Add StoreKit history and modernize admin console

Expose ledger-backed cross-device purchase history while shipping the tested React admin redesign in the same reproducible deployment revision.

docs/openapi.yaml

@@ -177,6 +177,28 @@ paths:
                 items: { $ref: "#/components/schemas/StoreKitProduct" }
         default: { $ref: "#/components/responses/Error" }
   /v1/storekit/transactions:
+    get:
+      summary: Return credited StoreKit purchase history for the current account
+      description: |
+        Returns only App Store transactions that were previously verified and
+        committed with their immutable credit-ledger entries. Results include
+        purchases credited before this endpoint was introduced and never call
+        the App Store at query time. The opaque cursor follows the stable
+        descending order of `purchasedAt` and `transactionId`.
+      parameters:
+        - $ref: "#/components/parameters/Limit"
+        - name: cursor
+          in: query
+          description: Opaque cursor returned by the preceding page.
+          schema: { type: string, minLength: 1, maxLength: 256 }
+      responses:
+        "200":
+          description: Credited StoreKit purchases for the authenticated account
+          content:
+            application/json:
+              schema: { $ref: "#/components/schemas/StoreKitTransactionHistory" }
+        "400": { $ref: "#/components/responses/Error" }
+        default: { $ref: "#/components/responses/Error" }
     post:
       summary: Verify an App Store transaction and idempotently grant credits
       description: |
@@ -1306,6 +1328,29 @@ components:
         creditsGranted: { type: integer, format: int64, minimum: 1 }
         balanceAfter: { type: integer, format: int64, minimum: 0 }
         replayed: { type: boolean }
+    StoreKitTransactionHistoryItem:
+      type: object
+      additionalProperties: false
+      required:
+        [transactionId, productId, creditsGranted, balanceAfter, purchasedAt, status]
+      properties:
+        transactionId: { type: string, pattern: "^[0-9]{1,64}$" }
+        productId: { type: string, minLength: 3, maxLength: 128 }
+        creditsGranted: { type: integer, format: int64, minimum: 1 }
+        balanceAfter: { type: integer, format: int64, minimum: 0 }
+        purchasedAt: { type: string, format: date-time }
+        status: { type: string, enum: [credited] }
+    StoreKitTransactionHistory:
+      type: object
+      additionalProperties: false
+      required: [items, nextCursor]
+      properties:
+        items:
+          type: array
+          items: { $ref: "#/components/schemas/StoreKitTransactionHistoryItem" }
+        nextCursor:
+          type: ["string", "null"]
+          maxLength: 256
     AppleAppSiteAssociation:
       type: object
       additionalProperties: false