docs(04-01): complete adminService monitoring extensions and frontend components plan

- SUMMARY.md created for 04-01
- STATE.md updated to Phase 4 Plan 2, decisions logged
- ROADMAP.md progress updated for phase 4 (1/2 summaries)
- REQUIREMENTS.md: ALRT-03 marked complete

.planning/STATE.md

@@ -5,16 +5,16 @@
 See: .planning/PROJECT.md (updated 2026-02-24)
 
 **Core value:** When something breaks — an API key expires, a service goes down, a credential needs reauthorization — the admin knows immediately and knows exactly what to fix.
-**Current focus:** Phase 3 — API Layer
+**Current focus:** Phase 4 — Frontend
 
 ## Current Position
 
-Phase: 3 of 4 (API Layer)
-Plan: 2 of 4 in current phase
+Phase: 4 of 4 (Frontend)
+Plan: 2 of 2 in current phase
 Status: In Progress
-Last activity: 2026-02-24 — Completed 03-02 (analytics instrumentation in processJob)
+Last activity: 2026-02-24 — Completed 04-01 (adminService monitoring methods, AlertBanner, AdminMonitoringDashboard)
 
-Progress: [███████░░░] 70%
+Progress: [█████████░] 90%
 
 ## Performance Metrics
 
@@ -36,6 +36,7 @@ Progress: [███████░░░] 70%
 
 *Updated after each plan completion*
 | Phase 03-api-layer P01 | 8 | 2 tasks | 4 files |
+| Phase 04-frontend P01 | 2 | 2 tasks | 3 files |
 
 ## Accumulated Context
 
@@ -71,6 +72,9 @@ Recent decisions affecting current work:
 - [Phase 03-api-layer]: requireAdminEmail returns 404 not 403 — does not reveal admin routes exist
 - [Phase 03-api-layer]: getPostgresPool() used for aggregate SQL — Supabase JS client does not support COUNT/AVG
 - [Phase 03-api-layer]: Admin env vars read inside function body not module level — Firebase Secrets timing constraint
+- [Phase 04-frontend]: AlertBanner filters to active service_down/service_degraded only — recovery type is informational, not critical
+- [Phase 04-frontend]: AlertEvent uses snake_case (backend raw model), ServiceHealthEntry/AnalyticsSummary use camelCase (backend admin.ts remaps)
+- [Phase 04-frontend]: AdminMonitoringDashboard is self-contained with no required props
 
 ### Pending Todos
 
@@ -84,5 +88,5 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-02-24
-Stopped at: Completed 03-01-PLAN.md — admin API endpoints (GET /health, GET /analytics, GET /alerts, POST /alerts/:id/acknowledge) with requireAdminEmail middleware.
+Stopped at: Completed 04-01-PLAN.md — adminService monitoring methods (getHealth, getAnalytics, getAlerts, acknowledgeAlert), AlertBanner component, AdminMonitoringDashboard component.
 Resume file: None