docs(18-03): record plan 03 progress in STATE and ROADMAP

.planning/STATE.md

@@ -4,16 +4,16 @@ milestone: v1.0
 current_phase: 18
 current_phase_name: Payment Gateway
 status: executing
-stopped_at: Completed 18-02-PLAN.md
-last_updated: "2026-10-13T11:20:09.050Z"
+stopped_at: Completed 18-03-PLAN.md
+last_updated: "2026-10-13T12:01:32.730Z"
 last_activity: 2026-10-13
 last_activity_desc: Phase 18 execution started
-state_head: a22bd8a934f9b91820e75a95ce0b8a71a2c460b1
+state_head: 9b193c1c4ca13710b55901df39ca2467a4f0199c
 progress:
   total_phases: 40
   completed_phases: 14
   total_plans: 175
-  completed_plans: 170
+  completed_plans: 171
 gsd_state_version: "1.0"
 milestone_name: milestone
 ---
@@ -30,7 +30,7 @@ See: .planning/PROJECT.md (updated 2026-10-12)
 ## Current Position
 
 Phase: 18 (Payment Gateway) — EXECUTING
-Plan: 3 of 7
+Plan: 4 of 7
 Status: Ready to execute
 Last activity: 2026-10-13 — Phase 18 execution started
 
@@ -227,6 +227,7 @@ Progress: [████░░░░░░] 44%
 | Phase 17 P06 | 53 min | 4 tasks | 50 files |
 | Phase 18 P01 | 43min | 4 tasks | 59 files |
 | Phase 18 P02 | 75min | 4 tasks | 84 files |
+| Phase 18 P03 | 45min | 3 tasks | 75 files |
 
 ## Accumulated Context
 
@@ -751,6 +752,9 @@ Recent decisions affecting current work:
 - [Phase 18]: 18-02: cart/details v2 row format is v2-research (long keys, top-level v:2); legacy JMS rows decoded in place, never rewritten
 - [Phase 18]: 18-02: notification route verifies (VerifyNotification on the capped raw body) before any database lookup; operators.PaymentContext carries Tx for in-transaction transitions
 - [Phase 18]: 18-02: NBP uses Table A of the day before with a 5-day fallback (PHP semantics); Fixer keeps the PHP endpoint with optional fixer_access_key
+- [Phase 18]: Admin amounts use money.Stored (struct around Amount4) because cabana money fields/columns accept only string or struct Scanner/Valuer columns
+- [Phase 18]: Quote cart widget runs one cabana action (quote_cart) with payload operations; refusals answer 403 ForbiddenError so the admin toasts the localized reason
+- [Phase 18]: Paymentgateway admin copy is complete in lang/{en,pl}; plan 04 settings/mailer keys listed in 18-03-SUMMARY
 
 ### Pending Todos
 
@@ -829,6 +833,6 @@ Items acknowledged and carried forward from previous milestone close:
 
 ## Session Continuity
 
-Last session: 2026-10-13T11:20:08.174Z
-Stopped at: Completed 18-02-PLAN.md
+Last session: 2026-10-13T12:01:31.874Z
+Stopped at: Completed 18-03-PLAN.md
 Resume file: None