fix: fehlende Dateien fuer Etiketten-Elemente-Umbau nachreichen

git add -u im letzten Commit hat neue (untracked) Dateien übersprungen:
die Migration für LabelTemplate.elements, die neuen Typ-/DTO-Dateien und
den kompletten Drag-and-Drop-Editor fehlten dadurch im Build.

ApiCore-Backend/src/label-templates/dto/label-element.dto.ts

@@ -0,0 +1,116 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import {
+  IsBoolean,
+  IsIn,
+  IsNumber,
+  IsOptional,
+  IsString,
+  MaxLength,
+} from 'class-validator';
+import { PLACEHOLDER_KEYS } from '../label-element.types';
+
+const ELEMENT_TYPES = ['text', 'qrCode', 'image', 'line'] as const;
+const FONT_FAMILIES = ['sans', 'serif', 'mono'] as const;
+const TEXT_ALIGNS = ['left', 'center', 'right'] as const;
+const LINE_ORIENTATIONS = ['horizontal', 'vertical'] as const;
+
+// One DTO shared by all element types rather than a discriminated-union of
+// four DTOs: this is an internal, permission-gated design surface (not
+// public input), so the pragmatic boundary check is "every field has the
+// right primitive type" - the service picks which fields it reads per
+// `type` at render time.
+export class LabelElementDto {
+  @ApiProperty()
+  @IsString()
+  id!: string;
+
+  @ApiProperty({ enum: ELEMENT_TYPES })
+  @IsIn(ELEMENT_TYPES)
+  type!: (typeof ELEMENT_TYPES)[number];
+
+  @ApiProperty()
+  @IsNumber()
+  x!: number;
+
+  @ApiProperty()
+  @IsNumber()
+  y!: number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  width?: number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  height?: number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  size?: number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  length?: number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  thickness?: number;
+
+  @ApiPropertyOptional({ description: 'text-Element: literaler Text' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(500)
+  text?: string;
+
+  @ApiPropertyOptional({ enum: PLACEHOLDER_KEYS })
+  @IsOptional()
+  @IsIn(PLACEHOLDER_KEYS)
+  placeholderKey?: (typeof PLACEHOLDER_KEYS)[number] | null;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsNumber()
+  fontSize?: number;
+
+  @ApiPropertyOptional({ enum: FONT_FAMILIES })
+  @IsOptional()
+  @IsIn(FONT_FAMILIES)
+  fontFamily?: (typeof FONT_FAMILIES)[number];
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsBoolean()
+  bold?: boolean;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsBoolean()
+  italic?: boolean;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  @MaxLength(20)
+  color?: string;
+
+  @ApiPropertyOptional({ enum: TEXT_ALIGNS })
+  @IsOptional()
+  @IsIn(TEXT_ALIGNS)
+  align?: (typeof TEXT_ALIGNS)[number];
+
+  @ApiPropertyOptional({ enum: LINE_ORIENTATIONS })
+  @IsOptional()
+  @IsIn(LINE_ORIENTATIONS)
+  orientation?: (typeof LINE_ORIENTATIONS)[number];
+
+  @ApiPropertyOptional({ description: 'image-Element: data: URL (PNG/JPEG)' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(3_000_000)
+  src?: string;
+}

ApiCore-Backend/src/label-templates/label-element.types.ts

@@ -0,0 +1,57 @@
+export type LabelFontFamily = 'sans' | 'serif' | 'mono';
+export type LabelTextAlign = 'left' | 'center' | 'right';
+export type LabelLineOrientation = 'horizontal' | 'vertical';
+
+export const PLACEHOLDER_KEYS = [
+  'batchNumber',
+  'honeyType',
+  'lotNumber',
+  'bottlingDate',
+  'bestBeforeDate',
+  'jarSize',
+  'productName',
+] as const;
+export type PlaceholderKey = (typeof PLACEHOLDER_KEYS)[number];
+
+interface LabelElementBase {
+  id: string;
+  x: number;
+  y: number;
+}
+
+export interface LabelTextElement extends LabelElementBase {
+  type: 'text';
+  width: number;
+  height: number;
+  text: string;
+  placeholderKey?: PlaceholderKey | null;
+  fontSize: number;
+  fontFamily: LabelFontFamily;
+  bold: boolean;
+  italic: boolean;
+  color: string;
+  align: LabelTextAlign;
+}
+
+export interface LabelQrCodeElement extends LabelElementBase {
+  type: 'qrCode';
+  size: number;
+}
+
+export interface LabelImageElement extends LabelElementBase {
+  type: 'image';
+  width: number;
+  height: number;
+  src: string;
+}
+
+export interface LabelLineElement extends LabelElementBase {
+  type: 'line';
+  length: number;
+  thickness: number;
+  color: string;
+  orientation: LabelLineOrientation;
+}
+
+export type LabelElement =
+  LabelTextElement | LabelQrCodeElement | LabelImageElement | LabelLineElement;