStudy,
  findDueReviewCardsForStudy（CardRepository）
- countTodayNewCardReviews（ReviewLogRepository）
- デッキルートからのReviewLogRepository依存

https://claude.ai/code/session_018hrEJ9vg3RPoeAPyEc17gS

19 files changed, 19 insertions, 377 deletions

diff --git a/src/server/db/schema.ts b/src/server/db/schema.ts
index 50caf85..55be210 100644
--- a/src/server/db/schema.ts
+++ b/src/server/db/schema.ts
@@ -101,7 +101,6 @@ export const decks = pgTable("decks", {
 		.references(() => users.id),
 	name: varchar("name", { length: 255 }).notNull(),
 	description: text("description"),
-	newCardsPerDay: integer("new_cards_per_day").notNull().default(20),
 	createdAt: timestamp("created_at", { withTimezone: true })
 		.notNull()
 		.defaultNow(),
diff --git a/src/server/repositories/card.test.ts b/src/server/repositories/card.test.ts
index 21e5485..b492fd7 100644
--- a/src/server/repositories/card.test.ts
+++ b/src/server/repositories/card.test.ts
@@ -112,12 +112,8 @@ function createMockCardRepo(): CardRepository {
 		softDeleteByNoteId: vi.fn(),
 		findDueCards: vi.fn(),
 		countDueCards: vi.fn(),
-		countDueNewCards: vi.fn(),
-		countDueReviewCards: vi.fn(),
 		findDueCardsWithNoteData: vi.fn(),
 		findDueCardsForStudy: vi.fn(),
-		findDueNewCardsForStudy: vi.fn(),
-		findDueReviewCardsForStudy: vi.fn(),
 		updateFSRSFields: vi.fn(),
 	};
 }
diff --git a/src/server/repositories/card.ts b/src/server/repositories/card.ts
index d382f4d..0f1ef79 100644
--- a/src/server/repositories/card.ts
+++ b/src/server/repositories/card.ts
@@ -1,4 +1,4 @@
-import { and, eq, isNull, lt, ne, sql } from "drizzle-orm";
+import { and, eq, isNull, lt, sql } from "drizzle-orm";
 import { getEndOfStudyDayBoundary } from "../../shared/date.js";
 import { db } from "../db/index.js";
 import {
@@ -185,11 +185,7 @@ export const cardRepository: CardRepository = {
 		return result.length > 0;
 	},
 
-	async findDueCards(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<Card[]> {
+	async findDueCards(deckId: string, now: Date): Promise<Card[]> {
 		const boundary = getEndOfStudyDayBoundary(now);
 		const result = await db
 			.select()
@@ -201,8 +197,7 @@ export const cardRepository: CardRepository = {
 					lt(cards.due, boundary),
 				),
 			)
-			.orderBy(cards.due)
-			.limit(limit);
+			.orderBy(cards.due);
 		return result;
 	},
 
@@ -221,44 +216,11 @@ export const cardRepository: CardRepository = {
 		return result[0]?.count ?? 0;
 	},
 
-	async countDueNewCards(deckId: string, now: Date): Promise<number> {
-		const boundary = getEndOfStudyDayBoundary(now);
-		const result = await db
-			.select({ count: sql<number>`count(*)::int` })
-			.from(cards)
-			.where(
-				and(
-					eq(cards.deckId, deckId),
-					isNull(cards.deletedAt),
-					lt(cards.due, boundary),
-					eq(cards.state, CardState.New),
-				),
-			);
-		return result[0]?.count ?? 0;
-	},
-
-	async countDueReviewCards(deckId: string, now: Date): Promise<number> {
-		const boundary = getEndOfStudyDayBoundary(now);
-		const result = await db
-			.select({ count: sql<number>`count(*)::int` })
-			.from(cards)
-			.where(
-				and(
-					eq(cards.deckId, deckId),
-					isNull(cards.deletedAt),
-					lt(cards.due, boundary),
-					ne(cards.state, CardState.New),
-				),
-			);
-		return result[0]?.count ?? 0;
-	},
-
 	async findDueCardsWithNoteData(
 		deckId: string,
 		now: Date,
-		limit: number,
 	): Promise<CardWithNoteData[]> {
-		const dueCards = await this.findDueCards(deckId, now, limit);
+		const dueCards = await this.findDueCards(deckId, now);
 
 		const cardsWithNoteData: CardWithNoteData[] = [];
 
@@ -292,56 +254,11 @@ export const cardRepository: CardRepository = {
 	async findDueCardsForStudy(
 		deckId: string,
 		now: Date,
-		limit: number,
 	): Promise<CardForStudy[]> {
-		const dueCards = await this.findDueCards(deckId, now, limit);
+		const dueCards = await this.findDueCards(deckId, now);
 		return enrichCardsForStudy(dueCards);
 	},
 
