chore: add just development shortcuts

Author: Itsusinn

README.md

@@ -17,6 +17,18 @@ npm run dev --prefix config-generator
 
 打开 `http://127.0.0.1:8080/`。无需启动 Python 或 Zensical。支持配对生成、服务端或客户端单独生成、多用户、三种证书模式、SOCKS5 认证、重连、0-RTT 和 TCP/UDP 转发；“配置详解”可按枚举分支浏览 YAML，并通过悬浮或键盘聚焦查看逐项说明。
 
+安装了 [just](https://just.systems/) 时，可用仓库根目录的快捷命令：
+
+```sh
+just setup   # 首次安装锁定依赖
+just dev     # 编译 WASM 并启动生成器
+just dev-ui  # 仅修改 Svelte/CSS 时跳过 WASM 编译
+just wasm    # Vite 运行期间重编译 Rust/XML
+just check   # Rust、WASM 与 Svelte 检查
+```
+
+运行 `just` 可查看构建、预览和浏览器回归等全部命令。
+
 独立构建：
 
 ```sh

justfile

@@ -0,0 +1,57 @@
+# Use the native shell on Windows; Unix keeps just's default `sh` shell.
+
+set windows-shell := ["powershell.exe", "-NoLogo", "-NoProfile", "-Command"]
+
+# Show the available repository tasks.
+default:
+    @just --list
+
+# Install locked Python and Node.js dependencies.
+setup:
+    uv sync --locked
+    npm ci --prefix config-generator
+    npm ci --prefix tests/config-generator
+
+# Compile WASM, then start the config generator at http://127.0.0.1:8080/.
+dev:
+    npm run dev --prefix config-generator
+
+# Start Vite without rebuilding WASM (for Svelte/CSS-only changes).
+dev-ui:
+    npm exec --prefix config-generator -- vite --host 127.0.0.1 --port 8080
+
+# Rebuild WASM after Rust or XML changes while Vite is running.
+wasm:
+    npm run wasm --prefix config-generator
+
+# Start the documentation development server.
+docs:
+    uv run --locked zensical serve
+
+# Run formatting, native/WASM Rust checks, tests, and Svelte checks.
+check:
+    cargo +nightly fmt --all --check
+    cargo test --workspace --locked
+    cargo clippy --workspace --all-targets --locked -- -D warnings
+    cargo clippy --target wasm32-unknown-unknown --lib --locked -- -D warnings
+    npm run check --prefix config-generator
+
+# Build the documentation and standalone generator under site/.
+build:
+    uv run --locked python scripts/build-site.py
+
+# Build and validate the combined site.
+site-check: build
+    uv run --locked python tests/config-generator/check-site.py
+
+# Run browser regression tests against a temporary server for config-generator/dist/.
+browser:
+    uv run --locked python tests/config-generator/run-browser.py
+
+# Run browser regression tests against the combined deployment-prefix build.
+browser-site: build
+    uv run --locked python tests/config-generator/run-browser.py --directory site/config-generator --prefix /tuic/config-generator/
+
+# Build, validate, and serve the combined site preview.
+preview: site-check
+    uv run --locked python tests/config-generator/preview-server.py