fix: resolve CI/CD workflow and linting issues

src/mcp_server_cli/tools/git_tools.py

@@ -1,12 +1,12 @@
 """Git integration tools for MCP Server CLI."""
 
 import os
-from pathlib import Path
-from typing import Any, Dict, List, Optional
 import subprocess
+from pathlib import Path
+from typing import Any, Dict, Optional
 
+from mcp_server_cli.models import ToolParameter, ToolSchema
 from mcp_server_cli.tools.base import ToolBase, ToolResult
-from mcp_server_cli.models import ToolSchema, ToolParameter
 
 
 class GitTools(ToolBase):
@@ -146,7 +146,7 @@ class GitTools(ToolBase):
 
     async def _add(self, repo: Path, pattern: str) -> ToolResult:
         """Stage files."""
-        output = await self._run_git(repo, "add", pattern)
+        await self._run_git(repo, "add", pattern)
         return ToolResult(success=True, output=f"Staged: {pattern}")
 
     async def _checkout(self, repo: Path, branch: str) -> ToolResult:
@@ -154,7 +154,7 @@ class GitTools(ToolBase):
         if not branch:
             return ToolResult(success=False, output="", error="Branch name is required")
 
-        output = await self._run_git(repo, "checkout", branch)
+        await self._run_git(repo, "checkout", branch)
         return ToolResult(success=True, output=f"Switched to: {branch}")