-	async findDueNewCardsForStudy(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<CardForStudy[]> {
-		const boundary = getEndOfStudyDayBoundary(now);
-		const result = await db
-			.select()
-			.from(cards)
-			.where(
-				and(
-					eq(cards.deckId, deckId),
-					isNull(cards.deletedAt),
-					lt(cards.due, boundary),
-					eq(cards.state, CardState.New),
-				),
-			)
-			.orderBy(cards.due)
-			.limit(limit);
-		return enrichCardsForStudy(result);
-	},
-
-	async findDueReviewCardsForStudy(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<CardForStudy[]> {
-		const boundary = getEndOfStudyDayBoundary(now);
-		const result = await db
-			.select()
-			.from(cards)
-			.where(
-				and(
-					eq(cards.deckId, deckId),
-					isNull(cards.deletedAt),
-					lt(cards.due, boundary),
-					ne(cards.state, CardState.New),
-				),
-			)
-			.orderBy(cards.due)
-			.limit(limit);
-		return enrichCardsForStudy(result);
-	},
-
 	async updateFSRSFields(
 		id: string,
 		deckId: string,
diff --git a/src/server/repositories/deck.test.ts b/src/server/repositories/deck.test.ts
index 945f844..ab6e2fc 100644
--- a/src/server/repositories/deck.test.ts
+++ b/src/server/repositories/deck.test.ts
@@ -7,7 +7,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: null,
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
@@ -35,7 +34,6 @@ describe("DeckRepository mock factory", () => {
 			expect(deck.userId).toBe("user-uuid-123");
 			expect(deck.name).toBe("Test Deck");
 			expect(deck.description).toBeNull();
-			expect(deck.newCardsPerDay).toBe(20);
 			expect(deck.deletedAt).toBeNull();
 			expect(deck.syncVersion).toBe(0);
 		});
@@ -45,13 +43,11 @@ describe("DeckRepository mock factory", () => {
 				id: "custom-id",
 				name: "Custom Deck",
 				description: "A description",
-				newCardsPerDay: 50,
 			});
 
 			expect(deck.id).toBe("custom-id");
 			expect(deck.name).toBe("Custom Deck");
 			expect(deck.description).toBe("A description");
-			expect(deck.newCardsPerDay).toBe(50);
 		});
 	});
 
@@ -130,7 +126,6 @@ describe("Deck interface contracts", () => {
 
 		expect(deck).toHaveProperty("name");
 		expect(deck).toHaveProperty("description");
-		expect(deck).toHaveProperty("newCardsPerDay");
 	});
 });
 
diff --git a/src/server/repositories/deck.ts b/src/server/repositories/deck.ts
index 647c5cb..97af5f7 100644
--- a/src/server/repositories/deck.ts
+++ b/src/server/repositories/deck.ts
@@ -31,7 +31,6 @@ export const deckRepository: DeckRepository = {
 		userId: string;
 		name: string;
 		description?: string | null;
-		newCardsPerDay?: number;
 	}): Promise<Deck> {
 		const [deck] = await db
 			.insert(decks)
@@ -39,7 +38,6 @@ export const deckRepository: DeckRepository = {
 				userId: data.userId,
 				name: data.name,
 				description: data.description ?? null,
-				newCardsPerDay: data.newCardsPerDay ?? 20,
 			})
 			.returning();
 		if (!deck) {
@@ -54,7 +52,6 @@ export const deckRepository: DeckRepository = {
 		data: {
 			name?: string;
 			description?: string | null;
-			newCardsPerDay?: number;
 		},
 	): Promise<Deck | undefined> {
 		const result = await db
diff --git a/src/server/repositories/review-log.ts b/src/server/repositories/review-log.ts
index 97488d2..c8950d6 100644
--- a/src/server/repositories/review-log.ts
+++ b/src/server/repositories/review-log.ts
@@ -1,7 +1,5 @@
-import { and, eq, gte, sql } from "drizzle-orm";
-import { getStartOfStudyDayBoundary } from "../../shared/date.js";
 import { db } from "../db/index.js";
-import { CardState, cards, reviewLogs } from "../db/schema.js";
+import { reviewLogs } from "../db/schema.js";
 import type { ReviewLog, ReviewLogRepository } from "./types.js";
 
