feat(domain): Domain\Authors + Domain\Newsletter repositories z wrapper delegation

Phase 4 complete:
- AuthorsRepository: simpleList, authorDetails, authorSave, authorDelete, authorByLang
- NewsletterRepository: 14 methods — subscriber lifecycle, templates, sending
- 4 legacy factories converted to thin wrappers
- Globals ($settings, $lang) passed as explicit params to repo methods

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.paul/STATE.md

@@ -5,18 +5,18 @@
 See: .paul/PROJECT.md (updated 2026-04-04)
 
 **Core value:** Autorski system CMS umożliwiający zarządzanie treściami i stronami internetowymi.
-**Current focus:** Phase 3 complete — ready for Phase 4
+**Current focus:** Phase 4 complete — ready for Phase 5
 
 ## Current Position
 
 Milestone: v0.1 Refaktoryzacja
-Phase: 3 of 19 (Domain: Scontainers + Banners) — Complete
-Plan: 03-01 complete
+Phase: 4 of 19 (Domain: Authors + Newsletter) — Complete
+Plan: 04-01 complete
 Status: Loop closed, ready for next PLAN
-Last activity: 2026-04-04 — Phase 3 complete, UNIFY done
+Last activity: 2026-04-04 — Phase 4 complete, UNIFY done
 
 Progress:
-- Milestone: [▓▓░░░░░░░░] 15%
+- Milestone: [▓▓░░░░░░░░] 20%
 
 ## Loop Position
 
@@ -29,8 +29,8 @@ PLAN ──▶ APPLY ──▶ UNIFY
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 3
-- Total execution time: ~20min
+- Total plans completed: 4
+- Total execution time: ~22min
 
 **By Phase:**
 
@@ -39,6 +39,7 @@ PLAN ──▶ APPLY ──▶ UNIFY
 | 01-infrastructure | 1/1 | ~10min | ~10min |
 | 02-shared-email-security | 1/1 | ~8min | ~8min |
 | 03-domain-scontainers-banners | 1/1 | ~2min | ~2min |
+| 04-domain-authors-newsletter | 1/1 | ~2min | ~2min |
 
 ## Accumulated Context
 
@@ -50,6 +51,7 @@ PLAN ──▶ APPLY ──▶ UNIFY
 - Wrapper delegation: factory creates new repo per call (no singleton)
 - Front repos: $lang[0] passed explicitly, repos don't use globals
 - Front caching: migrated from \Cache:: to \Shared\Cache\CacheHandler::
+- Newsletter: globals ($settings, $lang) passed as explicit params to repo methods
 
 ### Deferred Issues
 None.
@@ -60,9 +62,9 @@ None.
 ## Session Continuity
 
 Last session: 2026-04-04
-Stopped at: Phase 3 complete, loop closed
-Next action: Run /paul:plan for Phase 4 (Domain: Authors + Newsletter)
-Resume file: .paul/phases/03-domain-scontainers-banners/03-01-SUMMARY.md
+Stopped at: Phase 4 complete, loop closed
+Next action: Run /paul:plan for Phase 5 (Domain: SeoAdditional + Cron + Releases)
+Resume file: .paul/phases/04-domain-authors-newsletter/04-01-SUMMARY.md
 
 ---
 *STATE.md — Updated after every significant action*