refactor: 重命名 build.ts → compile.ts，统一脚本与文件命名

- compile 脚本调用 compile.ts，消除与 build 的歧义
- desktop turbo.json 添加 build outputs 缓存配置

apps/desktop/turbo.json

@@ -1,5 +1,9 @@
 {
   "$schema": "../../node_modules/turbo/schema.json",
   "extends": ["//"],
-  "tasks": {}
+  "tasks": {
+    "build": {
+      "outputs": ["out/**"]
+    }
+  }
 }

apps/server/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "build": "vite build",
-    "compile": "bun build.ts",
+    "compile": "bun compile.ts",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",
     "db:push": "drizzle-kit push",