 export const reviewLogRepository: ReviewLogRepository = {
@@ -31,21 +29,4 @@ export const reviewLogRepository: ReviewLogRepository = {
 		}
 		return reviewLog;
 	},
-
-	async countTodayNewCardReviews(deckId: string, now: Date): Promise<number> {
-		const startOfDay = getStartOfStudyDayBoundary(now);
-
-		const result = await db
-			.select({ count: sql<number>`count(distinct ${reviewLogs.cardId})::int` })
-			.from(reviewLogs)
-			.innerJoin(cards, eq(reviewLogs.cardId, cards.id))
-			.where(
-				and(
-					eq(cards.deckId, deckId),
-					eq(reviewLogs.state, CardState.New),
-					gte(reviewLogs.reviewedAt, startOfDay),
-				),
-			);
-		return result[0]?.count ?? 0;
-	},
 };
diff --git a/src/server/repositories/sync.test.ts b/src/server/repositories/sync.test.ts
index ce59cb5..8425839 100644
--- a/src/server/repositories/sync.test.ts
+++ b/src/server/repositories/sync.test.ts
@@ -16,7 +16,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: null,
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
diff --git a/src/server/repositories/sync.ts b/src/server/repositories/sync.ts
index ca4c208..e197d37 100644
--- a/src/server/repositories/sync.ts
+++ b/src/server/repositories/sync.ts
@@ -53,7 +53,6 @@ export interface SyncDeckData {
 	id: string;
 	name: string;
 	description: string | null;
-	newCardsPerDay: number;
 	createdAt: string;
 	updatedAt: string;
 	deletedAt: string | null;
@@ -224,7 +223,6 @@ export const syncRepository: SyncRepository = {
 						userId,
 						name: deckData.name,
 						description: deckData.description,
-						newCardsPerDay: deckData.newCardsPerDay,
 						createdAt: new Date(deckData.createdAt),
 						updatedAt: clientUpdatedAt,
 						deletedAt: deckData.deletedAt ? new Date(deckData.deletedAt) : null,
@@ -248,7 +246,6 @@ export const syncRepository: SyncRepository = {
 						.set({
 							name: deckData.name,
 							description: deckData.description,
-							newCardsPerDay: deckData.newCardsPerDay,
 							updatedAt: clientUpdatedAt,
 							deletedAt: deckData.deletedAt
 								? new Date(deckData.deletedAt)
diff --git a/src/server/repositories/types.ts b/src/server/repositories/types.ts
index 4042daf..71cb811 100644
--- a/src/server/repositories/types.ts
+++ b/src/server/repositories/types.ts
@@ -50,7 +50,6 @@ export interface Deck {
 	userId: string;
 	name: string;
 	description: string | null;
-	newCardsPerDay: number;
 	createdAt: Date;
 	updatedAt: Date;
 	deletedAt: Date | null;
@@ -64,7 +63,6 @@ export interface DeckRepository {
 		userId: string;
 		name: string;
 		description?: string | null;
-		newCardsPerDay?: number;
 	}): Promise<Deck>;
 	update(
 		id: string,
@@ -72,7 +70,6 @@ export interface DeckRepository {
 		data: {
 			name?: string;
 			description?: string | null;
-			newCardsPerDay?: number;
 		},
 	): Promise<Deck | undefined>;
 	softDelete(id: string, userId: string): Promise<boolean>;
@@ -146,30 +143,13 @@ export interface CardRepository {
 	): Promise<Card | undefined>;
 	softDelete(id: string, deckId: string): Promise<boolean>;
 	softDeleteByNoteId(noteId: string): Promise<boolean>;
-	findDueCards(deckId: string, now: Date, limit: number): Promise<Card[]>;
+	findDueCards(deckId: string, now: Date): Promise<Card[]>;
 	countDueCards(deckId: string, now: Date): Promise<number>;
 	findDueCardsWithNoteData(
 		deckId: string,
 		now: Date,
-		limit: number,
 	): Promise<CardWithNoteData[]>;
-	findDueCardsForStudy(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<CardForStudy[]>;
-	findDueNewCardsForStudy(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<CardForStudy[]>;
-	findDueReviewCardsForStudy(
-		deckId: string,
-		now: Date,
-		limit: number,
-	): Promise<CardForStudy[]>;
-	countDueNewCards(deckId: string, now: Date): Promise<number>;
-	countDueReviewCards(deckId: string, now: Date): Promise<number>;
+	findDueCardsForStudy(deckId: string, now: Date): Promise<CardForStudy[]>;
 	updateFSRSFields(
 		id: string,
 		deckId: string,
@@ -210,7 +190,6 @@ export interface ReviewLogRepository {
 		elapsedDays: number;
 		durationMs?: number | null;
 	}): Promise<ReviewLog>;
-	countTodayNewCardReviews(deckId: string, now: Date): Promise<number>;
 }
 
 export interface NoteType {
diff --git a/src/server/routes/cards.test.ts b/src/server/routes/cards.test.ts
index 4595e28..a063c95 100644
--- a/src/server/routes/cards.test.ts
+++ b/src/server/routes/cards.test.ts
@@ -26,12 +26,8 @@ function createMockCardRepo(): CardRepository {
 		softDeleteByNoteId: vi.fn(),
 		findDueCards: vi.fn(),
 		countDueCards: vi.fn(),
-		countDueNewCards: vi.fn(),
-		countDueReviewCards: vi.fn(),
 		findDueCardsWithNoteData: vi.fn(),
 		findDueCardsForStudy: vi.fn(),
-		findDueNewCardsForStudy: vi.fn(),
-		findDueReviewCardsForStudy: vi.fn(),
 		updateFSRSFields: vi.fn(),
 	};
 }
@@ -66,7 +62,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: "Test description",
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
diff --git a/src/server/routes/decks.test.ts b/src/server/routes/decks.test.ts
index d0854c1..f686024 100644
--- a/src/server/routes/decks.test.ts
+++ b/src/server/routes/decks.test.ts
@@ -6,7 +6,6 @@ import type {
 	CardRepository,
 	Deck,
 	DeckRepository,
-	ReviewLogRepository,
 } from "../repositories/index.js";
 import { createDecksRouter } from "./decks.js";
 
