fix(docs/storage): resolve FLAW-02, remove unused docDir and update documentation for pure database architecture

internal/storage/sqlite_test.go

@@ -1,7 +1,6 @@
 package storage
 
 import (
-	"os"
 	"path/filepath"
 	"testing"
 
@@ -332,7 +331,6 @@ func TestEnsureDemoAccountsAndLoginLookup(t *testing.T) {
 func TestFolderManagementAndDeletion(t *testing.T) {
 	tmpDir := t.TempDir()
 	dbPath := filepath.Join(tmpDir, "folder_test.db")
-	docDir := filepath.Join(tmpDir, "workspace")
 
 	store, err := NewStore(dbPath)
 	if err != nil {
@@ -345,7 +343,7 @@ func TestFolderManagementAndDeletion(t *testing.T) {
 		t.Fatalf("CreateUser failed: %v", err)
 	}
 
-	// 1. Create folders on disk
+	// 1. Create folders
 	f1, err := store.CreateFolder(user.ID, "Projekte/MindSift")
 	if err != nil || f1 != "Projekte/MindSift" {
 		t.Fatalf("CreateFolder failed: %v, f1=%s", err, f1)
@@ -401,12 +399,6 @@ func TestFolderManagementAndDeletion(t *testing.T) {
 	if err == nil {
 		t.Fatalf("expected doc2 to be deleted")
 	}
-
-	// Verify disk directory was deleted
-	diskFolder := filepath.Join(docDir, user.ID, "Projekte/MindSift")
-	if _, err := os.Stat(diskFolder); !os.IsNotExist(err) {
-		t.Fatalf("expected directory %s to be deleted on disk", diskFolder)
-	}
 }
 
 func TestWorkspaceBlockHashtagsAndDetails(t *testing.T) {