feat: personal library — filter by read/saved books, add save button

scraper/internal/storage/pocketbase.go

@@ -368,6 +368,16 @@ func (s *PocketBaseStore) EnsureCollections(ctx context.Context) error {
 				{"name": "created", "type": "date"},
 			},
 		},
+		{
+			"name": "user_library",
+			"type": "base",
+			"fields": []map[string]interface{}{
+				{"name": "session_id", "type": "text", "required": true},
+				{"name": "user_id", "type": "text"},
+				{"name": "slug", "type": "text", "required": true},
+				{"name": "saved_at", "type": "date"},
+			},
+		},
 		{
 			"name": "scraping_tasks",
 			"type": "base",