@@ -32,23 +31,12 @@ function createMockCardRepo(): CardRepository {
 		softDeleteByNoteId: vi.fn(),
 		findDueCards: vi.fn(),
 		countDueCards: vi.fn().mockResolvedValue(0),
-		countDueNewCards: vi.fn().mockResolvedValue(0),
-		countDueReviewCards: vi.fn().mockResolvedValue(0),
 		findDueCardsWithNoteData: vi.fn(),
 		findDueCardsForStudy: vi.fn(),
-		findDueNewCardsForStudy: vi.fn(),
-		findDueReviewCardsForStudy: vi.fn(),
 		updateFSRSFields: vi.fn(),
 	};
 }
 
-function createMockReviewLogRepo(): ReviewLogRepository {
-	return {
-		create: vi.fn(),
-		countTodayNewCardReviews: vi.fn().mockResolvedValue(0),
-	};
-}
-
 const JWT_SECRET = process.env.JWT_SECRET || "test-secret";
 
 async function createTestToken(userId: string): Promise<string> {
@@ -69,7 +57,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: "Test description",
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
@@ -92,18 +79,15 @@ describe("GET /api/decks", () => {
 	let app: Hono;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockDeckRepo = createMockDeckRepo();
 		mockCardRepo = createMockCardRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
 		const decksRouter = createDecksRouter({
 			deckRepo: mockDeckRepo,
 			cardRepo: mockCardRepo,
-			reviewLogRepo: mockReviewLogRepo,
 		});
 		app = new Hono();
 		app.onError(errorHandler);
@@ -155,18 +139,15 @@ describe("POST /api/decks", () => {
 	let app: Hono;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockDeckRepo = createMockDeckRepo();
 		mockCardRepo = createMockCardRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
 		const decksRouter = createDecksRouter({
 			deckRepo: mockDeckRepo,
 			cardRepo: mockCardRepo,
-			reviewLogRepo: mockReviewLogRepo,
 		});
 		app = new Hono();
 		app.onError(errorHandler);
@@ -194,7 +175,6 @@ describe("POST /api/decks", () => {
 			userId: "user-uuid-123",
 			name: "New Deck",
 			description: undefined,
-			newCardsPerDay: 20,
 		});
 	});
 
@@ -202,7 +182,6 @@ describe("POST /api/decks", () => {
 		const newDeck = createMockDeck({
 			name: "Full Deck",
 			description: "Full description",
-			newCardsPerDay: 30,
 		});
 		vi.mocked(mockDeckRepo.create).mockResolvedValue(newDeck);
 
@@ -215,7 +194,6 @@ describe("POST /api/decks", () => {
 			body: JSON.stringify({
 				name: "Full Deck",
 				description: "Full description",
-				newCardsPerDay: 30,
 			}),
 		});
 
@@ -226,7 +204,6 @@ describe("POST /api/decks", () => {
 			userId: "user-uuid-123",
 			name: "Full Deck",
 			description: "Full description",
-			newCardsPerDay: 30,
 		});
 	});
 
@@ -271,18 +248,15 @@ describe("GET /api/decks/:id", () => {
 	let app: Hono;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockDeckRepo = createMockDeckRepo();
 		mockCardRepo = createMockCardRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
 		const decksRouter = createDecksRouter({
 			deckRepo: mockDeckRepo,
 			cardRepo: mockCardRepo,
-			reviewLogRepo: mockReviewLogRepo,
 		});
 		app = new Hono();
 		app.onError(errorHandler);
@@ -344,18 +318,15 @@ describe("PUT /api/decks/:id", () => {
 	let app: Hono;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockDeckRepo = createMockDeckRepo();
 		mockCardRepo = createMockCardRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
 		const decksRouter = createDecksRouter({
 			deckRepo: mockDeckRepo,
 			cardRepo: mockCardRepo,
-			reviewLogRepo: mockReviewLogRepo,
 		});
 		app = new Hono();
 		app.onError(errorHandler);
@@ -405,27 +376,6 @@ describe("PUT /api/decks/:id", () => {
 		expect(body.deck?.description).toBe("New description");
 	});
 
