refactor: 重构代码风格与配置，完善文档与CI

1. 移除冗余导入与简化代码写法
2. 更新coverage配置与pre-commit钩子
3. 重构CI流程，拆分lint/typecheck/test任务
4. 汉化项目文档与注释
5. 修正graphlib导入的类型忽略注释

.pre-commit-config.yaml

@@ -0,0 +1,22 @@
+# prek compatible configuration
+# See https://pre-commit.com for more information
+repos:
+  - repo: https://gitcode.com/gh_mirrors/ru/ruff-pre-commit.git
+    # Ruff version - keep in sync with pyproject.toml
+    rev: v0.15.4
+    hooks:
+      # Run the linter
+      - id: ruff
+        args: [ --fix, --exit-non-zero-on-fix ]
+      # Run the formatter
+      - id: ruff-format
+        args: [ --config=pyproject.toml]
+  - repo: https://gitcode.com/gh_mirrors/pr/pre-commit-hooks.git
+    rev: v5.0.0
+    hooks:
+      - id: check-merge-conflict
+      - id: debug-statements
+      - id: fix-byte-order-marker
+      - id: trailing-whitespace
+        args: [ --markdown-linebreak-ext=md ]
+      - id: end-of-file-fixer