feat(berths): per-berth PDF storage (versioned) + reverse parser

Phase 6b of the berth-recommender refactor (see
docs/berth-recommender-and-pdf-plan.md §3.2, §3.3, §4.7b, §11.1, §14.6).
Builds on the Phase 6a pluggable storage backend (commit 83693dd) — every
file write goes through `getStorageBackend()`; no direct minio imports.

Schema (migration 0030_berth_pdf_versions):
  - new table `berth_pdf_versions` with monotonic `version_number` per
    berth, `storage_key` (renamed convention from §4.7a), sha256, size,
    `download_url_expires_at` cache slot for §11.1 signed-URL throttling,
    and `parse_results` jsonb for the audit trail.
  - new column `berths.current_pdf_version_id` (deferred from Phase 0)
    with FK to `berth_pdf_versions(id)` ON DELETE SET NULL.
  - relations + types exported from `schema/berths.ts`.

3-tier reverse parser (`lib/services/berth-pdf-parser.ts`):
  1. AcroForm via pdf-lib — pulls named fields (`length_ft`,
     `mooring_number`, etc.) at confidence 1. Sample PDF has 0 such
     fields, so this is defensive coverage for future templates.
  2. OCR via Tesseract.js — positional/regex heuristics keyed off the
     §9.2 layout (Length/Width/Water Depth as `<imperial> / <metric>`,
     `WEEK HIGH / LOW`, `CONFIRMED THROUGH UNTIL <date>`, etc.). Returns
     per-field confidence + global mean; flags imperial-vs-metric drift
     >1% in `warnings`.
  3. AI fallback — gated via `getResolvedOcrConfig()` (existing
     openai/claude provider). Surfaced from the diff dialog only when
     `shouldOfferAiTier()` returns true (mean OCR confidence below
     0.55 threshold), so OPENAI_API_KEY isn't burned on every upload.

Service layer (`lib/services/berth-pdf.service.ts`):
  - `uploadBerthPdf()` — magic-byte check, size cap, version-number
    bump + current pointer in one transaction.
  - `reconcilePdfWithBerth()` — auto-applies fields where CRM is null;
    flags conflicts when CRM and PDF disagree; tolerates ±1% on numeric
    columns; warns on mooring-number-in-PDF mismatch (§14.6).
  - `applyParseResults()` — hard allowlist of writable columns;
    stamps `appliedFields` onto `parse_results` for audit.
  - `rollbackToVersion()` — pointer flip only, never re-parses (§14.6).
  - `listBerthPdfVersions()` — version list with 15-min signed URLs.
  - `getMaxUploadMb()` — port-override → global → default 15 lookup
    on `system_settings.berth_pdf_max_upload_mb`.

§14.6 critical mitigations:
  - Magic-byte check (`%PDF-`) on every upload; mismatch deletes the
    storage object and rejects the request.
  - Size cap from `system_settings.berth_pdf_max_upload_mb` (default
    15 MB); enforced in the upload-url presign AND server-side.
  - 0-byte uploads rejected.
  - Mooring-number mismatch surfaces as a `warnings[]` entry on the
    reconcile result so the rep sees it in the diff dialog.
  - Imperial vs metric ±1% tolerance in both the parser warnings and
    the reconcile equality check.
  - Path traversal already blocked at the storage layer (Phase 6a).

API + UI:
  - `POST /api/v1/berths/[id]/pdf-upload-url` — presigned URL (S3) or
    HMAC-signed proxy URL (filesystem) sized to the per-port cap.
  - `POST /api/v1/berths/[id]/pdf-versions` — verifies the upload via
    `backend.head()`, writes the row, bumps `current_pdf_version_id`.
  - `GET /api/v1/berths/[id]/pdf-versions` — version list + signed URLs.
  - `POST /api/v1/berths/[id]/pdf-versions/[versionId]/rollback`.
  - `POST /api/v1/berths/[id]/pdf-versions/parse-results/apply` —
    rep-confirmed diff payload.
  - New "Documents" tab on the berth detail page (`berth-tabs.tsx`)
    with current-PDF panel, version history, Replace PDF button, and
    `<PdfReconcileDialog>` for the auto-applied + conflicts UX.

System settings:
  - `berth_pdf_max_upload_mb` (default 15) — caps presigned-upload size
    + server-side validation. Resolved port-override → global → default.

Tests:
  - `tests/unit/services/berth-pdf-parser.test.ts` — magic bytes,
    feet-inches, human dates, full §9.2-shaped OCR text → 18 fields,
    drift warning, AI-tier gate.
  - `tests/unit/services/berth-pdf-acroform.test.ts` — synthetic
    pdf-lib AcroForm round-trip.
  - `tests/integration/berth-pdf-versions.test.ts` — upload, version-
    number bump, magic-byte rejection, reconcile auto-applied vs
    conflicts vs ±1% tolerance, mooring-number warning,
    applyParseResults allowlist enforcement, rollback semantics.

