Re-architect iOS XCUITest suite: per-test isolation + domain organization

Migrate the XCUITest suite off the legacy shared-account model (and the
prior Django-style auth assumptions) to a parallel-safe, domain-organized
architecture, validated end-to-end against the live Kratos stack.

Isolation (parallel-safe by construction):
- Core/Fixtures/TestAccount.swift: each test mints its own pre-verified
  Kratos identity (uit_<domain>_<uuid>@test.honeydue.local), logs in, seeds
  under its own token, and deletes the identity in teardown (cascading all
  data + clearing Kratos). No shared testuser; parallel workers no longer race.
- AuthenticatedUITestCase rewritten to that model (member surface preserved);
  adds requiresResidence / seedAccountPreconditions to seed UI-gated data
  BEFORE login (a fresh account is empty at login).

Organization (255 tests preserved, none dropped):
- 21 domain suites under Auth/ Onboarding/ Residence/ Task/ Contractor/
  Document/ Sharing/ Navigation/ Smoke/ CrossCutting/ E2E/, consistent
  <Domain>UITests naming. Removes the Suite1..11 / AAA_ / ZZ_ / Tests/Rebuild
  naming chaos and the overlapping task/residence/auth suites.

Runner + test plans:
- run_ui_tests.sh: Smoke gate -> Seed -> Parallel(8 workers) -> Sweep. The
  parallel phase runs the whole target minus phase-managed suites via
  -skip-testing, so new suites auto-include (no hand-maintained list to drift).
  Drops the 2-worker cap and Suite6 isolation (isolation made them moot).
- HoneyDueUITests.xctestplan skips the 4 phase-managed suites; adds Smoke.xctestplan.

Kratos auth fixes folded in (login/verify/reset endpoints removed under Kratos):
real Mailpit verification codes replace the obsolete fixed "123456"; teardown
deletes Kratos identities; admin-panel login uses the correct seeded password.

Build green; isolation, parallelism, and the precondition/sharing migrations
validated against the live stack (0 leaked accounts).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

iosApp/HoneyDueUITests.xctestplan

@@ -20,6 +20,12 @@
   "testTargets" : [
     {
       "parallelizable" : true,
+      "skippedTests" : [
+        "AAA_SeedTests",
+        "AppLaunchUITests",
+        "SmokeUITests",
+        "SuiteZZ_CleanupTests"
+      ],
       "target" : {
         "containerPath" : "container:honeyDue.xcodeproj",
         "identifier" : "1CBF1BEC2ECD9768001BF56C",