fix(table-paste): surface first batch paste error

Closes #4832

apps/desktop/src/lib/table/__tests__/tableClipboard.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { tableClipboardMatchesTarget, tableClipboardMenuState, tableClipboardSourceContext } from "@/lib/table/tableClipboard";
+import { tableClipboardMatchesTarget, tableClipboardMenuState, tableClipboardSourceContext, tablePasteFeedback } from "@/lib/table/tableClipboard";
 
 describe("table clipboard contexts", () => {
   const source = { connectionId: "source", database: "app", schema: "public" };
@@ -23,4 +23,11 @@ describe("table clipboard contexts", () => {
     expect(tableClipboardMenuState([sourceTable], targetTable)).toBe("copy");
     expect(tableClipboardMenuState([sourceTable], targetTable, true)).toBe("copy-and-paste");
   });
+
+  it("keeps batch feedback bounded to the first paste error", () => {
+    const firstError = { code: "permission-denied" };
+    const feedback = tablePasteFeedback(0, 3, firstError);
+
+    expect(feedback).toEqual({ successCount: 0, failedCount: 3, firstError });
+  });
 });

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

@@ -20,6 +20,21 @@ export interface TableDataCopyColumnOptions {
   sqlserverIdentityInsert: boolean;
 }
 
+export interface TablePasteFeedback {
+  successCount: number;
+  failedCount: number;
+  firstError: unknown;
+}
+
+/** Keep batch paste feedback bounded while preserving the first actionable error. */
+export function tablePasteFeedback(successCount: number, failedCount: number, firstError: unknown): TablePasteFeedback {
+  return {
+    successCount,
+    failedCount,
+    firstError,
+  };
+}
+
 function normalizeSchema(schema: string | null | undefined): string {
   return schema?.trim() ?? "";
 }