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/unit/services/berth-pdf-parser.test.ts

@@ -0,0 +1,193 @@
+/**
+ * Unit tests for the berth PDF parser (Phase 6b — see plan §4.7b, §14.6).
+ *
+ * Covers:
+ *   - Magic-byte check (`%PDF-`).
+ *   - OCR-tier extraction against text matching the §9.2 layout.
+ *   - Imperial-vs-metric tolerance warning.
+ *   - feet-inches parser, human-date parser.
+ *   - Threshold gate that decides when to offer the AI tier.
+ */
+
+import { describe, expect, it } from 'vitest';
+
+import {
+  extractFromOcrText,
+  isPdfMagic,
+  parseFeetInches,
+  parseHumanDate,
+  shouldOfferAiTier,
+} from '@/lib/services/berth-pdf-parser';
+
+describe('isPdfMagic', () => {
+  it('accepts a buffer that starts with %PDF-', () => {
+    expect(isPdfMagic(Buffer.from('%PDF-1.7\n'))).toBe(true);
+  });
+
+  it('rejects a buffer that does not', () => {
+    expect(isPdfMagic(Buffer.from('PK\x03\x04'))).toBe(false);
+    expect(isPdfMagic(Buffer.from('hello'))).toBe(false);
+    expect(isPdfMagic(Buffer.from('%PDX-'))).toBe(false);
+  });
+
+  it('rejects a buffer shorter than 5 bytes', () => {
+    expect(isPdfMagic(Buffer.from('%PDF'))).toBe(false);
+    expect(isPdfMagic(Buffer.alloc(0))).toBe(false);
+  });
+});
+
+describe('parseFeetInches', () => {
+  it('parses ft-in', () => {
+    expect(parseFeetInches(`206' 8"`)).toBeCloseTo(206 + 8 / 12, 5);
+  });
+  it('parses ft-only', () => {
+    expect(parseFeetInches('82')).toBe(82);
+    expect(parseFeetInches('82.5')).toBe(82.5);
+  });
+  it('returns null for garbage', () => {
+    expect(parseFeetInches('hello')).toBeNull();
+  });
+});
+
+describe('parseHumanDate', () => {
+  it('parses ordinal-suffixed dates', () => {
+    expect(parseHumanDate('September 15th 2025')).toBe('2025-09-15');
+  });
+  it('returns null for unparsable', () => {
+    expect(parseHumanDate('not a date')).toBeNull();
+  });
+});
+
+describe('extractFromOcrText — sample berth A1', () => {
+  // Mirrors the layout of Berth_Spec_Sheet_A1.pdf documented in plan §9.2.
+  const sample = `
+PORT NIMARA
+ANGUILLA
+
+BERTH NUMBER
+
+A1   200'
+
+Length: 206' 8" / 63m
+Width: 46' 7" / 14.2m
+Water Depth: 16' 1" / 4.9m
+
+Bow Facing: East
+Pontoon: QUAY PT
+Power Capacity: 330 kW
+Voltage at 60 Hz: 480 V
+Max. draught of vessel: 14' 6" / 4.4m
+
+PURCHASE PRICE:
+FEE SIMPLE OR STRATA LOT
+3,880,800 USD
+
+WEEK HIGH / LOW: 11,341 USD / 8,100 USD
+DAY HIGH / LOW: 1,890 USD / 1,350 USD
+
+ALL PRICES ABOVE ARE CONFIRMED THROUGH UNTIL SEPTEMBER 15TH, 2025
+
+Mooring Type: Side Pier / Med Mooring
+Cleat Type: A5
+Cleat Capacity: 20-24 ton break load
+Bollard Type: Bull bollard type B
+Bollard Capacity: 40 ton break load
+Access: Car to Vessel (max. 3 ton)
+`;
+
+  const { fields, warnings } = extractFromOcrText(sample);
+
+  it('extracts the mooring number', () => {
+    expect(fields.mooringNumber?.value).toBe('A1');
+  });
+
+  it('extracts dimensional pairs', () => {
+    expect(fields.lengthFt?.value).toBeCloseTo(206 + 8 / 12, 1);
