Configure initial bank history in the connection UI

internal/app/consent.go

@@ -8,30 +8,42 @@ import (
 	"finance-duck/internal/domain"
 )
 
+const defaultHistoryMonths = 12
+
 type authorization struct {
-	Expires     time.Time
-	Institution string
-	Country     string
+	Expires       time.Time
+	Institution   string
+	Country       string
+	HistoryMonths int
 }
 type Consent struct {
 	Institution    string `json:"institution"`
 	Country        string `json:"country"`
+	HistoryMonths  int    `json:"history_months"`
 	Error          string `json:"error,omitempty"`
 	NeedsReconnect bool   `json:"needs_reconnect"`
 }
 type Connection struct {
-	AccountID   string `json:"account_id"`
-	Institution string `json:"institution"`
-	Country     string `json:"country"`
-	Status      string `json:"status"`
-	ValidUntil  string `json:"valid_until"`
-	Error       string `json:"error"`
+	AccountID     string `json:"account_id"`
+	Institution   string `json:"institution"`
+	Country       string `json:"country"`
+	HistoryMonths int    `json:"history_months"`
+	Status        string `json:"status"`
+	ValidUntil    string `json:"valid_until"`
+	Error         string `json:"error"`
+}
+
+func (c Consent) historyMonths() int {
+	if c.HistoryMonths == 0 {
+		return defaultHistoryMonths
+	}
+	return c.HistoryMonths
 }
 
 func (a *App) connections(d domain.Dataset) []Connection {
 	out := make([]Connection, 0, len(d.Accounts))
 	for _, account := range d.Accounts {
-		c := Connection{AccountID: account.ID, Institution: account.Institution, Country: "DE", Status: "local"}
+		c := Connection{AccountID: account.ID, Institution: account.Institution, Country: "DE", HistoryMonths: defaultHistoryMonths, Status: "local"}
 		if account.ExternalAccountID != "" {
 			c.Status = "reconnect_required"
 			c.Error = "No saved bank consent; reconnect this account"
@@ -42,6 +54,7 @@ func (a *App) connections(d domain.Dataset) []Connection {
 					continue
 				}
 				meta := a.ops.Consents[session.ID]
+				c.HistoryMonths = meta.historyMonths()
 				if meta.Institution != "" {
 					c.Institution = meta.Institution
 				}