chore: 恢复旧布局基线（迁移改动丢失后重建，apps/packages 布局暂存）

apps/desktop/src-tauri/Cargo.toml

@@ -4,11 +4,16 @@ version = "0.1.0"
 description = "OpsxDB Tauri desktop shell"
 authors = ["OpsxDB"]
 edition = "2021"
+default-run = "OpsxDB"
 
 [lib]
 name = "opsxdb_desktop_lib"
 crate-type = ["staticlib", "cdylib", "rlib"]
 
+[[bin]]
+name = "OpsxDB"
+path = "src/main.rs"
+
 [build-dependencies]
 tauri-build = { version = "2", features = [] }