feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/core/test/pty/input.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect } from "bun:test"
+import { Effect } from "effect"
+import { handlePtyInput } from "@opencode-ai/core/pty/input"
+import { it } from "../lib/effect"
+
+describe("pty websocket input", () => {
+  it.effect("does not forward invalid binary frames to the PTY handler", () =>
+    Effect.gen(function* () {
+      const messages: Array<string | ArrayBuffer> = []
+      const handler = { onMessage: (message: string | ArrayBuffer) => messages.push(message) }
+
+      yield* handlePtyInput(handler, "ready")
+      yield* handlePtyInput(handler, new Uint8Array([0xff, 0xfe, 0xfd]))
+      yield* handlePtyInput(handler, new TextEncoder().encode("hello"))
+
+      expect(messages).toEqual(["ready", "hello"])
+    }),
+  )
+})