Fix unpaid-Vorkasse notice layout: full page width, more top spacing

Reused paidBadgeRow, which lives inside summary's narrow flex-end
column meant for the short one-line paid confirmation — the longer
instruction shrank to content width and read as squeezed under the
summary card. Moved to its own full-width sibling row, left-aligned.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@einfach-produktiv/invoicing",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "private": true,
   "description": "Shared invoice / correction-invoice (Stornorechnung, Gutschrift) PDF generation and VAT-breakdown math, consumed as a git dependency by both the einfach-produktiv frontend and the payload backend — not published to npm.",
   "type": "module",