-	it("updates newCardsPerDay", async () => {
-		const updatedDeck = createMockDeck({ newCardsPerDay: 50 });
-		vi.mocked(mockDeckRepo.update).mockResolvedValue(updatedDeck);
-
-		const res = await app.request(
-			"/api/decks/00000000-0000-0000-0000-000000000000",
-			{
-				method: "PUT",
-				headers: {
-					Authorization: `Bearer ${authToken}`,
-					"Content-Type": "application/json",
-				},
-				body: JSON.stringify({ newCardsPerDay: 50 }),
-			},
-		);
-
-		expect(res.status).toBe(200);
-		const body = (await res.json()) as DeckResponse;
-		expect(body.deck?.newCardsPerDay).toBe(50);
-	});
-
 	it("returns 404 for non-existent deck", async () => {
 		vi.mocked(mockDeckRepo.update).mockResolvedValue(undefined);
 
@@ -477,18 +427,15 @@ describe("DELETE /api/decks/:id", () => {
 	let app: Hono;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockDeckRepo = createMockDeckRepo();
 		mockCardRepo = createMockCardRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
 		const decksRouter = createDecksRouter({
 			deckRepo: mockDeckRepo,
 			cardRepo: mockCardRepo,
-			reviewLogRepo: mockReviewLogRepo,
 		});
 		app = new Hono();
 		app.onError(errorHandler);
diff --git a/src/server/routes/decks.ts b/src/server/routes/decks.ts
index d73aa0c..ed7077e 100644
--- a/src/server/routes/decks.ts
+++ b/src/server/routes/decks.ts
@@ -7,25 +7,20 @@ import {
 	cardRepository,
 	type DeckRepository,
 	deckRepository,
-	type ReviewLogRepository,
-	reviewLogRepository,
 } from "../repositories/index.js";
 import { createDeckSchema, updateDeckSchema } from "../schemas/index.js";
 
 export interface DeckDependencies {
 	deckRepo: DeckRepository;
 	cardRepo: CardRepository;
-	reviewLogRepo: ReviewLogRepository;
 }
 
 const deckIdParamSchema = z.object({
 	id: z.uuid(),
 });
 
-const REVIEW_CARDS_LIMIT = 80;
-
 export function createDecksRouter(deps: DeckDependencies) {
-	const { deckRepo, cardRepo, reviewLogRepo } = deps;
+	const { deckRepo, cardRepo } = deps;
 
 	return new Hono()
 		.use("*", authMiddleware)
@@ -35,26 +30,7 @@ export function createDecksRouter(deps: DeckDependencies) {
 			const now = new Date();
 			const decksWithDueCount = await Promise.all(
 				decks.map(async (deck) => {
-					const [dueNewCards, dueReviewCards, reviewedNewCards] =
-						await Promise.all([
-							cardRepo.countDueNewCards(deck.id, now),
-							cardRepo.countDueReviewCards(deck.id, now),
-							reviewLogRepo.countTodayNewCardReviews(deck.id, now),
-						]);
-
-					// Apply the same limits as the study screen
-					const newCardBudget = Math.max(
-						0,
-						deck.newCardsPerDay - reviewedNewCards,
-					);
-					const newCardsToStudy = Math.min(dueNewCards, newCardBudget);
-					const reviewCardsToStudy = Math.min(
-						dueReviewCards,
-						REVIEW_CARDS_LIMIT,
-					);
-
-					const dueCardCount = newCardsToStudy + reviewCardsToStudy;
-
+					const dueCardCount = await cardRepo.countDueCards(deck.id, now);
 					return { ...deck, dueCardCount };
 				}),
 			);
@@ -68,7 +44,6 @@ export function createDecksRouter(deps: DeckDependencies) {
 				userId: user.id,
 				name: data.name,
 				description: data.description,
-				newCardsPerDay: data.newCardsPerDay,
 			});
 
 			return c.json({ deck }, 201);
@@ -83,18 +58,7 @@ export function createDecksRouter(deps: DeckDependencies) {
 			}
 
 			const now = new Date();
-			const [dueNewCards, dueReviewCards, reviewedNewCards] = await Promise.all(
-				[
-					cardRepo.countDueNewCards(deck.id, now),
-					cardRepo.countDueReviewCards(deck.id, now),
-					reviewLogRepo.countTodayNewCardReviews(deck.id, now),
-				],
-			);
-
-			const newCardBudget = Math.max(0, deck.newCardsPerDay - reviewedNewCards);
-			const newCardsToStudy = Math.min(dueNewCards, newCardBudget);
-			const reviewCardsToStudy = Math.min(dueReviewCards, REVIEW_CARDS_LIMIT);
-			const dueCardCount = newCardsToStudy + reviewCardsToStudy;
+			const dueCardCount = await cardRepo.countDueCards(deck.id, now);
 
