v1.6.0 — quality hardening + targeted stability fixes

Historical note (2026-07-15): This release was rewritten with
git filter-repo on 2026-07-15 to remove a set of Spwig HQ-internal
apps (developer_portal/, license_checkout/, marketplace_checkout/,
and four companion files in accounts/) that shipped in the OSS
distribution by mistake, starting with v1.5.7. Runtime behavior for
Community installs is unchanged — the removed code was gated behind
SPWIG_IS_HQ and never activated on Community builds. The v1.6.0
tag now points at the rewritten commit; older releases (v1.5.7,
v1.5.8, v1.5.9) were similarly rewritten.

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A quality-hardening release. Continuous integration now enforces
formatting, linting, and typing across the codebase, and a batch of
targeted stability improvements ship alongside.

Fixed

• Address updates on the customer profile no longer surface an error
  under specific data shapes.
• POS manager admin now filters on the correct hashed credential.
• Product admin search restored on catalogs that store the
  description field outside the primary record.
• Order statistics computation is now robust against multi-currency
  amounts.
• Email unsubscribe footer no longer duplicates when the sending
  template already contains one.
• Affiliate program email templates are now discoverable through the
  admin template registry.
• Smart-defaults service correctly resolves order fields on the
  current schema.
• Guest activation and email-unsubscribe redirects now resolve to
  the storefront home.
• Site settings change form: four inline style attributes moved to
  CSS, restoring strict-CSP compliance.
• Page-builder structure view now stays in sync when the wrapper is
  clicked.
• Broader import correctness across page builder, catalog, email
  system, and orders admin code paths.

Changed

• Ruff format and prettier are now the enforced source-formatting
  standards; CI blocks on any drift.
• ESLint runs codebase-wide with strict enforcement and blocks CI
  on regressions.
• Contributors get instant local feedback via a .pre-commit-config.yaml
  in the repo — pre-commit install once, then formatting and
  linting apply on every commit.
• Unused import cleanup across the codebase reduces cognitive load
  during code review and speeds up cold Django startup marginally.

Tests

• Substantially expanded integration test coverage — new suites for
  preferences, custom fields, referrals, shipping, orders returns,
  and admin push notifications.
• End-to-end (Playwright) tests now run in a dedicated CI track,
  isolated from the unit / integration cluster.
• A dedicated CI step exercises 13 audited app-level test suites in
  addition to the main test run.

Contributors

• CONTRIBUTING.md now documents the Developer Certificate of Origin
  (DCO) sign-off requirement — please git commit -s your changes.

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Full changelog: CHANGELOG.md