feat: extract into remaining packages

There has been a cyclic dependency.
transaction
	-> treasure_chest
	-> transaction_recurring
	-> transaction

This has been temporarily solved by moving the GenerateTransactions
function into the transaction package. In the future, this function has
to be rewritten to use a proper Service insteas of direct DB access or
replaced with a different system entirely.

internal/dashboard/handler.go

@@ -5,9 +5,7 @@ import (
 	"log/slog"
 	"net/http"
 	"spend-sparrow/internal/core"
-	"spend-sparrow/internal/dashboard/template"
 	"spend-sparrow/internal/treasure_chest"
-	"spend-sparrow/internal/utils"
 	"strings"
 	"time"
 
@@ -45,7 +43,7 @@ func (handler HandlerImpl) handleDashboard() http.HandlerFunc {
 
 		user := core.GetUser(r)
 		if user == nil {
-			utils.DoRedirect(w, r, "/auth/signin")
+			core.DoRedirect(w, r, "/auth/signin")
 			return
 		}
 
@@ -55,7 +53,7 @@ func (handler HandlerImpl) handleDashboard() http.HandlerFunc {
 			return
 		}
 
-		comp := template.Dashboard(treasureChests)
+		comp := DashboardComp(treasureChests)
 		handler.r.RenderLayoutWithStatus(r, w, comp, user, http.StatusOK)
 	}
 }