fix(postgres): keep index operator classes in read and generation

Closes #7166

apps/desktop/src/lib/diagram/draft-table.ts

@@ -40,6 +40,7 @@ export function createDraftIndex(tableName: string, columns: string[], existingI
     includedColumns: [],
     comment: "",
     concurrently: false,
+    columnOpclasses: [],
     markedForDrop: false,
   };
 }

apps/desktop/src/lib/table/tableStructureEditorSql.ts

@@ -46,6 +46,8 @@ export interface EditableStructureIndex {
   comment: string;
   /** Build the index with PostgreSQL `CREATE INDEX CONCURRENTLY` (PostgreSQL only, default off). */
   concurrently?: boolean;
+  /** Parallel to `columns`: operator class for each key column (PostgreSQL). `null` means default. */
+  columnOpclasses?: (string | null)[];
   original?: IndexInfo;
   markedForDrop: boolean;
 }

apps/desktop/src/lib/table/tableStructureEditorState.ts

@@ -1029,6 +1029,7 @@ export function createIndexDrafts(indexes: IndexInfo[]): EditableStructureIndex[
     indexType: normalizeStructureIndexType(index.index_type),
     includedColumns: index.included_columns ? [...index.included_columns] : [],
     comment: index.comment ?? "",
+    columnOpclasses: index.column_opclasses ? [...index.column_opclasses] : [],
     original: index,
     markedForDrop: false,
   }));