Add recurring bills schema and cycle math helper

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/server/db/schema.ts

@@ -944,6 +944,61 @@ export const companyAccountTransactions = pgTable(
 	]
 );
 
+// ── Recurring Bills ────────────────────────────────────
+
+export const recurringBillCycleEnum = pgEnum('recurring_bill_cycle', [
+	'weekly',
+	'monthly',
+	'quarterly',
+	'yearly'
+]);
+
+export const recurringBillStatusEnum = pgEnum('recurring_bill_status', [
+	'active',
+	'paused',
+	'ended'
+]);
+
+export const recurringBills = pgTable(
+	'recurring_bills',
+	{
+		id: uuid('id').primaryKey().defaultRandom(),
+		companyId: uuid('company_id')
+			.notNull()
+			.references(() => companies.id, { onDelete: 'cascade' }),
+		projectId: uuid('project_id')
+			.notNull()
+			.references(() => projects.id, { onDelete: 'restrict' }),
+		accountId: uuid('account_id')
+			.notNull()
+			.references(() => companyAccounts.id, { onDelete: 'restrict' }),
+		categoryId: uuid('category_id').references(() => categories.id, { onDelete: 'set null' }),
+		partyId: uuid('party_id').references(() => parties.id, { onDelete: 'set null' }),
+		name: text('name').notNull(),
+		description: text('description'),
+		cycle: recurringBillCycleEnum('cycle').notNull(),
+		defaultAmount: numeric('default_amount', { precision: 15, scale: 2 }).notNull(),
+		nextCycleAmount: numeric('next_cycle_amount', { precision: 15, scale: 2 }),
+		currency: text('currency').notNull().default('THB'),
+		dayOfCycle: integer('day_of_cycle'),
+		startDate: date('start_date').notNull(),
+		endDate: date('end_date'),
+		nextDueDate: date('next_due_date').notNull(),
+		lastPostedDate: date('last_posted_date'),
+		status: recurringBillStatusEnum('status').notNull().default('active'),
+		pausedAt: timestamp('paused_at', { withTimezone: true }),
+		skipNext: boolean('skip_next').notNull().default(false),
+		createdBy: text('created_by').references(() => users.id, { onDelete: 'set null' }),
+		deletedAt: timestamp('deleted_at', { withTimezone: true }),
+		createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+		updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow()
+	},
+	(table) => [
+		index('recurring_bills_company_next_due_idx').on(table.companyId, table.nextDueDate),
+		index('recurring_bills_company_status_idx').on(table.companyId, table.status)
+	]
+);
+
 export const companyAddresses = pgTable(
 	'company_addresses',
 	{
@@ -1037,7 +1092,14 @@ export const companyLogEventEnum = pgEnum('company_log_event', [
 	'account_deleted',
 	'account_transaction_added',
 	'account_transfer_posted',
-	'account_reconciled'
+	'account_reconciled',
+	'recurring_bill_created',
+	'recurring_bill_updated',
+	'recurring_bill_deleted',
+	'recurring_bill_paused',
+	'recurring_bill_resumed',
+	'recurring_bill_skipped',
+	'recurring_bill_posted'
 ]);
 
 export const companyLog = pgTable(