Acceptance: `pnpm exec tsc --noEmit` clean, `pnpm exec vitest run`
green at 1103/1103.

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

tests/integration/berth-pdf-versions.test.ts

@@ -0,0 +1,271 @@
+/**
+ * Integration tests for the per-berth PDF service (Phase 6b).
+ *
+ * Covers:
+ *   - uploadBerthPdf creates a row + bumps the berth pointer.
+ *   - Magic-byte rejection deletes the storage object.
+ *   - reconcilePdfWithBerth classifies CRM-null → autoApplied, mismatch →
+ *     conflicts, and respects the ±1% numeric tolerance.
+ *   - Mooring-number mismatch surfaces as a warning (§14.6).
+ *   - applyParseResults writes only allowlisted fields.
+ *   - rollbackToVersion flips the current pointer without re-parsing.
+ */
+
+import { eq } from 'drizzle-orm';
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+
+import {
+  applyParseResults,
+  reconcilePdfWithBerth,
+  rollbackToVersion,
+  uploadBerthPdf,
+} from '@/lib/services/berth-pdf.service';
+import type { ParseResult } from '@/lib/services/berth-pdf-parser';
+import { db } from '@/lib/db';
+import { berths, berthPdfVersions } from '@/lib/db/schema/berths';
+import { systemSettings } from '@/lib/db/schema/system';
+
+import { makeBerth, makePort } from '../helpers/factories';
+
+// Drop the global `storage_backend` row so the factory falls back to the
+// filesystem default when these tests run in isolation. (Other suites set it.)
+beforeEach(async () => {
+  await db
+    .insert(systemSettings)
+    .values({
+      key: 'storage_backend',
+      value: 'filesystem',
+      portId: null,
+      updatedBy: null,
+    })
+    .onConflictDoNothing();
+});
+
+afterEach(async () => {
+  // No file cleanup needed — the filesystem backend writes to a tmp root.
+});
+
+function fakePdf(): Buffer {
+  // Smallest possible byte sequence the magic-byte check accepts.
+  return Buffer.concat([Buffer.from('%PDF-1.7\n'), Buffer.alloc(64, 0x20)]);
+}
+
+function parseResult(): ParseResult {
+  return {
+    engine: 'ocr',
+    fields: {
+      lengthFt: { value: 200, confidence: 0.9, engine: 'ocr' },
+      bowFacing: { value: 'East', confidence: 0.9, engine: 'ocr' },
+    },
+    meanConfidence: 0.9,
+    warnings: [],
+  };
+}
+
+describe('uploadBerthPdf', () => {
+  it('writes a version and updates currentPdfVersionId', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({ portId: port.id });
+
+    const result = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'A1.pdf',
+      uploadedBy: 'test-user',
+      parseResult: parseResult(),
+    });
+    expect(result.versionNumber).toBe(1);
+    expect(result.versionId).toMatch(/^[0-9a-f-]{36}$/);
+
+    const refreshed = await db.query.berths.findFirst({ where: eq(berths.id, berth.id) });
+    expect(refreshed?.currentPdfVersionId).toBe(result.versionId);
+
+    const versionRow = await db.query.berthPdfVersions.findFirst({
+      where: eq(berthPdfVersions.id, result.versionId),
+    });
+    expect(versionRow?.versionNumber).toBe(1);
+    expect(versionRow?.fileName).toBe('A1.pdf');
+    expect((versionRow?.parseResults as { engine: string }).engine).toBe('ocr');
+  });
+
+  it('rejects a buffer that fails the magic-byte check', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({ portId: port.id });
+    await expect(
+      uploadBerthPdf({
+        berthId: berth.id,
+        buffer: Buffer.from('not a pdf at all'),
+        fileName: 'spoof.pdf',
+        uploadedBy: 'test-user',
+      }),
+    ).rejects.toThrow(/magic-byte/);
+  });
+
+  it('increments versionNumber on the second upload', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({ portId: port.id });
+    await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'v1.pdf',
+      uploadedBy: 'test',
+    });
+    const second = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'v2.pdf',
+      uploadedBy: 'test',
+    });
+    expect(second.versionNumber).toBe(2);
+  });
+});
+
+describe('reconcilePdfWithBerth', () => {
+  it('auto-applies fields where the CRM column is null', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({
+      portId: port.id,
+      overrides: { mooringNumber: 'A1', lengthFt: null, bowFacing: null },
+    });
+    const result = await reconcilePdfWithBerth(berth.id, {
+      engine: 'ocr',
+      fields: {
+        lengthFt: { value: 200, confidence: 0.9, engine: 'ocr' },
+        bowFacing: { value: 'East', confidence: 0.9, engine: 'ocr' },
+      },
+      meanConfidence: 0.9,
