make all books public by default (revert visibility gating)

backend/internal/storage/store.go

@@ -86,12 +86,11 @@ func (s *Store) WriteMetadata(ctx context.Context, meta domain.BookMeta) error {
 		return fmt.Errorf("WriteMetadata: %w", err)
 	}
 	if err == ErrNotFound {
-		// New scraped book — default to admin_only visibility.
 		postPayload := make(map[string]any, len(patchPayload)+1)
 		for k, v := range patchPayload {
 			postPayload[k] = v
 		}
-		postPayload["visibility"] = domain.VisibilityAdminOnly
+		postPayload["visibility"] = domain.VisibilityPublic
 		postErr := s.pb.post(ctx, "/api/collections/books/records", postPayload, nil)
 		if postErr == nil {
 			return nil

backend/migrations/20260427000001_make_all_books_public.go

@@ -0,0 +1,42 @@
+package migrations
+
+import (
+	"github.com/pocketbase/pocketbase/core"
+	m "github.com/pocketbase/pocketbase/migrations"
+)
+
+func init() {
+	m.Register(func(app core.App) error {
+		coll, err := app.FindCollectionByNameOrId("books")
+		if err != nil {
+			return err
+		}
+
+		if coll.Fields.GetByName("visibility") == nil {
+			coll.Fields.Add(&core.TextField{Name: "visibility"})
+			if err := app.Save(coll); err != nil {
+				return err
+			}
+		}
+
+		const perPage = 200
+		for page := 1; ; page++ {
+			records, err := app.FindRecordsByFilter(
+				"books", `visibility="admin_only"`, "+id", perPage, (page-1)*perPage, nil,
+			)
+			if err != nil || len(records) == 0 {
+				break
+			}
+			for _, rec := range records {
+				rec.Set("visibility", "public")
+				_ = app.Save(rec)
+			}
+			if len(records) < perPage {
+				break
+			}
+		}
+		return nil
+	}, func(app core.App) error {
+		return nil
+	})
+}