feat: use router to group routes

internal/middleware/middleware.go

@@ -0,0 +1,44 @@
+package middleware
+
+import (
+	"net/http"
+
+	"git.juancwu.dev/juancwu/budgit/internal/ui"
+	"git.juancwu.dev/juancwu/budgit/internal/ui/pages"
+)
+
+type Middleware func(http.Handler) http.HandlerFunc
+
+// Chain applies multiple middleware in order (first to last)
+// The middleware are executed in the order they are provided
+//
+// Example:
+//
+//	handler := Chain(mux,
+//	    AuthMiddleware(...),  // Executes first
+//	    WithURLPath,          // Executes second
+//	    Config(...),          // Executes third
+//	)
+func Chain(h http.Handler, middlewares ...Middleware) http.Handler {
+	// Apply middleware in reverse order so they execute in the order provided
+	for i := len(middlewares) - 1; i >= 0; i-- {
+		h = middlewares[i](h)
+	}
+	return h
+}
+
+// Redirect handles both HTMX and regular HTTP redirects.
+// For HTMX requests, it sets the HX-Redirect header; for regular requests,
+// it uses http.Redirect.
+func redirect(w http.ResponseWriter, r *http.Request, path string, code int) {
+	if r.Header.Get("HX-Request") == "true" {
+		w.Header().Set("HX-Redirect", path)
+		w.WriteHeader(code)
+		return
+	}
+	http.Redirect(w, r, path, code)
+}
+
+func notfound(w http.ResponseWriter, r *http.Request) {
+	ui.Render(w, r, pages.NotFound())
+}