fix(query): serialize 64-bit integers beyond js safe range as strings

Closes #7832

apps/desktop/src/lib/__tests__/dataGrid/cellValue.spec.ts

@@ -1,5 +1,19 @@
 import { describe, expect, it } from "vitest";
-import { firstLineCellDisplayValue } from "@/lib/dataGrid/cellValue";
+import { displayCellValue, firstLineCellDisplayValue } from "@/lib/dataGrid/cellValue";
+
+describe("displayCellValue", () => {
+  it("renders 64-bit integer strings beyond the JS safe range verbatim (issue #7832)", () => {
+    // The Rust backend ships BIGINT cells above ±(2^53 - 1) as decimal
+    // strings; the grid must keep every digit instead of routing them
+    // through Number(), which zeroes the trailing digits.
+    expect(displayCellValue("1391198305898897409")).toBe("1391198305898897409");
+    expect(displayCellValue("18446744073709551615")).toBe("18446744073709551615");
+    expect(displayCellValue("-9007199254740992")).toBe("-9007199254740992");
+    // Safe-range integers keep crossing as JSON numbers.
+    expect(displayCellValue(9007199254740991)).toBe("9007199254740991");
+    expect(displayCellValue(42)).toBe("42");
+  });
+});
 
 describe("firstLineCellDisplayValue", () => {
   it("shows only the first line in fixed-height cells", () => {

apps/desktop/src/lib/__tests__/dataGrid/dataGridSort.spec.ts

@@ -59,6 +59,21 @@ describe("simpleDataGridOrderByMatchesSort", () => {
   });
 });
 
+describe("compareDataGridValues numeric ordering", () => {
+  it("sorts bigint string cells beyond the JS safe range numerically (issue #7832)", () => {
+    // BIGINT cells above ±(2^53 - 1) cross the backend boundary as decimal
+    // strings, like DECIMAL cells; numeric columns must still order them by
+    // magnitude instead of falling back to collation or double rounding.
+    const columnType = "bigint";
+    expect(compareDataGridValues("1391198305898897409", "1391198305898909792", columnType)).toBeLessThan(0);
+    expect(compareDataGridValues("1391198305898909792", "1391198305898897409", columnType)).toBeGreaterThan(0);
+    expect(compareDataGridValues("9007199254740993", "1391198305898897409", columnType)).toBeLessThan(0);
+    expect(compareDataGridValues(42, "9007199254740993", columnType)).toBeLessThan(0);
+    expect(compareDataGridValues("-9007199254740992", "42", columnType)).toBeLessThan(0);
+    expect(compareDataGridValues("1391198305898897409", "1391198305898897409", columnType)).toBe(0);
+  });
+});
+
 describe("compareDataGridValues datetime ordering", () => {
   it("orders space-separated timestamps with microsecond precision", () => {
     expect(compareDataGridValues("2024-01-01 12:00:00.123456", "2024-01-01 12:00:00.500000")).toBeLessThan(0);