fix(deck): change review card limit to 80 and simplify deck detail stats

Review card limit is reduced from 100 to 80 across deck list, deck detail,
and study routes. Deck detail page now shows only total card count and due
card count (with budget limits applied), matching the deck list and study
screen numbers.

https://claude.ai/code/session_01NAj4waQhwSSXV9EbgioX2j

1 files changed, 6 insertions, 23 deletions

diff --git a/src/client/pages/DeckDetailPage.test.tsx b/src/client/pages/DeckDetailPage.test.tsx
index 815dff1..3c741ad 100644
--- a/src/client/pages/DeckDetailPage.test.tsx
+++ b/src/client/pages/DeckDetailPage.test.tsx
@@ -258,33 +258,16 @@ describe("DeckDetailPage", () => {
 		);
 	});
 
-	it("displays card counts by state", () => {
+	it("displays due card count from deck data", () => {
 		renderWithProviders({
-			initialDeck: mockDeck,
+			initialDeck: { ...mockDeck, dueCardCount: 5 },
 			initialCards: mockCards,
 		});
 
-		// New cards (state=0, but card-1 is not due yet, so 0)
-		const newLabel = screen.getByText("New");
-		expect(newLabel).toBeDefined();
-		const newContainer = newLabel.parentElement;
-		expect(newContainer?.querySelector(".text-info")?.textContent).toBe("0");
-
-		// Learning cards (state=1 or 3, none in mockCards)
-		const learningLabel = screen.getByText("Learning");
-		expect(learningLabel).toBeDefined();
-		const learningContainer = learningLabel.parentElement;
-		expect(learningContainer?.querySelector(".text-warning")?.textContent).toBe(
-			"0",
-		);
-
-		// Review cards (state=2, card-2 is due now)
-		const reviewLabel = screen.getByText("Review");
-		expect(reviewLabel).toBeDefined();
-		const reviewContainer = reviewLabel.parentElement;
-		expect(reviewContainer?.querySelector(".text-success")?.textContent).toBe(
-			"1",
-		);
+		const dueLabel = screen.getByText("Due");
+		expect(dueLabel).toBeDefined();
+		const dueContainer = dueLabel.parentElement;
+		expect(dueContainer?.querySelector(".text-primary")?.textContent).toBe("5");
 	});
 
 	it("does not display card list (cards are hidden)", () => {