fix(ledger): keep legacy amount wire type and preserve dividend tax decimals

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

app/api/v1_portfolios.py

@@ -688,11 +688,14 @@ def record_ledger_trade_v1(
 
 def _manual_entry_to_response(entry) -> ManualLedgerResponse:
     action = (entry.action or entry.side or "").upper()
-    amount = (
-        (entry.price_decimal if entry.price_decimal is not None else Decimal(str(entry.price)))
-        if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"}
-        else None
-    )
+    amount: float | Decimal | None = None
+    if action == "DIVIDEND":
+        amount = entry.price_decimal if entry.price_decimal is not None else Decimal(str(entry.price))
+    elif action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT"}:
+        amount = float(entry.price)
+    tax_value: float | Decimal = float(entry.tax_amount)
+    if action == "DIVIDEND":
+        tax_value = entry.tax_amount_decimal if entry.tax_amount_decimal is not None else Decimal(str(entry.tax_amount))
     return ManualLedgerResponse(
         ledger_entry_id=entry.ledger_entry_id,
         portfolio_id=entry.portfolio_id,
@@ -701,7 +704,7 @@ def _manual_entry_to_response(entry) -> ManualLedgerResponse:
         quantity=entry.quantity,
         price=entry.price,
         fee=entry.fee_amount,
-        tax=entry.tax_amount,
+        tax=tax_value,
         executed_at=entry.executed_at,
         note=entry.note,
         recorded_at=entry.recorded_at,
@@ -791,9 +794,14 @@ def _decode_ledger_cursor(cursor: str, *, portfolio_id: str, source: str | None)
 
 def _ledger_entry_to_history_item(entry) -> LedgerHistoryItem:
     action = (entry.action or entry.side or "").upper()
-    amount = None
-    if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"}:
+    amount: float | Decimal | None = None
+    if action == "DIVIDEND":
         amount = entry.price_decimal if entry.price_decimal is not None else Decimal(str(entry.price))
+    elif action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT"}:
+        amount = float(entry.price)
+    tax_amount: float | Decimal | None = entry.tax_amount
+    if action == "DIVIDEND":
+        tax_amount = entry.tax_amount_decimal if entry.tax_amount_decimal is not None else Decimal(str(entry.tax_amount))
     return LedgerHistoryItem(
         ledger_entry_id=entry.ledger_entry_id,
         portfolio_id=entry.portfolio_id,
@@ -807,7 +815,7 @@ def _ledger_entry_to_history_item(entry) -> LedgerHistoryItem:
         amount=amount,
         price=entry.price,
         fee_amount=entry.fee_amount,
-        tax_amount=entry.tax_amount,
+        tax_amount=tax_amount,
         note=entry.note,
         cash_balance_after=entry.cash_balance_after,
         asset_quantity_after=entry.asset_quantity_after,