docs: define organization account model

docs/TASKS/approval-workflow/008-content-detail-approval-stepper.md

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+# Task: Extract content detail approval stepper
+
+## Feature
+
+`docs/FEATURES/approval-workflow.md`
+
+## Goal
+
+Move the approval area in `ContentItemDetailView` into a small feature-owned component that can show approval requests and multi-level workflow steps as a vertical stepper.
+
+## Scope
+
+- Extract the approval panel from `frontend/src/features/content/views/ContentItemDetailView.vue`.
+- Render approval requests or workflow steps as circles in a vertical column connected by a dashed line.
+- Show approval state, expected approver, due date, and recorded decisions in a hover/focus popup.
+- Remove manual approval request creation from the content detail UI and backend API.
+- Record the single documented v1 approval decision directly as `Approved`; approval discussion belongs in the content comments thread.
+- Align the backend submit-decision request so approval comments are not accepted on new decisions.
+- Remove temporary test text from content views.
+
+## Validation Commands
+
+```bash
+dotnet build backend/Socialize.slnx
+dotnet test backend/Socialize.slnx
+cd frontend && npm run build
+```