+      warnings: [],
+    });
+    const fields = result.autoApplied.map((a) => a.field).sort();
+    expect(fields).toEqual(['bowFacing', 'lengthFt']);
+    expect(result.conflicts).toHaveLength(0);
+  });
+
+  it('flags conflicts when CRM and PDF disagree on a non-null value', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({
+      portId: port.id,
+      overrides: { mooringNumber: 'A1', lengthFt: '100', bowFacing: 'West' },
+    });
+    const result = await reconcilePdfWithBerth(berth.id, {
+      engine: 'ocr',
+      fields: {
+        lengthFt: { value: 200, confidence: 0.8, engine: 'ocr' },
+        bowFacing: { value: 'East', confidence: 0.8, engine: 'ocr' },
+      },
+      meanConfidence: 0.8,
+      warnings: [],
+    });
+    expect(result.conflicts.map((c) => c.field).sort()).toEqual(['bowFacing', 'lengthFt']);
+  });
+
+  it('treats a 0.5% numeric difference as equal (±1% tolerance)', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({
+      portId: port.id,
+      overrides: { mooringNumber: 'A1', lengthFt: '200' },
+    });
+    const result = await reconcilePdfWithBerth(berth.id, {
+      engine: 'ocr',
+      fields: {
+        lengthFt: { value: 201, confidence: 0.9, engine: 'ocr' }, // +0.5%
+      },
+      meanConfidence: 0.9,
+      warnings: [],
+    });
+    expect(result.conflicts).toHaveLength(0);
+    expect(result.autoApplied).toHaveLength(0);
+  });
+
+  it('warns when the PDF mooring number does not match the berth', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({
+      portId: port.id,
+      overrides: { mooringNumber: 'A1' },
+    });
+    const result = await reconcilePdfWithBerth(berth.id, {
+      engine: 'ocr',
+      fields: {
+        mooringNumber: { value: 'B5', confidence: 0.9, engine: 'ocr' },
+      },
+      meanConfidence: 0.9,
+      warnings: [],
+    });
+    expect(result.warnings.some((w) => /B5/.test(w) && /A1/.test(w))).toBe(true);
+  });
+});
+
+describe('applyParseResults', () => {
+  it('updates only allowlisted fields and stamps appliedFields onto the version', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({
+      portId: port.id,
+      overrides: { mooringNumber: 'A1', lengthFt: null, bowFacing: null },
+    });
+    const upload = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'A1.pdf',
+      uploadedBy: 'test',
+    });
+
+    await applyParseResults(berth.id, upload.versionId, {
+      lengthFt: 200,
+      bowFacing: 'East',
+      // unknown / non-allowlisted column should be silently dropped:
+      // @ts-expect-error — testing the allowlist
+      hackThePlanet: 'pwn',
+    });
+
+    const refreshed = await db.query.berths.findFirst({ where: eq(berths.id, berth.id) });
+    expect(refreshed?.lengthFt).toBe('200');
+    expect(refreshed?.bowFacing).toBe('East');
+
+    const versionRow = await db.query.berthPdfVersions.findFirst({
+      where: eq(berthPdfVersions.id, upload.versionId),
+    });
+    const applied = (versionRow?.parseResults as { appliedFields?: string[] }).appliedFields;
+    expect(applied).toEqual(expect.arrayContaining(['lengthFt', 'bowFacing']));
+    expect(applied).not.toContain('hackThePlanet');
+  });
+});
+
+describe('rollbackToVersion', () => {
+  it('flips current_pdf_version_id to the requested version without re-parsing', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({ portId: port.id });
+    const v1 = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'v1.pdf',
+      uploadedBy: 'test',
+    });
+    const v2 = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'v2.pdf',
+      uploadedBy: 'test',
+    });
+
+    let refreshed = await db.query.berths.findFirst({ where: eq(berths.id, berth.id) });
+    expect(refreshed?.currentPdfVersionId).toBe(v2.versionId);
+
+    const result = await rollbackToVersion(berth.id, v1.versionId);
+    expect(result.versionNumber).toBe(1);
+
+    refreshed = await db.query.berths.findFirst({ where: eq(berths.id, berth.id) });
+    expect(refreshed?.currentPdfVersionId).toBe(v1.versionId);
+  });
+
+  it('refuses to roll back to the already-current version', async () => {
+    const port = await makePort();
+    const berth = await makeBerth({ portId: port.id });
+    const v1 = await uploadBerthPdf({
+      berthId: berth.id,
+      buffer: fakePdf(),
+      fileName: 'v1.pdf',
+      uploadedBy: 'test',
+    });
+    await expect(rollbackToVersion(berth.id, v1.versionId)).rejects.toThrow(/already current/);
+  });
+});