fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/opencode/test/fixture/db.ts

@@ -0,0 +1,11 @@
+import { rm } from "fs/promises"
+import { Database } from "@opencode-ai/core/database/database"
+import { disposeAllInstances } from "./fixture"
+
+export async function resetDatabase() {
+  await disposeAllInstances().catch(() => undefined)
+  const dbPath = Database.path()
+  await rm(dbPath, { force: true }).catch(() => undefined)
+  await rm(`${dbPath}-wal`, { force: true }).catch(() => undefined)
+  await rm(`${dbPath}-shm`, { force: true }).catch(() => undefined)
+}