feat(query): move grid save prep to Rust

packages/app-tests/dataGridSaveBackend.test.ts

@@ -0,0 +1,32 @@
+import { readFileSync } from "node:fs";
+import { strict as assert } from "node:assert";
+import test from "node:test";
+
+const apiSource = readFileSync("apps/desktop/src/lib/api.ts", "utf8");
+const tauriSource = readFileSync("apps/desktop/src/lib/tauri.ts", "utf8");
+const httpSource = readFileSync("apps/desktop/src/lib/http.ts", "utf8");
+const editorSource = readFileSync("apps/desktop/src/composables/useDataGridEditor.ts", "utf8");
+const tauriLibSource = readFileSync("src-tauri/src/lib.rs", "utf8");
+const webMainSource = readFileSync("crates/dbx-web/src/main.rs", "utf8");
+const rustCoreLibSource = readFileSync("crates/dbx-core/src/lib.rs", "utf8");
+
+test("shared API exposes backend data grid save preparation", () => {
+  assert.match(apiSource, /export const prepareDataGridSave = forward\("prepareDataGridSave"\)/);
+  assert.match(tauriSource, /export async function prepareDataGridSave\(/);
+  assert.match(tauriSource, /invoke\("prepare_data_grid_save"/);
+  assert.match(httpSource, /export async function prepareDataGridSave\(/);
+  assert.match(httpSource, /\/api\/query\/prepare-data-grid-save/);
+});
+
+test("data grid save flow uses backend save preparation", () => {
+  assert.match(editorSource, /await api\.prepareDataGridSave\(stmtOptions\)/);
+  assert.doesNotMatch(editorSource, /buildDataGridSaveStatements\(/);
+  assert.doesNotMatch(editorSource, /buildDataGridRollbackStatements\(/);
+  assert.doesNotMatch(editorSource, /validateDataGridSave\(/);
+});
+
+test("Rust backends register data grid save preparation", () => {
+  assert.match(rustCoreLibSource, /pub mod data_grid_sql/);
+  assert.match(tauriLibSource, /commands::query::prepare_data_grid_save/);
+  assert.match(webMainSource, /\/query\/prepare-data-grid-save/);
+});