feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- System prompt injection for routing
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/app/e2e/utils/waits.ts

@@ -0,0 +1,11 @@
+import { expect, type Locator, type Page } from "@playwright/test"
+
+export const APP_READY_TIMEOUT = 30_000
+
+export async function expectAppVisible(locator: Locator) {
+  await expect(locator).toBeVisible({ timeout: APP_READY_TIMEOUT })
+}
+
+export async function expectSessionTitle(page: Page, title: string) {
+  await expectAppVisible(page.getByRole("heading", { name: title }))
+}