 			return c.json({ deck: { ...deck, dueCardCount } }, 200);
 		})
@@ -131,5 +95,4 @@ export function createDecksRouter(deps: DeckDependencies) {
 export const decks = createDecksRouter({
 	deckRepo: deckRepository,
 	cardRepo: cardRepository,
-	reviewLogRepo: reviewLogRepository,
 });
diff --git a/src/server/routes/notes.test.ts b/src/server/routes/notes.test.ts
index e354fa6..116a57f 100644
--- a/src/server/routes/notes.test.ts
+++ b/src/server/routes/notes.test.ts
@@ -57,7 +57,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: "Test description",
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
diff --git a/src/server/routes/study.test.ts b/src/server/routes/study.test.ts
index 514d966..119b25d 100644
--- a/src/server/routes/study.test.ts
+++ b/src/server/routes/study.test.ts
@@ -26,12 +26,8 @@ function createMockCardRepo(): CardRepository {
 		softDeleteByNoteId: vi.fn(),
 		findDueCards: vi.fn(),
 		countDueCards: vi.fn(),
-		countDueNewCards: vi.fn(),
-		countDueReviewCards: vi.fn(),
 		findDueCardsWithNoteData: vi.fn(),
 		findDueCardsForStudy: vi.fn(),
-		findDueNewCardsForStudy: vi.fn(),
-		findDueReviewCardsForStudy: vi.fn(),
 		updateFSRSFields: vi.fn(),
 	};
 }
@@ -49,7 +45,6 @@ function createMockDeckRepo(): DeckRepository {
 function createMockReviewLogRepo(): ReviewLogRepository {
 	return {
 		create: vi.fn(),
-		countTodayNewCardReviews: vi.fn().mockResolvedValue(0),
 	};
 }
 
@@ -73,7 +68,6 @@ function createMockDeck(overrides: Partial<Deck> = {}): Deck {
 		userId: "user-uuid-123",
 		name: "Test Deck",
 		description: "Test description",
-		newCardsPerDay: 20,
 		createdAt: new Date("2024-01-01"),
 		updatedAt: new Date("2024-01-01"),
 		deletedAt: null,
@@ -152,14 +146,13 @@ describe("GET /api/decks/:deckId/study", () => {
 	let app: Hono;
 	let mockCardRepo: ReturnType<typeof createMockCardRepo>;
 	let mockDeckRepo: ReturnType<typeof createMockDeckRepo>;
-	let mockReviewLogRepo: ReturnType<typeof createMockReviewLogRepo>;
 	let authToken: string;
 
 	beforeEach(async () => {
 		vi.clearAllMocks();
 		mockCardRepo = createMockCardRepo();
 		mockDeckRepo = createMockDeckRepo();
-		mockReviewLogRepo = createMockReviewLogRepo();
+		const mockReviewLogRepo = createMockReviewLogRepo();
 		const studyRouter = createStudyRouter({
 			cardRepo: mockCardRepo,
 			deckRepo: mockDeckRepo,
@@ -175,8 +168,7 @@ describe("GET /api/decks/:deckId/study", () => {
 		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
 			createMockDeck({ id: DECK_ID }),
 		);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue([]);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue([]);
+		vi.mocked(mockCardRepo.findDueCardsForStudy).mockResolvedValue([]);
 
 		const res = await app.request(`/api/decks/${DECK_ID}/study`, {
 			method: "GET",
@@ -190,20 +182,14 @@ describe("GET /api/decks/:deckId/study", () => {
 			DECK_ID,
 			"user-uuid-123",
 		);
-		expect(mockCardRepo.findDueNewCardsForStudy).toHaveBeenCalledWith(
-			DECK_ID,
-			expect.any(Date),
-			20,
-		);
-		expect(mockCardRepo.findDueReviewCardsForStudy).toHaveBeenCalledWith(
+		expect(mockCardRepo.findDueCardsForStudy).toHaveBeenCalledWith(
 			DECK_ID,
 			expect.any(Date),
-			80,
 		);
 	});
 
 	it("returns due cards", async () => {
-		const newCards = [
+		const mockCards = [
 			createMockCardForStudy({
 				id: "card-1",
 				front: "Q1",
@@ -211,8 +197,6 @@ describe("GET /api/decks/:deckId/study", () => {
 				state: CardState.New,
 				fieldValuesMap: {},
 			}),
-		];
-		const reviewCards = [
 			createMockCardForStudy({
 				id: "card-2",
 				front: "Q2",
@@ -224,10 +208,7 @@ describe("GET /api/decks/:deckId/study", () => {
 		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
 			createMockDeck({ id: DECK_ID }),
 		);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue(newCards);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue(
-			reviewCards,
-		);
+		vi.mocked(mockCardRepo.findDueCardsForStudy).mockResolvedValue(mockCards);
 
 		const res = await app.request(`/api/decks/${DECK_ID}/study`, {
 			method: "GET",
@@ -259,10 +240,7 @@ describe("GET /api/decks/:deckId/study", () => {
 		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
 			createMockDeck({ id: DECK_ID }),
 		);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue(
-			mockCards,
-		);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue([]);
+		vi.mocked(mockCardRepo.findDueCardsForStudy).mockResolvedValue(mockCards);
 
 		const res = await app.request(`/api/decks/${DECK_ID}/study`, {
 			method: "GET",
@@ -276,81 +254,6 @@ describe("GET /api/decks/:deckId/study", () => {
 		expect(body.cards?.[0]?.fieldValuesMap?.Front).toBe("Question");
 	});
 
