Fit the empty Toolkits grid to the viewport

Each ToolkitSection shelf reserved a fixed ~3-row min-height, so the
cloud grid's Workspace + Personal stack overflowed the viewport and
scrolled even with zero toolkits (and padded short shelves with dead
space). Size sections to content instead; the skeleton matches, and a
new selfhost scenario pins the empty grid to its scroll boundary.

Author: baggiiiie

.changeset/toolkits-empty-grid.md

@@ -0,0 +1,5 @@
+---
+"executor": patch
+---
+
+Prevent the empty Toolkits page from scrolling past its visible add cards.

e2e/selfhost/toolkits-empty-grid.test.ts

@@ -0,0 +1,56 @@
+// An empty Toolkits grid must fit the viewport: with no toolkits in either
+// scope, both the Workspace and Personal add cards sit above the fold and the
+// grid does not scroll. Regression: each shelf reserved a fixed ~3-row
+// min-height, so two empty shelves stacked past the viewport and the page
+// scrolled with nothing to see.
+import { expect } from "@effect/vitest";
+import { Effect } from "effect";
+
+import { scenario } from "../src/scenario";
+import { Browser, Target } from "../src/services";
+import { visit } from "../src/surfaces/browser";
+
+scenario(
+  "Toolkits · empty grid fits the viewport without scrolling",
+  { timeout: 120_000 },
+  Effect.gen(function* () {
+    const target = yield* Target;
+    const browser = yield* Browser;
+    const identity = yield* target.newIdentity();
+
+    yield* browser.session(identity, async ({ page, step }) => {
+      await step("Open the Toolkits page with no toolkits in either scope", async () => {
+        await visit(page, "/default/toolkits/");
+        await page.getByRole("heading", { name: "Toolkits", level: 1 }).waitFor();
+        await page.getByRole("heading", { name: "Workspace" }).waitFor();
+        await page.getByRole("heading", { name: "Personal" }).waitFor();
+        await page.getByRole("button", { name: "Add workspace toolkit" }).waitFor();
+        await page.getByRole("button", { name: "Add personal toolkit" }).waitFor();
+        await page.locator('main [data-slot="skeleton"]').first().waitFor({ state: "detached" });
+      });
+
+      await step("The empty grid does not overflow its scroll container", async () => {
+        // Walk up from the Personal add card to its nearest scrollable
+        // ancestor; on an empty grid that ancestor must have nothing to
+        // scroll. This is the user-visible contract — both add cards are
+        // reachable without scrolling — measured at the scroll boundary.
+        const overflow = await page.evaluate(() => {
+          const addCard = [...document.querySelectorAll("button")].find(
+            (button) => button.getAttribute("aria-label") === "Add personal toolkit",
+          );
+          let node: HTMLElement | null = addCard ?? null;
+          while (node && node.scrollHeight <= node.clientHeight + 1) {
+            node = node.parentElement;
+          }
+          if (!node) return null;
+          return {
+            tag: node.tagName,
+            scrollHeight: node.scrollHeight,
+            clientHeight: node.clientHeight,
+          };
+        });
+        expect(overflow, "no scrollable ancestor overflows for an empty grid").toBeNull();
+      });
+    });
+  }),
+);

packages/plugins/toolkits/src/page.tsx

@@ -181,7 +181,6 @@ const toolkitByRouteSlug = (
 };
 
 const toolkitCardStyle = { minHeight: "9rem" };
-const toolkitShelfStyle = { minHeight: "28.5rem" };
 const toolkitGridContainerStyle = { maxWidth: "80rem" };
 const toolkitToolTreeStyle = { width: "24rem" };
 
@@ -636,10 +635,7 @@ function ToolkitSection(props: {
         </div>
       ) : null}
 
-      <div
-        className="grid content-start grid-cols-1 gap-3 sm:grid-cols-2 md:grid-cols-3"
-        style={toolkitShelfStyle}
-      >
+      <div className="grid content-start grid-cols-1 gap-3 sm:grid-cols-2 md:grid-cols-3">
         {rows.map((toolkit) => (
           <ToolkitTile key={toolkit.id} showOwnerLabels={props.showOwnerLabels} toolkit={toolkit} />
         ))}
@@ -1204,10 +1200,7 @@ function ToolkitSectionSkeleton(props: { title?: string }) {
         </div>
       ) : null}
 
-      <div
-        className="grid content-start grid-cols-1 gap-3 sm:grid-cols-2 md:grid-cols-3"
-        style={toolkitShelfStyle}
-      >
+      <div className="grid content-start grid-cols-1 gap-3 sm:grid-cols-2 md:grid-cols-3">
         <ToolkitTileSkeleton />
       </div>
     </section>