docs(09-02): complete etape management plan

.planning/phases/09-etapes/09-02-SUMMARY.md

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+---
+phase: 09-etapes
+plan: 02
+subsystem: tasks
+tags: [go, htmx, templ, etapes]
+requires:
+  - phase: 09-etapes
+    plan: 01
+    provides: etape schema, queries, strip, and task filtering
+provides:
+  - etape edit, delete, and reorder handlers
+  - delete confirmation explaining tasks move to Unassigned
+  - compact chip management controls
+affects: [09-etapes, tasks]
+tech-stack:
+  added: []
+  patterns: [full tasks-tab refresh after management mutations, explicit reorder forms]
+key-files:
+  created: []
+  modified:
+    - backend/internal/web/handlers_etapes.go
+    - backend/internal/web/router.go
+    - backend/templates/etapes.templ
+    - backend/templates/etapes_forms.go
+key-decisions:
+  - "Use explicit Up/Down reorder forms instead of adding a second Sortable.js group in this minimal UI."
+  - "Return the full #tasks-tab fragment after edit, delete, and reorder so counts, chips, and kanban stay consistent."
+patterns-established:
+  - "Etape management routes bind both tablo id and etape id before mutation."
+  - "Delete relies on the database foreign key's ON DELETE SET NULL behavior for task unassignment."
+requirements-completed: []
+completed: 2026-05-15
+---
+
+# Plan 09-02 Summary
+
+**Etape edit, delete-unassign, and reorder management from the Tasks tab strip**
+
+## Accomplishments
+
+- Added etape edit, update, delete confirmation, delete, and reorder routes under protected tablo routes.
+- Added compact edit/delete/up/down controls beside etape chips.
+- Added the required delete confirmation copy: `Tasks in this etape will stay in the tablo and move to Unassigned.`
+- Added tests for update, delete-unassign, reorder, and non-owner 404 behavior.
+
+## Task Commits
+
+1. **Task 1: Add RED coverage for etape management** - `9b89282`
+2. **Task 2: Implement edit, delete-unassign, and reorder** - `4af623a`
+
+## Verification
+
+- `cd backend && just generate`
+- `cd backend && go test ./internal/web -run 'TestEtapeUpdateChangesTitleAndDescription|TestEtapeDeleteUnassignsTasks|TestEtapeReorderPersistsPosition|TestEtapeOwnershipReturns404' -count=1 -v`
+- `cd backend && go test ./... -count=1`
+- `git diff --check`
+
+Note: the DB-backed integration tests compile but are skipped locally because `TEST_DATABASE_URL`/`DATABASE_URL` is unset.
+
+## Deviations from Plan
+
+Used explicit Up/Down forms for reorder rather than Sortable.js. This keeps the first management UI minimal and avoids introducing a second drag/drop group.
+
+## Issues Encountered
+
+None.
+
+## User Setup Required
+
+None.
+
+## Next Phase Readiness
+
+Plan 09-03 can focus on richer task assignment selectors and filter behavior using the existing etape list, ownership validation, and full-tab refresh helpers.
+
+## Self-Check: PASSED