feat: 支持4种OpenBridge主题切换，统一项目命名和端口配置

- 添加 OpenBridge 四种主题切换 (day/bright/dusk/night)
- 实现 DJB2 hash 算法生成项目专用端口 (14323)
- 统一项目名称为 openbridge-token-usage-viewer
- 更新 Tauri 应用名称、sidecar 命名和窗口标题
- 开发服务器端口从 3000 改为基于项目名称的稳定端口

src-tauri/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
-name = "app-desktop"
+name = "openbridge-token-usage-viewer"
 version = "0.1.0"
-description = "A Tauri App"
+description = "OpenBridge Token Usage Viewer"
 authors = ["imbytecat"]
 edition = "2021"
 
@@ -11,7 +11,7 @@ edition = "2021"
 # The `_lib` suffix may seem redundant but it is necessary
 # to make the lib name unique and wouldn't conflict with the bin name.
 # This seems to be only an issue on Windows, see https://github.com/rust-lang/cargo/issues/8519
-name = "app_desktop_lib"
+name = "openbridge_token_usage_viewer_lib"
 crate-type = ["staticlib", "cdylib", "rlib"]
 
 [build-dependencies]