fix: restore translucent dashboard styling (#6664)

* fix: restore translucent dashboard styling

* fix: restore dashboard widget transparency

* fix: address dashboard review feedback

* fix: apply board opacity to containers

* fix: flatten demo board container

* fix: default board roundness to sm

* fix: restore assistant widget transparency

* Revert "fix: default board roundness to sm"

This reverts commit c235cbdf2b.

* fix: address remaining dashboard review comments

* test: align grid geometry expectations

apps/nextjs/src/components/board/sections/grid/section-grid.tsx

@@ -130,6 +130,10 @@ export const SectionGrid = ({
   const contentRowCount = Math.max(1, getLayoutRowCount(displayPlacements));
   const rowCount = Math.max(contentRowCount, requestedRowCount, minimumViewportRowCount);
   const maxRowCount = section.kind === "container" || railPlacement !== "main" ? rowCount : null;
+  let placementMaxRowCount = maxRowCount;
+  if (railPlacement !== "main") {
+    placementMaxRowCount = minimumViewportRowCount;
+  }
   // A scrollable container isn't forced to grow with its content - it scrolls internally instead
   // of expanding to fit every widget, so its viewport height is capped independently of rowCount.
   const isScrollableContainer = section.kind === "container" && section.options.scrollable;
@@ -175,6 +179,7 @@ export const SectionGrid = ({
       columnCount,
       rowCount,
       maxRowCount,
+      placementMaxRowCount,
       placements: displayPlacements,
       transactionPlacements: placements,
       className: editorClassName,
@@ -190,6 +195,7 @@ export const SectionGrid = ({
     entryElementStore,
     isInteractionDisabled,
     maxRowCount,
+    placementMaxRowCount,
     placements,
     rowCount,
     section,