-	it("limits new cards based on newCardsPerDay", async () => {
-		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
-			createMockDeck({ id: DECK_ID, newCardsPerDay: 5 }),
-		);
-		vi.mocked(mockReviewLogRepo.countTodayNewCardReviews).mockResolvedValue(3);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue([]);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue([]);
-
-		await app.request(`/api/decks/${DECK_ID}/study`, {
-			method: "GET",
-			headers: { Authorization: `Bearer ${authToken}` },
-		});
-
-		expect(mockCardRepo.findDueNewCardsForStudy).toHaveBeenCalledWith(
-			DECK_ID,
-			expect.any(Date),
-			2,
-		);
-	});
-
-	it("returns 0 new cards when daily limit is reached", async () => {
-		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
-			createMockDeck({ id: DECK_ID, newCardsPerDay: 5 }),
-		);
-		vi.mocked(mockReviewLogRepo.countTodayNewCardReviews).mockResolvedValue(5);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue([]);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue([]);
-
-		await app.request(`/api/decks/${DECK_ID}/study`, {
-			method: "GET",
-			headers: { Authorization: `Bearer ${authToken}` },
-		});
-
-		expect(mockCardRepo.findDueNewCardsForStudy).toHaveBeenCalledWith(
-			DECK_ID,
-			expect.any(Date),
-			0,
-		);
-	});
-
-	it("places new cards before review cards in response", async () => {
-		const newCards = [
-			createMockCardForStudy({
-				id: "new-1",
-				state: CardState.New,
-				fieldValuesMap: {},
-			}),
-		];
-		const reviewCards = [
-			createMockCardForStudy({
-				id: "review-1",
-				state: CardState.Review,
-				fieldValuesMap: {},
-			}),
-		];
-		vi.mocked(mockDeckRepo.findById).mockResolvedValue(
-			createMockDeck({ id: DECK_ID }),
-		);
-		vi.mocked(mockCardRepo.findDueNewCardsForStudy).mockResolvedValue(newCards);
-		vi.mocked(mockCardRepo.findDueReviewCardsForStudy).mockResolvedValue(
-			reviewCards,
-		);
-
-		const res = await app.request(`/api/decks/${DECK_ID}/study`, {
-			method: "GET",
-			headers: { Authorization: `Bearer ${authToken}` },
-		});
-
-		expect(res.status).toBe(200);
-		const body = (await res.json()) as StudyResponse;
-		expect(body.cards).toHaveLength(2);
-		expect(body.cards?.[0]?.id).toBe("new-1");
-		expect(body.cards?.[1]?.id).toBe("review-1");
-	});
-
 	it("returns 404 for non-existent deck", async () => {
 		vi.mocked(mockDeckRepo.findById).mockResolvedValue(undefined);
 
diff --git a/src/server/routes/study.ts b/src/server/routes/study.ts
index d05f3ca..0f42f93 100644
--- a/src/server/routes/study.ts
+++ b/src/server/routes/study.ts
@@ -52,20 +52,9 @@ export function createStudyRouter(deps: StudyDependencies) {
 
 			const now = new Date();
 
-			// Calculate new card budget based on today's already-reviewed new cards
-			const reviewedNewCards = await reviewLogRepo.countTodayNewCardReviews(
-				deckId,
-				now,
-			);
-			const newCardBudget = Math.max(0, deck.newCardsPerDay - reviewedNewCards);
+			const cards = await cardRepo.findDueCardsForStudy(deckId, now);
 