+    expect(fields.lengthM?.value).toBe(63);
+    expect(fields.widthFt?.value).toBeCloseTo(46 + 7 / 12, 1);
+    expect(fields.widthM?.value).toBe(14.2);
+    expect(fields.waterDepth?.value).toBeCloseTo(16 + 1 / 12, 1);
+    expect(fields.waterDepthM?.value).toBe(4.9);
+    expect(fields.draftFt?.value).toBeCloseTo(14 + 6 / 12, 1);
+    expect(fields.draftM?.value).toBe(4.4);
+  });
+
+  it('extracts power + voltage', () => {
+    expect(fields.powerCapacity?.value).toBe(330);
+    expect(fields.voltage?.value).toBe(480);
+  });
+
+  it('extracts pricing block', () => {
+    expect(fields.weeklyRateHighUsd?.value).toBe(11341);
+    expect(fields.weeklyRateLowUsd?.value).toBe(8100);
+    expect(fields.dailyRateHighUsd?.value).toBe(1890);
+    expect(fields.dailyRateLowUsd?.value).toBe(1350);
+    expect(fields.price?.value).toBe(3880800);
+  });
+
+  it('extracts pricing-validity date', () => {
+    expect(fields.pricingValidUntil?.value).toBe('2025-09-15');
+  });
+
+  it('extracts access + mooring + cleat + bollard text fields', () => {
+    expect(fields.bowFacing?.value).toBe('East');
+    expect(fields.sidePontoon?.value).toBe('QUAY PT');
+    expect(fields.mooringType?.value).toContain('Side Pier');
+    expect(fields.cleatType?.value).toBe('A5');
+    expect(fields.cleatCapacity?.value).toContain('20-24 ton');
+    expect(fields.bollardType?.value).toContain('Bull bollard');
+    expect(fields.access?.value).toContain('Car to Vessel');
+  });
+
+  it('does not warn when imperial/metric agree within 1%', () => {
+    expect(warnings).not.toEqual(expect.arrayContaining([expect.stringContaining('mismatch')]));
+  });
+});
+
+describe('extractFromOcrText — imperial/metric drift warning', () => {
+  it('flags a >1% mismatch', () => {
+    const { warnings } = extractFromOcrText('Length: 100 ft / 50m');
+    expect(warnings.some((w) => /mismatch/i.test(w))).toBe(true);
+  });
+});
+
+describe('shouldOfferAiTier', () => {
+  it('returns false for AcroForm parses', () => {
+    expect(
+      shouldOfferAiTier({
+        engine: 'acroform',
+        fields: { mooringNumber: { value: 'A1', confidence: 1, engine: 'acroform' } },
+        meanConfidence: 1,
+        warnings: [],
+      }),
+    ).toBe(false);
+  });
+
+  it('returns true when OCR found nothing', () => {
+    expect(shouldOfferAiTier({ engine: 'ocr', fields: {}, meanConfidence: 0, warnings: [] })).toBe(
+      true,
+    );
+  });
+
+  it('returns true when mean confidence dips below threshold', () => {
+    expect(
+      shouldOfferAiTier({
+        engine: 'ocr',
+        fields: { mooringNumber: { value: 'A1', confidence: 0.3, engine: 'ocr' } },
+        meanConfidence: 0.3,
+        warnings: [],
+      }),
+    ).toBe(true);
+  });
+
+  it('returns false when OCR is confident', () => {
+    expect(
+      shouldOfferAiTier({
+        engine: 'ocr',
+        fields: { mooringNumber: { value: 'A1', confidence: 0.9, engine: 'ocr' } },
+        meanConfidence: 0.9,
+        warnings: [],
+      }),
+    ).toBe(false);
+  });
+});