feat: add dashboard ui view

src/dashboard/messages.test.ts

@@ -63,25 +63,22 @@ describe("parseDashboardInboundMessage", () => {
 	it("rejects non-objects", () => {
 		const result = parseDashboardInboundMessage(null);
 		expect(result.isErr()).toBe(true);
-		if (result.isErr()) {
-			expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
-		}
+		if (result.isOk()) return;
+		expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
 	});
 
 	it("rejects unknown type", () => {
 		const result = parseDashboardInboundMessage({ type: "explode" });
 		expect(result.isErr()).toBe(true);
-		if (result.isErr()) {
-			expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
-		}
+		if (result.isOk()) return;
+		expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
 	});
 
 	it("rejects selectTask without id", () => {
 		const result = parseDashboardInboundMessage({ type: "selectTask" });
 		expect(result.isErr()).toBe(true);
-		if (result.isErr()) {
-			expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
-		}
+		if (result.isOk()) return;
+		expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
 	});
 
 	it("rejects setGroupBy with invalid groupBy", () => {
@@ -90,9 +87,8 @@ describe("parseDashboardInboundMessage", () => {
 			groupBy: "assignee",
 		});
 		expect(result.isErr()).toBe(true);
-		if (result.isErr()) {
-			expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
-		}
+		if (result.isOk()) return;
+		expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
 	});
 
 	it("rejects saveDescription with non-string description", () => {
@@ -102,8 +98,7 @@ describe("parseDashboardInboundMessage", () => {
 			description: 42,
 		});
 		expect(result.isErr()).toBe(true);
-		if (result.isErr()) {
-			expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
-		}
+		if (result.isOk()) return;
+		expect(result.error.variant).toBe(AppErrorVariant.INVALID_MESSAGE);
 	});
 });

src/dashboard/outboundMessages.ts

@@ -0,0 +1,17 @@
+import { AppError } from "@/error";
+import { Task } from "@/model/task";
+import { TaskFilter } from "./filterTasks";
+import { GroupBy, TaskGroup } from "./groupTasks";
+
+/** Host → webview messages (presentation payload only). */
+export type DashboardOutboundMessage =
+	| {
+			type: "state";
+			filter: TaskFilter;
+			groupBy: GroupBy;
+			selectedId: string | undefined;
+			groups: TaskGroup[];
+			selected: Task | null;
+	  }
+	| { type: "error"; error: AppError }
+	| { type: "saved"; task: Task };