chore(app): clean up e2e helpers — delete duplicates, dead code, and redundant seeding (#723)

- Delete clickNewTabButton (duplicate of clickNewChat) and clickNewTerminalButton (duplicate of clickNewTerminal); update all call sites
- Rename clickTerminal → clickNewTerminal to match clickNewChat naming pattern
- Delete waitForLauncherPanel (deprecated no-op)
- Delete waitForAgentFinishUI and getToolCallCount (dead exports never imported)
- Remove ensureE2EStorageSeeded, assertE2EUsesSeededTestDaemon, and related helpers from app.ts — the paseoE2ESetup auto-fixture seeds via addInitScript on every navigation, making these redundant
- Simplify gotoAppShell to a one-liner; simplify gotoHome to use .or() instead of three-way if-else chain
- Strip try/catch self-heal from ensureHostSelected — the fixture guarantees preferences alignment, so the workaround is never needed

packages/app/e2e/workspace-setup-runtime.spec.ts

@@ -1,7 +1,7 @@
 import { existsSync } from "node:fs";
 import { expect, test } from "./fixtures";
 import { createTempGitRepo } from "./helpers/workspace";
-import { clickTerminal, waitForTabBar } from "./helpers/launcher";
+import { clickNewTerminal, waitForTabBar } from "./helpers/launcher";
 import {
   connectWorkspaceSetupClient,
   createWorkspaceThroughDaemon,
@@ -86,7 +86,7 @@ test.describe("Workspace setup runtime authority", () => {
       await openHomeWithProject(page, repo.path);
       await navigateToWorkspaceViaSidebar(page, workspaceId);
 
-      await clickTerminal(page);
+      await clickNewTerminal(page);
 
       const terminal = page.locator('[data-testid="terminal-surface"]');
       await expect(terminal.first()).toBeVisible({ timeout: 20_000 });