fix(mongodb): keep collection results across tab switches

apps/desktop/src/components/grid/DataGrid.vue

@@ -488,6 +488,13 @@ interface DataGridProps {
   cacheKey?: string;
   columnWidthCacheKey?: string;
   pendingStateKey?: string;
+  /**
+   * Owner key for the tab-switch view snapshot. Defaults to `cacheKey`, which
+   * is what query and data tabs use. Document tabs (MongoDB collections) set it
+   * on its own because `cacheKey` also scopes structured filters, column widths
+   * and pending edits, and they must keep those scopes as they are (#8679).
+   */
+  viewStateKey?: string;
   /**
    * Logical-result identity (`QueryTab.resultViewGeneration`) the grid is
    * currently rendering. The tab-switch view snapshot is captured with this
@@ -4970,6 +4977,9 @@ function cancelViewSnapshotRestoreFrame() {
 }
 
 /** Bounded integrity probe of the result the grid is currently rendering. */
+/** Snapshot owner; falls back to `cacheKey` for query and data tabs. */
+const viewSnapshotOwnerKey = computed(() => props.viewStateKey?.trim() || props.cacheKey?.trim() || undefined);
+
 function currentViewProbe(): string {
   const rows = props.result.rows;
   return buildDataGridViewProbe({
@@ -5096,13 +5106,14 @@ function expandRowRange(range: readonly number[], displayCount: number): number[
  */
 function captureTabSwitchViewSnapshot() {
   if (!DATA_GRID_VIEW_SNAPSHOT_RESTORE) return;
-  if (!props.cacheKey || !props.viewGeneration) return;
+  const ownerKey = viewSnapshotOwnerKey.value;
+  if (!ownerKey || !props.viewGeneration) return;
   if (showTranspose.value) return;
   const scroller = useCanvasGridRows.value ? canvasScrollerElement() : gridScrollerElement();
   if (!scroller) return;
   const { selection, droppedSelection } = captureViewSelection();
   saveDataGridViewSnapshot({
-    ownerKey: props.cacheKey,
+    ownerKey,
     viewGeneration: props.viewGeneration,
     probe: currentViewProbe(),
     renderer: useCanvasGridRows.value ? "canvas" : "dom",
@@ -5122,7 +5133,7 @@ function captureTabSwitchViewSnapshot() {
 function restoreTabSwitchViewSnapshot() {
   if (!DATA_GRID_VIEW_SNAPSHOT_RESTORE) return;
   if (!structuredFilterHydrationReady.value) return;
-  const ownerKey = props.cacheKey;
+  const ownerKey = viewSnapshotOwnerKey.value;
   if (!ownerKey || !props.viewGeneration) return;
   if (showTranspose.value) return;
   const snapshot = peekDataGridViewSnapshot(ownerKey);

apps/desktop/src/components/grid/__tests__/DataGridViewSnapshotRestore.spec.ts

@@ -17,13 +17,21 @@ describe("DataGrid tab-switch view snapshots", () => {
   const restoreSource = functionSource("restoreTabSwitchViewSnapshot", "const multiRowCount = computed(");
 
   it("captures only with an owner key and a generation, and skips transpose", () => {
-    expect(captureFnSource).toContain("if (!props.cacheKey || !props.viewGeneration) return;");
+    expect(captureFnSource).toContain("if (!ownerKey || !props.viewGeneration) return;");
     expect(captureFnSource).toContain("if (showTranspose.value) return;");
-    expect(captureFnSource).toContain("ownerKey: props.cacheKey");
+    expect(captureFnSource).toContain("ownerKey,");
     expect(captureFnSource).toContain("viewGeneration: props.viewGeneration");
     expect(captureFnSource).toContain("probe: currentViewProbe()");
   });
 
+  it("takes the snapshot owner from viewStateKey, falling back to cacheKey", () => {
+    // Document tabs need their own owner key: cacheKey also scopes structured
+    // filters, column widths and pending edits, which they leave untouched.
+    expect(dataGridSource).toContain("const viewSnapshotOwnerKey = computed(() => props.viewStateKey?.trim() || props.cacheKey?.trim() || undefined);");
+    expect(captureFnSource).toContain("const ownerKey = viewSnapshotOwnerKey.value;");
+    expect(restoreSource).toContain("const ownerKey = viewSnapshotOwnerKey.value;");
+  });
+
   it("captures the selection in O(selection size), never through the refresh identity scan", () => {
     // Copies refs directly instead of captureCurrentSelectionForRefresh, which
     // builds an identity token for every row (O(row count) on a large result).