-			// Fetch new cards (limited) and review cards separately
-			const [newCards, reviewCards] = await Promise.all([
-				cardRepo.findDueNewCardsForStudy(deckId, now, newCardBudget),
-				cardRepo.findDueReviewCardsForStudy(deckId, now, 80),
-			]);
-
-			return c.json({ cards: [...newCards, ...reviewCards] }, 200);
+			return c.json({ cards }, 200);
 		})
 		.post(
 			"/:cardId",
diff --git a/src/server/routes/sync.test.ts b/src/server/routes/sync.test.ts
index 8ea2ce3..4c0d8d8 100644
--- a/src/server/routes/sync.test.ts
+++ b/src/server/routes/sync.test.ts
@@ -143,7 +143,6 @@ describe("POST /api/sync/push", () => {
 			id: "550e8400-e29b-41d4-a716-446655440000",
 			name: "Test Deck",
 			description: "A test deck",
-			newCardsPerDay: 20,
 			createdAt: "2024-01-01T00:00:00.000Z",
 			updatedAt: "2024-01-02T00:00:00.000Z",
 			deletedAt: null,
@@ -302,7 +301,6 @@ describe("POST /api/sync/push", () => {
 			id: "550e8400-e29b-41d4-a716-446655440003",
 			name: "Test Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: "2024-01-01T00:00:00.000Z",
 			updatedAt: "2024-01-02T00:00:00.000Z",
 			deletedAt: null,
@@ -349,7 +347,6 @@ describe("POST /api/sync/push", () => {
 			id: "not-a-uuid",
 			name: "",
 			description: null,
-			newCardsPerDay: -1,
 			createdAt: "invalid-date",
 			updatedAt: "2024-01-01T00:00:00.000Z",
 			deletedAt: null,
@@ -432,7 +429,6 @@ describe("POST /api/sync/push", () => {
 			id: "550e8400-e29b-41d4-a716-446655440004",
 			name: "Test Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: "2024-01-01T00:00:00.000Z",
 			updatedAt: "2024-01-01T00:00:00.000Z",
 			deletedAt: null,
@@ -634,7 +630,6 @@ describe("POST /api/sync/push", () => {
 			id: "550e8400-e29b-41d4-a716-446655440007",
 			name: "Deleted Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: "2024-01-01T00:00:00.000Z",
 			updatedAt: "2024-01-02T00:00:00.000Z",
 			deletedAt: "2024-01-02T00:00:00.000Z",
@@ -830,7 +825,6 @@ describe("GET /api/sync/pull", () => {
 			userId,
 			name: "Test Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: new Date("2024-01-01T00:00:00.000Z"),
 			updatedAt: new Date("2024-01-02T00:00:00.000Z"),
 			deletedAt: null,
@@ -906,7 +900,6 @@ describe("GET /api/sync/pull", () => {
 			userId,
 			name: "Test Deck",
 			description: "A test description",
-			newCardsPerDay: 20,
 			createdAt: new Date("2024-01-01T00:00:00.000Z"),
 			updatedAt: new Date("2024-01-02T00:00:00.000Z"),
 			deletedAt: null,
@@ -1041,7 +1034,6 @@ describe("GET /api/sync/pull", () => {
 			userId,
 			name: "Test Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: new Date("2024-01-01T00:00:00.000Z"),
 			updatedAt: new Date("2024-01-01T00:00:00.000Z"),
 			deletedAt: null,
@@ -1215,7 +1207,6 @@ describe("GET /api/sync/pull", () => {
 			userId,
 			name: "Deleted Deck",
 			description: null,
-			newCardsPerDay: 20,
 			createdAt: new Date("2024-01-01T00:00:00.000Z"),
 			updatedAt: new Date("2024-01-02T00:00:00.000Z"),
 			deletedAt: new Date("2024-01-02T00:00:00.000Z"),
diff --git a/src/server/routes/sync.ts b/src/server/routes/sync.ts
index c571f8a..a9ea3b3 100644
--- a/src/server/routes/sync.ts
+++ b/src/server/routes/sync.ts
@@ -18,7 +18,6 @@ const syncDeckSchema = z.object({
 	id: z.uuid(),
 	name: z.string().min(1).max(255),
 	description: z.string().nullable(),
-	newCardsPerDay: z.number().int().min(0).max(1000),
 	createdAt: z.string().datetime(),
 	updatedAt: z.string().datetime(),
 	deletedAt: z.string().datetime().nullable(),
diff --git a/src/server/schemas/index.ts b/src/server/schemas/index.ts
index fc1bd77..aa9ceea 100644
--- a/src/server/schemas/index.ts
+++ b/src/server/schemas/index.ts
@@ -48,7 +48,6 @@ export const deckSchema = z.object({
 	userId: z.uuid(),
 	name: z.string().min(1).max(255),
 	description: z.string().max(1000).nullable(),
-	newCardsPerDay: z.number().int().min(0).default(20),
 	createdAt: z.coerce.date(),
 	updatedAt: z.coerce.date(),
 	deletedAt: z.coerce.date().nullable(),
@@ -59,14 +58,12 @@ export const deckSchema = z.object({
 export const createDeckSchema = z.object({
 	name: z.string().min(1).max(255),
 	description: z.string().max(1000).nullable().optional(),
-	newCardsPerDay: z.number().int().min(0).default(20),
 });
 
 // Deck update input schema
 export const updateDeckSchema = z.object({
 	name: z.string().min(1).max(255).optional(),
 	description: z.string().max(1000).nullable().optional(),
-	newCardsPerDay: z.number().int().min(0).optional(),
 });
 
 // Card schema
diff --git a/src/server/types/index.ts b/src/server/types/index.ts
index bfba06f..08f8379 100644
--- a/src/server/types/index.ts
+++ b/src/server/types/index.ts
@@ -33,7 +33,6 @@ export interface Deck {
 	userId: string;
 	name: string;
 	description: string | null;
-	newCardsPerDay: number;
 	createdAt: Date;
 	updatedAt: Date;
 	deletedAt: Date | null;