Fix financial export array binding and add SVG favicon

- Replace raw `ANY(${array})` SQL with drizzle's inArray() in
  src/lib/server/export/financial.ts; the raw form sent UUID arrays
  in a malformed Postgres array literal causing 500 on download
- Add static/favicon.svg (Thai baht symbol on blue square) and point
  app.html at it; remove the empty favicon.png
- Redirect /favicon.ico to /favicon.svg in hooks.server.ts so
  browsers' implicit fallback request stops 404'ing

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

src/lib/server/export/financial.ts

@@ -22,7 +22,7 @@ import {
 } from '../db/schema.js';
 import { csvBuild } from '$lib/utils/csv.js';
 import { CARRIER_LABELS } from '../shipping/index.js';
-import { eq, and, sql, asc } from 'drizzle-orm';
+import { eq, and, sql, asc, inArray } from 'drizzle-orm';
 import { alias } from 'drizzle-orm/pg-core';
 
 const PROVIDER_LABELS: Record<string, string> = {
@@ -362,9 +362,7 @@ export async function buildFinancialExport(
 						})
 						.from(invoiceLineItems)
 						.innerJoin(invoices, eq(invoiceLineItems.invoiceId, invoices.id))
-						.where(
-							sql`${invoiceLineItems.invoiceId} = ANY(${invoiceIds})`
-						);
+						.where(inArray(invoiceLineItems.invoiceId, invoiceIds));
 
 		const rows: unknown[][] = [
 			['id', 'invoiceId', 'invoiceNumber', 'description', 'quantity', 'unitPrice', 'total']
@@ -496,7 +494,7 @@ export async function buildFinancialExport(
 						.from(payslipLineItems)
 						.innerJoin(payslips, eq(payslipLineItems.payslipId, payslips.id))
 						.innerJoin(employees, eq(payslips.employeeId, employees.id))
-						.where(sql`${payslipLineItems.payslipId} = ANY(${payslipIds})`);
+						.where(inArray(payslipLineItems.payslipId, payslipIds));
 
 		const rows: unknown[][] = [
 			['id', 'payslipId', 'payslipPeriod', 'employeeName', 'type', 'label', 'amount', 'isStatutory']