refactor(desktop): organize lib modules by domain

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

@@ -0,0 +1,28 @@
+import type { QueryTab, ColumnInfo } from "@/types/database";
+
+export type DataTabTableMeta = NonNullable<QueryTab["tableMeta"]>;
+
+function fallbackColumnInfo(name: string): ColumnInfo {
+  return {
+    name,
+    data_type: "",
+    is_nullable: true,
+    column_default: null,
+    is_primary_key: false,
+    extra: null,
+  };
+}
+
+export function tableMetaForDataTab(tab: QueryTab | undefined): DataTabTableMeta | undefined {
+  if (!tab || tab.mode !== "data") return undefined;
+  if (tab.tableMeta) return tab.tableMeta;
+  const tableName = tab.title.trim();
+  if (!tableName) return undefined;
+
+  return {
+    schema: tab.schema,
+    tableName,
+    columns: (tab.result?.columns ?? []).map(fallbackColumnInfo),
+    primaryKeys: [],
+  };
+}