Add confirmation status and holdings UI (3d-2c)

Wire the subscription confirmation and positions endpoints into the
frontend: order rows show per-order trade date and confirmed outcome
(NAV, units, NAV date, invested cash, residual) or pending_nav reason,
each confirmable order gets a confirm action posting to the existing
confirm endpoint with an idempotency key and request-sequence guard,
and a new holdings panel renders available/reserved cash plus per-code
positions (units, cost, latest valuation NAV with date, or an explicit
'估值待更新' when no valuation exists).

Orders list/create responses now return the full detail shape so
pending reasons and confirmation results survive refresh. The optional
text decoder accepts the current plain-value/null wire format alongside
the legacy case/fields envelope, restoring fund type and daily return
display. Browser QA gains a J-series covering the real confirm flow,
holdings rendering and cash accounting; Web tests cover decoders,
confirm guard, stale-response protection and token invalidation.

1 files changed, 2 insertions, 28 deletions

diff --git a/src/FundLab.Api/App.fs b/src/FundLab.Api/App.fs
index 839a641..97787aa 100644
--- a/src/FundLab.Api/App.fs
+++ b/src/FundLab.Api/App.fs
@@ -57,19 +57,6 @@ type FundApiResponse =
         status: string
     }
 
-type SubscriptionOrderApiResponse =
-    {
-        id: Guid
-        fundId: Guid
-        fundCode: string
-        amount: string
-        feeAmount: string
-        reservedTotal: string
-        status: string
-        submittedAt: string
-        isSynthetic: bool
-    }
-
 type ConfirmedQuoteEvidenceResponse =
     {
         navDate: string
@@ -198,20 +185,7 @@ module App =
             status = fund.Status
         }
 
-    let private orderResponse (order: SubscriptionOrderRecord) : SubscriptionOrderApiResponse =
-        {
-            id = order.Id
-            fundId = order.FundId
-            fundCode = order.FundCode
-            amount = cashText order.Amount
-            feeAmount = cashText order.FeeAmount
-            reservedTotal = cashText order.ReservedTotal
-            status = order.Status
-            submittedAt = timestampText order.SubmittedAt
-            isSynthetic = order.IsSynthetic
-        }
-
-    let private confirmationResponse (order: SubscriptionOrderRecord) : SubscriptionOrderDetailResponse =
+    let private orderResponse (order: SubscriptionOrderRecord) : SubscriptionOrderDetailResponse =
         let quoteEvidence =
             order.ConfirmedQuote
             |> Option.map (fun quote ->
@@ -461,7 +435,7 @@ module App =
                     match repository.ConfirmSubscriptionOrder(idempotencyKey, fundId, orderId) with
                     | OrderConfirmed order
                     | ConfirmReplayed order
-                    | ConfirmPendingNav order -> json (confirmationResponse order) next ctx
+                    | ConfirmPendingNav order -> json (orderResponse order) next ctx
                     | ConfirmIdempotencyConflict ->
                         errorResponse 409 "IDEMPOTENCY_CONFLICT" "idempotency key was used with a different request" next ctx
                     | ConfirmAlreadyConfirmed ->