feat(per-page-persistence): remember selected rows per page in localStorage

table-list component now saves per_page selection to localStorage and
restores it when navigating back to any list without explicit per_page
in URL. URL parameter takes priority over stored value to ensure
bookmarked links work predictably.

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

.paul/phases/72-per-page-persistence/72-01-SUMMARY.md

@@ -0,0 +1,94 @@
+---
+phase: 72-per-page-persistence
+plan: 01
+subsystem: ui
+tags: [localStorage, pagination, table-list, UX]
+
+requires: []
+provides:
+  - Per page persistence via localStorage for all table-list instances
+affects: []
+
+tech-stack:
+  added: []
+  patterns: [per-page localStorage key in table-list component]
+
+key-files:
+  created: []
+  modified: [resources/views/components/table-list.php]
+
+key-decisions:
+  - "Dedykowany klucz per_page zamiast polegania na query restore"
+  - "URL per_page ma priorytet nad localStorage — sync a nie override"
+
+patterns-established:
+  - "perPageKey = storagePrefix + '_per_page' — nowy klucz w rodzinie tableList_ storage"
+
+duration: 5min
+started: 2026-04-07T12:20:00Z
+completed: 2026-04-07T12:25:00Z
+---
+
+# Phase 72 Plan 01: Per Page Persistence Summary
+
+**Zapamiętywanie wybranej liczby wierszy w localStorage — per_page persist dla wszystkich list table-list.**
+
+## Performance
+
+| Metric | Value |
+|--------|-------|
+| Duration | ~5min |
+| Tasks | 1 completed |
+| Files modified | 1 |
+
+## Acceptance Criteria Results
+
+| Criterion | Status | Notes |
+|-----------|--------|-------|
+| AC-1: Zapis per_page do localStorage | Pass | writeJson przy change + sync z URL |
+| AC-2: Odczyt per_page z localStorage | Pass | Auto-submit gdy brak per_page w URL |
+| AC-3: URL ma priorytet nad localStorage | Pass | urlParams.has('per_page') → sync only |
+| AC-4: Brak pętli przeładowań | Pass | Po submit URL zawiera per_page → brak ponownego submit |
+
+## Accomplishments
+
+- Dodano `perPageKey` do rodziny kluczy localStorage w table-list.php
+- Zapis przy zmianie selecta per_page (przed submit)
+- Odczyt i auto-redirect przy wejściu bez per_page w URL
+- Sync localStorage z URL gdy per_page jawnie podane
+
+## Files Created/Modified
+
+| File | Change | Purpose |
+|------|--------|---------|
+| `resources/views/components/table-list.php` | Modified | perPageKey + save/restore logic |
+
+## Decisions Made
+
+| Decision | Rationale | Impact |
+|----------|-----------|--------|
+| Dedykowany klucz per_page | Query restore przywraca caly URL (status, page, search) — per_page powinien byc niezalezny | Mozna zmienic per_page bez resetowania filtrow |
+| URL ma priorytet | Jawny link z per_page=20 powinien dzialac przewidywalnie | Brak niespodzianek przy linkach bookmarkowanych |
+
+## Deviations from Plan
+
+None — plan executed exactly as written
+
+## Issues Encountered
+
+None
+
+## Next Phase Readiness
+
+**Ready:**
+- Wszystkie listy table-list automatycznie korzystaja z persistence per_page
+
+**Concerns:**
+- None
+
+**Blockers:**
+- None
+
+---
+*Phase: 72-per-page-persistence, Plan: 01*
+*Completed: 2026-04-07*