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/tui/test/util/presentation.test.ts

@@ -0,0 +1,8 @@
+import { expect, test } from "bun:test"
+import { sessionEpilogue } from "../../src/util/presentation"
+
+test("formats session continuation summary", () => {
+  const epilogue = sessionEpilogue({ title: "A session", sessionID: "ses_123" })
+  expect(epilogue).toContain("A session")
+  expect(epilogue).toContain("opencode -s ses_123")
+})