refactor: restructure in entirety

internal/handler/invoices.go

@@ -0,0 +1,33 @@
+package handler
+
+import "billit/internal/view"
+import (
+	"billit/internal/database"
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+// InvoicesHandlers holds db reference for invoice operations
+type InvoicesHandlers struct {
+	db database.Service
+}
+
+// NewInvoicesHandlers creates handlers with db access
+func NewInvoicesHandlers(db database.Service) *InvoicesHandlers {
+	return &InvoicesHandlers{db: db}
+}
+
+// InvoicesListHandler renders the /invoice page with all invoices
+func (h *InvoicesHandlers) InvoicesListHandler(c echo.Context) error {
+	userID := getUserID(c)
+	if userID == "" {
+		return c.Redirect(http.StatusFound, "/")
+	}
+
+	invoices, err := h.db.GetAllInvoices(userID)
+	if err != nil {
+		return view.RenderServerError(c, "Failed to load invoices. Please try again.")
+	}
+	return view.Render(c, view.InvoicesPage(invoices))
+}