test(ui): speed up chat icon mocks

ui/src/ui/chat/grouped-render.test.ts

@@ -26,12 +26,7 @@ vi.mock("../markdown.ts", () => ({
 }));
 
 vi.mock("../icons.ts", () => ({
-  icons: new Proxy(
-    {},
-    {
-      get: () => "",
-    },
-  ),
+  icons: {},
 }));
 
 vi.mock("../views/agents-utils.ts", () => {

ui/src/ui/chat/run-controls.test.ts

@@ -4,6 +4,10 @@ import { render } from "lit";
 import { describe, expect, it, vi } from "vitest";
 import { renderChatRunControls, type ChatRunControlsProps } from "./run-controls.ts";
 
+vi.mock("../icons.ts", () => ({
+  icons: {},
+}));
+
 function createProps(overrides: Partial<ChatRunControlsProps> = {}): ChatRunControlsProps {
   return {
     canAbort: false,

ui/src/ui/chat/status-indicators.test.ts

@@ -4,6 +4,10 @@ import { html, render } from "lit";
 import { describe, expect, it, vi } from "vitest";
 import { renderCompactionIndicator, renderFallbackIndicator } from "./status-indicators.ts";
 
+vi.mock("../icons.ts", () => ({
+  icons: {},
+}));
+
 describe("chat status indicators", () => {
   it("renders compaction and fallback indicators while they are fresh", () => {
     const container = document.createElement("div");

ui/src/ui/chat/tool-cards.test.ts

@@ -5,12 +5,7 @@ import { describe, expect, it, vi } from "vitest";
 import { buildToolCardSidebarContent, extractToolCards, renderToolCard } from "./tool-cards.ts";
 
 vi.mock("../icons.ts", () => ({
-  icons: new Proxy(
-    {},
-    {
-      get: () => "",
-    },
-  ),
+  icons: {},
 }));
 
 vi.mock("../tool-display.ts", () => ({

ui/src/ui/views/chat.test.ts

@@ -8,12 +8,7 @@ import { renderWelcomeState } from "../chat/chat-welcome.ts";
 import type { ChatQueueItem } from "../ui-types.ts";
 
 vi.mock("../icons.ts", () => ({
-  icons: new Proxy(
-    {},
-    {
-      get: () => "",
-    },
-  ),
+  icons: {},
 }));
 
 vi.mock("./agents-utils.ts", () => ({