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: Merchant settlement statements
+Shop-admin SHALL list and open the signed-in shop's settlement statements — period, amount snapshot, and status — through the shared API contract, and allow manual generation for a closed period of the own shop. Shop-scoped pages SHALL never expose another shop's statements or their order/refund breakdown.
+
+#### Scenario: statements list and detail
+- **WHEN** a merchant opens the settlement page
+- **THEN** only their own shop's statements are listed and each opens into its snapshot breakdown of orders, refunds, commission, and payable amount
+
+#### Scenario: generation is idempotent in the UI
+- **WHEN** the merchant generates a statement for a period that already has one
+- **THEN** the existing statement appears without duplication
+
+### Requirement: Shop-account withdrawal
+The shop owner SHALL view the shop account summary (available and frozen balance of the shop owner's account) and apply to withdraw from it through the shared API contract, seeing the request as pending until the platform reviews it.
+
+#### Scenario: shop-account withdrawal freezes funds
+- **WHEN** the shop owner submits a withdrawal request from the shop-account page
+- **THEN** the summary reflects the frozen amount and the request lists as pending
+
+#### Scenario: reviewed request reflects outcome
+- **WHEN** the platform rejects the shop owner's pending withdrawal
+- **THEN** the shop-account summary shows the amount returned to available balance and the request shows as rejected