fix(studio): resolve exact component filenames for Linux previews

packages/design-studio/test/preview-case.test.ts

@@ -0,0 +1,40 @@
+import { expect, test } from "bun:test";
+import { pathToFileURL } from "node:url";
+import { resolve } from "node:path";
+
+test("composed and catalog previews use exact shipped filename casing on every platform", () => {
+  const preview = pathToFileURL(resolve(import.meta.dir, "../src/preview.ts")).href;
+  const probe = `
+    import { mock } from "bun:test";
+    import { readFileSync, readdirSync } from "node:fs";
+    import { dirname, basename } from "node:path";
+    import { uiComponentsDir } from "@wrnexus/ui/registry";
+    import { CORE_DESIGN_SYSTEMS } from "@wrnexus/design-system";
+    const directory = uiComponentsDir();
+    const names = new Set(readdirSync(directory));
+    const originalRead = readFileSync;
+    let checked = 0;
+    mock.module("node:fs", () => ({ readFileSync(path, ...options) {
+      if (typeof path === "string" && dirname(path) === directory && path.endsWith(".wrn")) {
+        if (!names.has(basename(path))) throw Error("Case-sensitive component lookup failed: " + basename(path));
+        checked++;
+      }
+      return originalRead(path, ...options);
+    }}));
+    const { previewDocument } = await import(${JSON.stringify(preview)});
+    await previewDocument(CORE_DESIGN_SYSTEMS.square);
+    for (let page = 0; page < 7; page++) await previewDocument(CORE_DESIGN_SYSTEMS.soft, { content: "catalog", page });
+    if (checked < 104) throw Error("Incomplete component coverage: " + checked);
+    console.log("Exact filename casing verified for all 104 preview components.");
+  `;
+  const result = Bun.spawnSync([process.execPath, "--eval", probe], {
+    cwd: resolve(import.meta.dir, "../../.."),
+    stdout: "pipe",
+    stderr: "pipe",
+  });
+  expect(new TextDecoder().decode(result.stderr)).not.toContain(
+    "Case-sensitive component lookup failed",
+  );
+  expect(result.exitCode).toBe(0);
+  expect(new TextDecoder().decode(result.stdout)).toContain("all 104 preview components");
+});