v1.13.2 — audit round 3: fixes + buildDevices test suite

• buildDevices finally has a direct unit-test suite (12 tests on a fake hass):
  area filtering, curation incl. show-all, duplicate numbering, light-group folding
  and its group_lights=false inverse, marker claim/metadata/hidden/virtual/entity
  paths, custom icon rules + the deliberate lock override, device_class fallback,
  primary-entity priority, LQI/temperature extraction. Frontend tests: 28 → 41.
• Fix: t() now substitutes every occurrence of a placeholder (extracted as the
  pure subst() helper with a regression test).
• Fix: _saveConfigNow refreshes the local config on a rev conflict before
  rethrowing — a retry no longer hits the same conflict (the debounced path already
  did this; the immediate path did not).
• Fix: pointercancel on a device icon clears the long-press timer — no phantom
  info card after an aborted touch gesture.
• Repairs check moved to repairs.py and now re-runs after every config save,
  so a missing/restored plan file is reflected in the Repairs UI without a restart.
• Documented the deliberate mdi:lock override in devices.ts (wins over custom
  rules — a mislabeled lock icon is safety-relevant confusion).
• Test infra: tsconfig.test.json also compiles devices.ts/types.ts;
  scripts/fix-test-build.mjs appends .js to tsc's extensionless ESM imports.