feat: enhance LocalAgent configuration and UI components

- Updated .env.example to provide clearer configuration instructions and API key setup.
- Removed debug_env.py as it was no longer needed.
- Refactored main.py to streamline application initialization and workspace setup.
- Introduced a new HistoryManager for managing task execution history.
- Enhanced UI components in chat_view.py and task_guide_view.py to improve user interaction and code preview functionality.
- Added loading indicators and improved task history display in the UI.
- Implemented unit tests for history management and intent classification.

tests/test_rule_checker.py

@@ -0,0 +1,160 @@
+"""
+安全检查器单元测试
+"""
+
+import unittest
+import sys
+from pathlib import Path
+
+# 添加项目根目录到路径
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from safety.rule_checker import RuleChecker, check_code_safety
+
+
+class TestRuleChecker(unittest.TestCase):
+    """规则检查器测试"""
+    
+    def setUp(self):
+        self.checker = RuleChecker()
+    
+    # ========== 硬性禁止测试 ==========
+    
+    def test_block_socket_import(self):
+        """测试禁止 socket 模块"""
+        code = "import socket\ns = socket.socket()"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('socket' in v for v in result.violations))
+    
+    def test_block_subprocess_import(self):
+        """测试禁止 subprocess 模块"""
+        code = "import subprocess\nsubprocess.run(['ls'])"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('subprocess' in v for v in result.violations))
+    
+    def test_block_eval(self):
+        """测试禁止 eval"""
+        code = "result = eval('1+1')"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('eval' in v for v in result.violations))
+    
+    def test_block_exec(self):
+        """测试禁止 exec"""
+        code = "exec('print(1)')"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('exec' in v for v in result.violations))
+    
+    def test_block_os_system(self):
+        """测试禁止 os.system"""
+        code = "import os\nos.system('dir')"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('os.system' in v for v in result.violations))
+    
+    def test_block_os_popen(self):
+        """测试禁止 os.popen"""
+        code = "import os\nos.popen('dir')"
+        result = self.checker.check(code)
+        self.assertFalse(result.passed)
+        self.assertTrue(any('os.popen' in v for v in result.violations))
+    
+    # ========== 警告测试 ==========
+    
+    def test_warn_requests_import(self):
+        """测试 requests 模块产生警告"""
+        code = "import requests\nresponse = requests.get('http://example.com')"
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)  # 不应该被阻止
+        self.assertTrue(any('requests' in w for w in result.warnings))
+    
+    def test_warn_os_remove(self):
+        """测试 os.remove 产生警告"""
+        code = "import os\nos.remove('file.txt')"
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)  # 不应该被阻止
+        self.assertTrue(any('os.remove' in w for w in result.warnings))
+    
+    def test_warn_shutil_rmtree(self):
+        """测试 shutil.rmtree 产生警告"""
+        code = "import shutil\nshutil.rmtree('folder')"
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)  # 不应该被阻止
+        self.assertTrue(any('shutil.rmtree' in w for w in result.warnings))
+    
+    # ========== 安全代码测试 ==========
+    
+    def test_safe_file_copy(self):
+        """测试安全的文件复制代码"""
+        code = """
+import shutil
+from pathlib import Path
+
+INPUT_DIR = Path('workspace/input')
+OUTPUT_DIR = Path('workspace/output')
+
+for f in INPUT_DIR.glob('*'):
+    shutil.copy(f, OUTPUT_DIR / f.name)
+"""
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)
+        self.assertEqual(len(result.violations), 0)
+    
+    def test_safe_image_processing(self):
+        """测试安全的图片处理代码"""
+        code = """
+from PIL import Image
+from pathlib import Path
+
+INPUT_DIR = Path('workspace/input')
+OUTPUT_DIR = Path('workspace/output')
+
+for img_path in INPUT_DIR.glob('*.png'):
+    img = Image.open(img_path)
+    img = img.resize((100, 100))
+    img.save(OUTPUT_DIR / img_path.name)
+"""
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)
+        self.assertEqual(len(result.violations), 0)
+    
+    def test_safe_excel_processing(self):
+        """测试安全的 Excel 处理代码"""
+        code = """
+import openpyxl
+from pathlib import Path
+
+INPUT_DIR = Path('workspace/input')
+OUTPUT_DIR = Path('workspace/output')
+
+for xlsx_path in INPUT_DIR.glob('*.xlsx'):
+    wb = openpyxl.load_workbook(xlsx_path)
+    ws = wb.active
+    ws['A1'] = 'Modified'
+    wb.save(OUTPUT_DIR / xlsx_path.name)
+"""
+        result = self.checker.check(code)
+        self.assertTrue(result.passed)
+        self.assertEqual(len(result.violations), 0)
+
+
+class TestCheckCodeSafety(unittest.TestCase):
+    """便捷函数测试"""
+    
+    def test_convenience_function(self):
+        """测试便捷函数"""
+        result = check_code_safety("print('hello')")
+        self.assertTrue(result.passed)
+    
+    def test_convenience_function_block(self):
+        """测试便捷函数阻止危险代码"""
+        result = check_code_safety("import socket")
+        self.assertFalse(result.passed)
+
+
+if __name__ == '__main__':
+    unittest.main()
+