Polish the printed rough power balance

The printed page kept the dark app background in the page margins, the
consumer column wrapped while the empty remark column took the space, an
empty "bearbeitet von" label was printed, and numbers were printed as
typed (11200). Print margins are white now, the consumer column is wider,
empty editors are omitted and numbers print with thousands separators
(11.200) like the template.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/frontend/estimate-balance/estimate-balance-sheet.tsx

@@ -31,6 +31,7 @@ import {
   formatKw,
   parseGermanDecimal,
   type DecimalRange,
+  formatGermanNumber,
 } from "./estimate-balance-format";
 import { DraftInput } from "./estimate-draft-input";
 
@@ -81,6 +82,7 @@ function NumberInput({
       disabled={disabled}
       format={(current: number) => formatDecimalInput(current)}
       inputMode="decimal"
+      printFormat={(current: number) => formatGermanNumber(current, 0, 3)}
       onCommit={onCommit}
       onValidityChange={(isValid) => onValidityChange(fieldKey, isValid)}
       parse={(text) => parseGermanDecimal(text, range)}
@@ -461,7 +463,13 @@ export function EstimateBalanceSheet({
                 <td colSpan={COLUMN_COUNT - 2}>
                   <div className="estimate-group-title">
                     <span className="estimate-group-name">{group.title}</span>
-                    <label className="estimate-group-editor">
+                    <label
+                      className={
+                        group.editor?.trim()
+                          ? "estimate-group-editor"
+                          : "estimate-group-editor is-empty"
+                      }
+                    >
                       <span>bearbeitet von</span>
                       <input
                         aria-label={`Bearbeitet von (${label})`}