docs(05-05): complete End-to-End Workflow Tests plan

Tasks completed: 2/2
- Task 1: Billing workflow end-to-end test
- Task 2: Collection and ticket workflow end-to-end tests

SUMMARY: .planning/phases/05-visibility-and-client-portal/05-05-SUMMARY.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/phases/05-visibility-and-client-portal/05-05-SUMMARY.md

@@ -0,0 +1,112 @@
+---
+phase: 05-visibility-and-client-portal
+plan: 05
+subsystem: testing
+tags: [e2e, integration, billing, collection, remittance, ticket, job-order, dashboard, trial-balance]
+
+# Dependency graph
+requires:
+  - phase: 05-01
+    provides: Dashboard metric aggregation service
+  - phase: 05-02
+    provides: Portal auth for subscriber identification
+  - phase: 05-03
+    provides: Ticket submission and comment threads
+  - phase: 02-03
+    provides: Subscriber service (createSubscriber)
+  - phase: 02-04
+    provides: Billing service (generateInvoiceForSubscriber)
+  - phase: 02-05
+    provides: Payment service (recordPayment with FIFO allocation)
+  - phase: 03-01
+    provides: Collector service (recordCollection with zone enforcement)
+  - phase: 03-02
+    provides: Remittance service (createRemittance, verifyRemittance)
+  - phase: 03-03
+    provides: Ticket service (createTicket, transitionTicketStatus)
+  - phase: 03-04
+    provides: Job order service (createJobOrder, updateJobOrderStatus)
+provides:
+  - End-to-end workflow tests proving system coherence (INFRA-04)
+  - Self-verifying accounting (trial balance balanced after every workflow)
+  - Dashboard metric validation from real workflow data
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Sequential e2e test pattern: describe blocks with numbered tests that share state"
+    - "Comprehensive cleanup order covering all 25+ models in correct FK dependency order"
+
+key-files:
+  created:
+    - src/lib/__tests__/integration/e2e-workflows.test.ts
+  modified: []
+
+key-decisions:
+  - "E2E tests use service functions directly (not HTTP) to test integration layer"
+  - "Tests share state via describe-scoped variables (sequential story pattern)"
+  - "Comprehensive cleanup order handles all subsystems in single afterAll"
+
+patterns-established:
+  - "Integration test directory: src/lib/__tests__/integration/ for cross-service tests"
+
+# Metrics
+duration: 3min
+completed: 2026-03-05
+---
+
+# Phase 5 Plan 5: End-to-End Workflow Tests Summary
+
+**16 e2e tests proving billing, collection/remittance, and ticket/job-order workflows integrate correctly with balanced accounting entries and dashboard metrics**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-03-05T09:39:35Z
+- **Completed:** 2026-03-05T09:42:20Z
+- **Tasks:** 2
+- **Files created:** 1
+
+## Accomplishments
+- Billing workflow proven end-to-end: subscriber registration -> invoice generation -> full/partial payment -> balanced trial balance -> dashboard reflects
+- Collection/remittance workflow proven: field collection with FIFO allocation -> remittance submission -> office verification -> balanced JEs -> dashboard metrics
+- Ticket/job-order workflow proven: ticket creation -> job order assignment -> technician completion -> auto-resolve -> staff close
+- Trial balance verified balanced (debits === credits) after every workflow
+- Dashboard metrics validated against real workflow data (revenue, subscribers, collections)
+- INFRA-04 requirement satisfied: system works as a coherent whole
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Billing workflow end-to-end test** - `abf9ee0` (feat)
+2. **Task 2: Collection and ticket workflow end-to-end tests** - `2482427` (feat)
+
+## Files Created/Modified
+- `src/lib/__tests__/integration/e2e-workflows.test.ts` - 685 lines, 16 tests across 3 critical business workflows
+
+## Decisions Made
+- E2E tests use service functions directly (not HTTP calls) to test the service integration layer
+- Collection workflow creates raw invoices via helper (not billing service) to avoid coupling to billing cycle timing
+- Shared beforeAll setup creates tenant, COA, users, zone, plan once for all three workflows
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None.
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- All three critical ISP workflows proven to work end-to-end
+- Accounting integrity verified (self-balancing books)
+- Ready for 05-04 (if remaining) or phase completion
+
+---
+*Phase: 05-visibility-and-client-portal*
+*Completed: 2026-03-05*