feat: community workshop for custom widgets and CSS (#5984)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

apps/docs/src/lib/workshop-schema.spec.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from "vitest";
+
+import { validateSubmissionContent } from "./workshop-schema";
+
+const validWidget = {
+  $schema: "homarr-custom-widget-v2",
+  name: "Example",
+  url: "https://example.com/api",
+  authType: "none",
+  method: "GET",
+  displayType: "singleValue",
+  displayConfig: { type: "singleValue", jsonPath: "$.count", label: "Count", unit: "" },
+};
+
+describe("validateSubmissionContent", () => {
+  it("accepts a valid homarr-custom-widget-v2 JSON", () => {
+    expect(validateSubmissionContent("widget", JSON.stringify(validWidget)).success).toBe(true);
+  });
+
+  it("rejects an old/unknown widget schema version", () => {
+    const result = validateSubmissionContent(
+      "widget",
+      JSON.stringify({ ...validWidget, $schema: "homarr-custom-widget-v1" }),
+    );
+    expect(result.success).toBe(false);
+  });
+
+  it("rejects widgets without a schema version", () => {
+    const widgetWithoutSchema = {
+      name: validWidget.name,
+      url: validWidget.url,
+      authType: validWidget.authType,
+      method: validWidget.method,
+      displayType: validWidget.displayType,
+      displayConfig: validWidget.displayConfig,
+    };
+
+    expect(validateSubmissionContent("widget", JSON.stringify(widgetWithoutSchema)).success).toBe(false);
+  });
+
+  it("rejects malformed widget JSON", () => {
+    expect(validateSubmissionContent("widget", "{ not json").success).toBe(false);
+  });
+
+  it("accepts non-empty CSS and rejects empty CSS", () => {
+    expect(validateSubmissionContent("css", ".card { color: red; }").success).toBe(true);
+    expect(validateSubmissionContent("css", "   ").success).toBe(false);
+  });
+});