feat: add http utilities to middleware package

internal/middleware/utils.go

@@ -0,0 +1,23 @@
+package middleware
+
+import (
+	"net/http"
+
+	"git.juancwu.dev/juancwu/budgit/internal/ui"
+	"git.juancwu.dev/juancwu/budgit/internal/ui/pages"
+)
+
+func redirect(w http.ResponseWriter, r *http.Request, path string, code int) {
+	// For HTMX requests, use HX-Redirect header to force full page redirect
+	if r.Header.Get("HX-Request") == "true" {
+		w.Header().Set("HX-Redirect", "/auth")
+		w.WriteHeader(code)
+		return
+	}
+	// For regular requests, use standard redirect
+	http.Redirect(w, r, "/auth", code)
+}
+
+func notfound(w http.ResponseWriter, r *http.Request) {
+	ui.Render(w, r, pages.NotFound())
+}