Add print cover fields and office profile

- Project settings gain siteAddress, workStage, projectLead and
  projectEditor (project.update-settings schema version 3, migration 0009);
  versions 2 and 1 stay executable and keep the current cover values.
  Snapshot schema 6 carries the fields; older versions upgrade with null.
- Global office profile (office name/address) next to the document logo:
  table document_branding_settings, PUT /api/document-branding/office,
  editable from the print view toolbar.
- Cover page reads all fields; empty values show the "[ergänzen]" marker.
  The Planstände editor column shows the project editor.
- Shared logo constants moved to a dependency-free module so the Next.js
  bundler can import them.

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

src/shared/constants/document-branding.ts

@@ -0,0 +1,9 @@
+export const documentLogoMimeTypes = [
+  "image/png",
+  "image/jpeg",
+  "image/svg+xml",
+] as const;
+
+export type DocumentLogoMimeType = (typeof documentLogoMimeTypes)[number];
+
+export const maxDocumentLogoBytes = 2 * 1024 * 1024;

src/shared/constants/project-cover.ts

@@ -0,0 +1,45 @@
+/**
+ * Project data shown on the print view cover page. They are ordinary project
+ * settings (persisted through `project.update-settings`, part of logical
+ * snapshots and project transfer).
+ */
+export const projectCoverFields = [
+  "siteAddress",
+  "workStage",
+  "projectLead",
+  "projectEditor",
+] as const;
+
+export type ProjectCoverField = (typeof projectCoverFields)[number];
+
+export const projectCoverFieldLabels: Record<ProjectCoverField, string> = {
+  siteAddress: "Anschrift Bauvorhaben",
+  workStage: "Leistungsphase",
+  projectLead: "Projektleitung",
+  projectEditor: "Bearbeitung",
+};
+
+export const projectCoverFieldMaxLengths: Record<ProjectCoverField, number> = {
+  siteAddress: 500,
+  workStage: 100,
+  projectLead: 200,
+  projectEditor: 200,
+};
+
+/**
+ * Office-wide data for the cover page ("Planverfasser"). Global branding like
+ * the document logo, outside project revisions and snapshots.
+ */
+export const officeProfileFields = ["officeName", "officeAddress"] as const;
+
+export type OfficeProfileField = (typeof officeProfileFields)[number];
+
+export const officeProfileFieldLabels: Record<OfficeProfileField, string> = {
+  officeName: "Büro",
+  officeAddress: "Anschrift Büro",
+};
+
+export const officeProfileFieldMaxLengths: Record<OfficeProfileField, number> = {
+  officeName: 200,
+  officeAddress: 500,
+};

src/shared/validation/document-branding.schemas.ts

@@ -1,14 +1,15 @@
 import { z } from "zod";
+import {
+  documentLogoMimeTypes,
+  maxDocumentLogoBytes,
+} from "../constants/document-branding.js";
+import { officeProfileFieldMaxLengths } from "../constants/project-cover.js";
 
-export const documentLogoMimeTypes = [
-  "image/png",
-  "image/jpeg",
-  "image/svg+xml",
-] as const;
-
-export type DocumentLogoMimeType = (typeof documentLogoMimeTypes)[number];
-
-export const maxDocumentLogoBytes = 2 * 1024 * 1024;
+export {
+  documentLogoMimeTypes,
+  maxDocumentLogoBytes,
+  type DocumentLogoMimeType,
+} from "../constants/document-branding.js";
 
 export const uploadDocumentLogoSchema = z
   .object({
@@ -23,3 +24,19 @@ export const uploadDocumentLogoSchema = z
   .strict();
 
 export type UploadDocumentLogoInput = z.infer<typeof uploadDocumentLogoSchema>;
+
+// Empty text is stored as "not set" (null).
+const officeValueSchema = (maximumLength: number) =>
+  z
+    .string()
+    .trim()
+    .max(maximumLength)
+    .nullable()
+    .transform((value) => (value ? value : null));
+
+export const updateOfficeProfileSchema = z
+  .object({
+    officeName: officeValueSchema(officeProfileFieldMaxLengths.officeName),
+    officeAddress: officeValueSchema(officeProfileFieldMaxLengths.officeAddress),
+  })
+  .strict();

src/shared/validation/project-structure.schemas.ts

@@ -4,8 +4,22 @@ import {
   distributionBoardSupplyTypes,
   type DistributionBoardInfoField,
 } from "../constants/distribution-board.js";
+import {
+  projectCoverFieldMaxLengths,
+  type ProjectCoverField,
+} from "../constants/project-cover.js";
 import { expectedProjectRevisionSchema } from "./project-command.schemas.js";
 
+// Empty text is stored as null so "not entered" has one representation.
+const optionalCoverValueSchema = (field: ProjectCoverField) =>
+  z
+    .string()
+    .trim()
+    .max(projectCoverFieldMaxLengths[field])
+    .nullable()
+    .transform((value) => (value ? value : null))
+    .optional();
+
 export const createProjectSchema = z.object({
   name: z.string().trim().min(1).max(200),
   internalProjectNumber: z.string().trim().max(100).optional(),
@@ -34,6 +48,11 @@ export const updateProjectSettingsSchema = z
       .refine((values) => new Set(values).size === values.length, {
         message: "Netzarten dürfen nicht mehrfach ausgewählt werden.",
       }),
+    // Print cover fields; omitted fields keep their current value.
+    siteAddress: optionalCoverValueSchema("siteAddress"),
+    workStage: optionalCoverValueSchema("workStage"),
+    projectLead: optionalCoverValueSchema("projectLead"),
+    projectEditor: optionalCoverValueSchema("projectEditor"),
   })
   .strict();