feat(search-by-product): extend order search to include product names

Added EXISTS subquery on order_items.original_name to the search filter
in OrdersRepository::buildPaginateFilters(). Users can now find orders
by typing a product name in the search field. Updated search placeholder
to reflect the new capability.

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

.paul/STATE.md

@@ -5,19 +5,19 @@
 See: .paul/PROJECT.md (updated 2026-04-07)
 
 **Core value:** Sprzedawca moze obslugiwac zamowienia ze wszystkich kanalow sprzedazy i nadawac przesylki bez przelaczania sie miedzy platformami.
-**Current focus:** Milestone v3.0 - Phase 72 complete, ready for next PLAN
+**Current focus:** Milestone v3.0 - Phase 73 complete, ready for next PLAN
 
 ## Current Position
 
 Milestone: v3.0 Mobile Responsive - In progress
-Phase: 72 (Per Page Persistence) — Complete
-Plan: 72-01 unified
+Phase: 73 (Search by Product) — Complete
+Plan: 73-01 unified
 Status: Loop complete, ready for next PLAN
-Last activity: 2026-04-07 — Unified .paul/phases/72-per-page-persistence/72-01-PLAN.md
+Last activity: 2026-04-07 — Unified .paul/phases/73-search-by-product/73-01-PLAN.md
 
 Progress:
-- Milestone: [########..] ~75%
-- Phase 72: [##########] 100%
+- Milestone: [########..] ~76%
+- Phase 73: [##########] 100%
 
 ## Loop Position
 
@@ -30,11 +30,11 @@ PLAN --> APPLY --> UNIFY
 ## Session Continuity
 
 Last session: 2026-04-07
-Stopped at: Plan 72-01 unified
+Stopped at: Plan 73-01 unified
 Next action: Run /paul:plan for the next prioritized phase
-Resume file: .paul/phases/72-per-page-persistence/72-01-SUMMARY.md
+Resume file: .paul/phases/73-search-by-product/73-01-SUMMARY.md
 
 ## Git State
 
-Last commit: 6d0905d
+Last commit: 24df01c
 Branch: main