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/tui/test/prompt/part.test.ts

@@ -0,0 +1,53 @@
+import { describe, expect, test } from "bun:test"
+import { expandTrackedPastedText, stripPromptPartIDs } from "../../src/prompt/part"
+
+describe("prompt part", () => {
+  test("strips persisted IDs from reused parts", () => {
+    expect(
+      stripPromptPartIDs({
+        id: "prt_old",
+        sessionID: "ses_old",
+        messageID: "msg_old",
+        type: "file" as const,
+        mime: "image/png",
+        filename: "tiny.png",
+        url: "data:image/png;base64,abc",
+      }),
+    ).toEqual({
+      type: "file",
+      mime: "image/png",
+      filename: "tiny.png",
+      url: "data:image/png;base64,abc",
+    })
+  })
+
+  test("preserves wide characters around pasted text", () => {
+    const marker = "[Pasted ~3 lines]"
+    const prefix = "你好你好\n"
+
+    expect(
+      expandTrackedPastedText(prefix + marker + "\n阿斯顿法国红酒看来", [
+        {
+          start: Bun.stringWidth("你好你好") + 1,
+          end: Bun.stringWidth("你好你好") + 1 + Bun.stringWidth(marker),
+          text: "public:\n\tvoid ExecuteTask();\nprivate:",
+        },
+      ]),
+    ).toBe("你好你好\npublic:\n\tvoid ExecuteTask();\nprivate:\n阿斯顿法国红酒看来")
+  })
+
+  test("only expands the tracked placeholder occurrence", () => {
+    const marker = "[Pasted ~3 lines]"
+    const prefix = `keep ${marker} then `
+
+    expect(
+      expandTrackedPastedText(prefix + marker + " tail", [
+        {
+          start: Bun.stringWidth(prefix),
+          end: Bun.stringWidth(prefix + marker),
+          text: "alpha\nbeta\ngamma",
+        },
+      ]),
+    ).toBe(`keep ${marker} then alpha\nbeta\ngamma tail`)
+  })
+})