feat(document-templates): delete TipTap-to-pdfme bridge

Phase 1 / commit 12 of 14 — strips out the 571-line tiptap-to-pdfme
serializer and every code path that depended on it. TipTap document
templates remain as Documenso-template seed bodies; the CRM no longer
renders them to PDF in-app.

Deleted:
  src/lib/pdf/tiptap-to-pdfme.ts                                (571 LOC)
  src/lib/pdf/templates/eoi-standard-inapp.ts                   (337 LOC)
  src/app/api/v1/admin/templates/preview/route.ts
  src/app/api/v1/document-templates/[id]/generate/route.ts
  src/app/api/v1/document-templates/[id]/generate-and-send/route.ts
  src/lib/services/document-templates.ts:generateFromTemplate (~140 LOC)
  src/lib/services/document-templates.ts:generateAndSend       (~40 LOC)
  src/lib/validators/document-templates.ts:generateAndSendSchema
  src/lib/validators/document-templates.ts:previewAdminTemplateSchema
  tests/unit/tiptap-serializer.test.ts (old bridge tests)

Preserved as src/lib/pdf/tiptap-validation.ts (~70 LOC):
  - validateTipTapDocument()  — still used to reject unsupported nodes
    on save in the admin template editor
  - TEMPLATE_VARIABLES        — drives the merge-token picker in the
    admin template form + preview UI

generateAndSign() now throws a clear ValidationError when a non-EOI
template tries the in-app pathway. Use a Documenso template, or wait
for the deferred AcroForm-fill admin-upload feature.

seed-data.ts: "Standard EOI (in-app)" template row now seeds with stub
bodyHtml + small MERGE_FIELDS array; the deleted HTML helper was never
actually rendered (in-app EOI is pdf-lib AcroForm fill on the source
PDF — generateEoiPdfFromTemplate, unchanged).

After this commit, pdfme has zero callers left. Commit 14 drops the
deps and the generate.ts shim.

1298/1298 vitest green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/db/seed-data.ts

@@ -42,12 +42,26 @@ import {
   interestBerths,
   documentTemplates,
 } from './schema';
-import {
-  getStandardEoiTemplateHtml,
-  STANDARD_EOI_MERGE_FIELDS,
-} from '@/lib/pdf/templates/eoi-standard-inapp';
 import berthSnapshot from './seed-data/berths.json';
 
+// Seed body for the default "Standard EOI" document_templates row.
+// The in-app EOI pathway renders via pdf-lib AcroForm fill on the source PDF
+// (see src/lib/pdf/fill-eoi-form.ts), not from this HTML. The bodyHtml is
+// retained so admins have a starting point if they want to use the template
+// row as a Documenso template body, but it's no longer rendered by the CRM.
+const STANDARD_EOI_BODY_HTML =
+  '<p>This Expression of Interest is signed via Documenso. The CRM no longer renders this body to PDF; see the in-app AcroForm pathway in fill-eoi-form.ts.</p>';
+const STANDARD_EOI_MERGE_FIELDS = [
+  'date.today',
+  'date.year',
+  'port.name',
+  'client.fullName',
+  'client.primaryEmail',
+  'yacht.name',
+  'berth.mooringNumber',
+  'interest.stage',
+];
+
 // ─── Berth snapshot ──────────────────────────────────────────────────────────
 // 117 rows imported from the legacy NocoDB Berths table on 2026-05-03.
 // Refresh via `pnpm tsx scripts/import-berths-from-nocodb.ts --update-snapshot`.
@@ -798,7 +812,7 @@ export async function seedPortData(portId: string, portSlug: string): Promise<Se
       description:
         'Default Expression of Interest / Letter of Intent template, rendered in-app via pdfme. Use for ports that prefer in-app PDF generation over the Documenso template path.',
       templateType: 'eoi',
-      bodyHtml: getStandardEoiTemplateHtml(),
+      bodyHtml: STANDARD_EOI_BODY_HTML,
       mergeFields: STANDARD_EOI_MERGE_FIELDS,
       isActive: true,
       createdBy: SEED_USER_ID,