Add me and unassigned assignee options

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/lib/assignees.test.ts

@@ -0,0 +1,53 @@
+import { describe, expect, it } from "vitest";
+import {
+  assigneeValueFromSelection,
+  currentUserAssigneeOption,
+  formatAssigneeUserLabel,
+  parseAssigneeValue,
+} from "./assignees";
+
+describe("assignee selection helpers", () => {
+  it("encodes and parses agent assignees", () => {
+    const value = assigneeValueFromSelection({ assigneeAgentId: "agent-123" });
+
+    expect(value).toBe("agent:agent-123");
+    expect(parseAssigneeValue(value)).toEqual({
+      assigneeAgentId: "agent-123",
+      assigneeUserId: null,
+    });
+  });
+
+  it("encodes and parses current-user assignees", () => {
+    const [option] = currentUserAssigneeOption("local-board");
+
+    expect(option).toEqual({
+      id: "user:local-board",
+      label: "Me",
+      searchText: "me board human local-board",
+    });
+    expect(parseAssigneeValue(option.id)).toEqual({
+      assigneeAgentId: null,
+      assigneeUserId: "local-board",
+    });
+  });
+
+  it("treats an empty selection as no assignee", () => {
+    expect(parseAssigneeValue("")).toEqual({
+      assigneeAgentId: null,
+      assigneeUserId: null,
+    });
+  });
+
+  it("keeps backward compatibility for raw agent ids in saved drafts", () => {
+    expect(parseAssigneeValue("legacy-agent-id")).toEqual({
+      assigneeAgentId: "legacy-agent-id",
+      assigneeUserId: null,
+    });
+  });
+
+  it("formats current and board user labels consistently", () => {
+    expect(formatAssigneeUserLabel("user-1", "user-1")).toBe("Me");
+    expect(formatAssigneeUserLabel("local-board", "someone-else")).toBe("Board");
+    expect(formatAssigneeUserLabel("user-abcdef", "someone-else")).toBe("user-");
+  });
+});