feat: move color themes into a bundled themes plugin

scripts/plugin-validate.test.ts

@@ -99,3 +99,48 @@ describe("termix-plugin validate themes", () => {
     expect(output).not.toContain("theme paper");
   });
 });
+
+describe("termix-plugin validate layouts and capabilities", () => {
+  function withManifest(extra: Record<string, unknown>) {
+    const root = plugin([]);
+    fs.writeFileSync(
+      path.join(root, "manifest.json"),
+      JSON.stringify({ id: "fixture", version: "1.0.0", ...extra }),
+    );
+    return root;
+  }
+
+  it("flags ui:theme with no themes and ui:layout with no layouts", async () => {
+    const output = await problems(
+      withManifest({ capabilities: ["ui:theme", "ui:layout"] }),
+    );
+    expect(output).toContain(
+      '"ui:theme" is declared but contributes.themes is empty',
+    );
+    expect(output).toContain(
+      '"ui:layout" is declared but contributes.layouts is empty',
+    );
+  });
+
+  it("flags a layout plugin with no frontend source", async () => {
+    const output = await problems(
+      withManifest({
+        capabilities: ["ui:layout"],
+        contributes: { layouts: [{ id: "wide", label: "Wide" }] },
+      }),
+    );
+    expect(output).toContain("contributes.layouts needs a frontend");
+  });
+
+  it("accepts a layout plugin that has a frontend entry", async () => {
+    const root = withManifest({
+      capabilities: ["ui:layout"],
+      contributes: { layouts: [{ id: "wide", label: "Wide" }] },
+    });
+    fs.mkdirSync(path.join(root, "src", "frontend"), { recursive: true });
+    fs.writeFileSync(path.join(root, "src", "frontend", "index.tsx"), "");
+    const output = await problems(root);
+    expect(output).not.toContain("contributes.layouts needs a frontend");
+    expect(output).not.toContain("is declared but");
+  });
+});