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/helpers/workspace-lifecycle.ts

@@ -1,5 +1,5 @@
 import { expect, type Page } from "@playwright/test";
-import { clickNewChat, clickTerminal } from "./launcher";
+import { clickNewChat, clickNewTerminal } from "./launcher";
 import { setupDeterministicPrompt, waitForTerminalContent } from "./terminal-perf";
 
 function terminalSurface(page: Page) {
@@ -20,7 +20,7 @@ export async function expectTerminalCwd(page: Page, expectedPath: string): Promi
 }
 
 export async function createStandaloneTerminalFromLauncher(page: Page): Promise<void> {
-  await clickTerminal(page);
+  await clickNewTerminal(page);
   await expect(terminalSurface(page)).toBeVisible({ timeout: 20_000 });
 }