docs(openspec): propose 8 tigshop migration changes (P0-P7) + migration plan

2026-09-23 13:30:36 +08:00
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+## ADDED Requirements
+
+### Requirement: Shop-scoped aftersale workspace
+Shop-admin SHALL provide an aftersale list and detail workspace filtered to the authenticated shop's `own_shop` resources. Authorized shop users SHALL inspect order-item evidence and messages, approve or reject pending applications, and confirm returned goods with the guarded refund action. The UI SHALL show status transitions, remaining amount, ledger-backed refund result, and stale-action errors through the shared API contract.
+
+#### Scenario: merchant approves a request
+- **WHEN** a shop user opens a pending application for an item belonging to their shop and approves it
+- **THEN** the status advances according to the selected aftersale type and the customer can see the persisted result
+
+#### Scenario: merchant confirms return and refunds
+- **WHEN** a shop user confirms receipt of a buyer-shipped return
+- **THEN** the service records merchant confirmation, credits the customer's account once, and displays the refunded status and order total
+
+#### Scenario: shop scope is enforced
+- **WHEN** a shop user requests or mutates an aftersale for another shop
+- **THEN** the API denies the operation and the workspace exposes no cross-shop data
+
+#### Scenario: merchant messages buyer
+- **WHEN** an authorized shop user appends a localized message
+- **THEN** the message appears in the same chronological aftersale thread visible to the buyer