feat: refactor character history schema and related logic for improved date handling and data integrity

src/lib/server/daily-character.ts

@@ -139,19 +139,19 @@ async function applyCharacterOverrides(
 	);
 }
 
-function getDateKey(date: Date): string {
-	return date.toISOString().split('T')[0];
+export function getDateKey(date: Date): number {
+	return normalizeDay(date).getTime();
 }
 
-function normalizeDay(date: Date = new Date()): Date {
+export function normalizeDay(date: Date = new Date()): Date {
 	const normalized = new Date(date);
 	normalized.setHours(1, 0, 0, 0);
 	return normalized;
 }
 
 function pickDailyCharacter(characters: CharacterWithRelations[], date: Date): CharacterWithRelations {
-	const dateStr = getDateKey(date);
-	const seed = dateStr.split('-').reduce((acc, value) => acc + parseInt(value), 0);
+	const timestamp = getDateKey(date);
+	const seed = Math.floor(timestamp / 1000 / 60 / 60 / 24);
 	const index = seed % characters.length;
 	return characters[index];
 }
@@ -254,9 +254,9 @@ export async function getYesterdayCharacter(
 	date: Date = new Date(),
 	characters?: CharacterWithRelations[]
 ): Promise<CharacterWithRelations | null> {
-	const baseDate = normalizeDay(date);
-	baseDate.setDate(baseDate.getDate() - 1);
-	const yesterdayDate = getDateKey(baseDate);
+	const yesterday = new Date(date);
+	yesterday.setDate(yesterday.getDate() - 1);
+	const yesterdayDate = getDateKey(yesterday);
 
 	const [yesterdayEntry] = await db
 		.select()

src/lib/server/db/schema.ts

@@ -100,7 +100,7 @@ export const characterHistory = sqliteTable('characterHistory', {
 		.primaryKey()
 		.$defaultFn(() => crypto.randomUUID()),
 	characterId: text('characterId').references(() => character.id),
-	date: text('date'),
+	date: integer('date').notNull().unique(),
 	won: integer('won').notNull().default(0),
 	createdAt: integer('createdAt').notNull().$default(() => Date.now()),
 	updatedAt: integer('updatedAt').notNull().$default(() => Date.now()),

src/routes/(game)/daily/+server.ts

@@ -3,6 +3,7 @@ import { db } from '$lib/server/db';
 import { characterHistory } from '$lib/server/db/schema';
 import { eq } from 'drizzle-orm';
 import { sql } from 'drizzle-orm';
+import { getDateKey } from '$lib/server/daily-character';
 
 export async function POST({ request }) {
 	try {
@@ -12,9 +13,7 @@ export async function POST({ request }) {
 			return json({ error: 'Missing characterId' }, { status: 400 });
 		}
 
-		const today = new Date();
-		today.setHours(0, 0, 0, 0);
-		const todayDate = today.toISOString().split('T')[0];
+		const todayDate = getDateKey(new Date());
 
 		// Increment the won counter for today's entry
 		await db