docs(03-04): mark plan complete after human-verify approval

.planning/phases/03-operator-experience/03-04-SUMMARY.md

@@ -77,7 +77,7 @@ completed: 2026-03-23
 - **Duration:** ~10 min
 - **Started:** 2026-03-23T21:39:11Z
 - **Completed:** 2026-03-23T21:49:00Z
-- **Tasks:** 1 of 1 auto tasks complete (Task 2 is human-verify checkpoint)
+- **Tasks:** 2 of 2 complete (Task 1 auto + Task 2 human-verify approved)
 - **Files modified:** 8
 
 ## Accomplishments
@@ -136,10 +136,21 @@ Each task was committed atomically:
 None — no external service configuration required for this plan.
 
 ## Next Phase Readiness
-- Cost tracking dashboard complete and building
+- Cost tracking dashboard complete, verified by operator, and building
-- Ready for Task 2 (human visual verification checkpoint)
+- Phase 3 (Operator Experience) all 4 plans complete
 - No blockers
 
 ---
 *Phase: 03-operator-experience*
 *Completed: 2026-03-23*
+
+## Self-Check: PASSED
+
+- FOUND: packages/portal/components/budget-alert-badge.tsx
+- FOUND: packages/portal/components/usage-chart.tsx
+- FOUND: packages/portal/components/provider-cost-chart.tsx
+- FOUND: packages/portal/components/message-volume-chart.tsx
+- FOUND: packages/portal/app/(dashboard)/usage/page.tsx
+- FOUND: packages/portal/app/(dashboard)/usage/[tenantId]/page.tsx
+- FOUND: b73f6bf (docs(03-04): complete usage & cost dashboard plan)
+- Portal build: PASSED (14 routes, /usage and /usage/[tenantId] present)