Keep first inserted grid row visible while editing

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

@@ -4883,7 +4883,16 @@ function drawCanvasGrid() {
   });
 }
 
-watch(useCanvasGridRows, () => nextTick(attachCanvasResizeObserver), { immediate: true });
+watch(
+  [useCanvasGridRows, hasVisibleRows],
+  () => {
+    // When an empty table gets its first pending row, the canvas scroller is created by
+    // the v-if branch after the original mount-time observer attempt has already no-op'd.
+    // Reattach after that branch mounts so the canvas/overlay get real viewport dimensions.
+    nextTick(attachCanvasResizeObserver);
+  },
+  { immediate: true },
+);
 watch(showDataGridTopbar, () => nextTick(observeDataGridTopbarWidth), { immediate: true });
 watch(
   [