feat: update embed.go to embed all assets and add tests for SPA asset inclusion

web/embed.go

@@ -4,5 +4,5 @@ package webspa
 
 import "embed"
 
-//go:embed out
+//go:embed all:out
 var SPA embed.FS

web/embed_test.go

@@ -0,0 +1,20 @@
+package webspa
+
+import (
+	"io/fs"
+	"testing"
+)
+
+func TestEmbeddedSPAIncludesNextExportAssets(t *testing.T) {
+	nextStaticInfo, err := fs.Stat(SPA, "out/_next/static")
+	if err != nil {
+		t.Fatalf("embedded SPA missing Next static assets: %v", err)
+	}
+	if !nextStaticInfo.IsDir() {
+		t.Fatalf("out/_next/static is not a directory")
+	}
+
+	if _, err := fs.Stat(SPA, "out/__next._tree.txt"); err != nil {
+		t.Fatalf("embedded SPA missing Next RSC export data: %v", err)
+	}
+}