refactor: 用 Bun 原生 define 替换 cli.tsx 中的 globalThis 注入

- 删除 cli.tsx 顶部的 globalThis.MACRO / BUILD_* / feature polyfill
- 新增 scripts/defines.ts 作为 MACRO define 映射的单一来源
- 新增 scripts/dev.ts，通过 bun run -d 在转译时注入 MACRO 常量
- build.ts 引用 getMacroDefines() 实现构建时内联
- 清理 global.d.ts (移除 BUILD_*, MACRO 函数声明)
- 55 个 MACRO 消费文件零改动

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/defines.ts

@@ -0,0 +1,18 @@
+/**
+ * Shared MACRO define map used by both dev.ts (runtime -d flags)
+ * and build.ts (Bun.build define option).
+ *
+ * Each value is a JSON-stringified expression that replaces the
+ * corresponding MACRO.* identifier at transpile / bundle time.
+ */
+export function getMacroDefines(): Record<string, string> {
+    return {
+        "MACRO.VERSION": JSON.stringify("2.1.888"),
+        "MACRO.BUILD_TIME": JSON.stringify(new Date().toISOString()),
+        "MACRO.FEEDBACK_CHANNEL": JSON.stringify(""),
+        "MACRO.ISSUES_EXPLAINER": JSON.stringify(""),
+        "MACRO.NATIVE_PACKAGE_URL": JSON.stringify(""),
+        "MACRO.PACKAGE_URL": JSON.stringify(""),
+        "MACRO.VERSION_CHANGELOG": JSON.stringify(""),
+    };
+}

scripts/dev.ts

@@ -0,0 +1,21 @@
+#!/usr/bin/env bun
+/**
+ * Dev entrypoint — launches cli.tsx with MACRO.* defines injected
+ * via Bun's -d flag (bunfig.toml [define] doesn't propagate to
+ * dynamically imported modules at runtime).
+ */
+import { getMacroDefines } from "./defines.ts";
+
+const defines = getMacroDefines();
+
+const defineArgs = Object.entries(defines).flatMap(([k, v]) => [
+    "-d",
+    `${k}:${v}`,
+]);
+
+const result = Bun.spawnSync(
+    ["bun", "run", ...defineArgs, "src/entrypoints/cli.tsx", ...process.argv.slice(2)],
+    { stdio: ["inherit", "inherit", "inherit"] },
+);
+
+process.exit(result.exitCode ?? 0);