fix: address board grid review

apps/nextjs/src/components/board/sections/grid/section-grid-placements.ts

@@ -0,0 +1,49 @@
+import { getBoardLaneColumnCount, getRootSectionLane } from "@homarr/definitions";
+
+import type { Board } from "~/app/[locale]/boards/_types";
+import type { SectionGridPlacement } from "./use-grid-layout-actions";
+
+export const getSectionGridPlacements = (board: Board, layoutId: string, sectionId: string): SectionGridPlacement[] => [
+  ...board.items.flatMap((item) => {
+    const layout = item.layouts.find((candidate) => candidate.layoutId === layoutId);
+    return layout?.sectionId === sectionId
+      ? [
+          {
+            id: item.id,
+            type: "item" as const,
+            x: layout.xOffset,
+            y: layout.yOffset,
+            w: layout.width,
+            h: layout.height,
+          },
+        ]
+      : [];
+  }),
+  ...board.sections.flatMap((section) => {
+    if (section.kind !== "container") return [];
+    const layout = section.layouts.find((candidate) => candidate.layoutId === layoutId);
+    return layout?.parentSectionId === sectionId
+      ? [
+          {
+            id: section.id,
+            type: "section" as const,
+            x: layout.xOffset,
+            y: layout.yOffset,
+            w: layout.width,
+            h: layout.height,
+          },
+        ]
+      : [];
+  }),
+];
+
+export const getSectionGridColumnCount = (board: Board, layoutId: string, sectionId: string): number | null => {
+  const section = board.sections.find((candidate) => candidate.id === sectionId);
+  if (!section) return null;
+  if (section.kind === "container") {
+    return section.layouts.find((layout) => layout.layoutId === layoutId)?.width ?? null;
+  }
+
+  const layout = board.layouts.find((candidate) => candidate.id === layoutId);
+  return layout ? getBoardLaneColumnCount(layout, getRootSectionLane(section.xOffset)) : null;
+};