fix: resolve CI type annotation issues

- Replaced deprecated typing.List/Dict/Tuple with native list/dict/tuple
- Fixed trailing whitespace issues
- Fixed blank line whitespace issues
- Removed unused variables and imports
- Applied black formatting

tests/test_cli.py

@@ -66,11 +66,15 @@ class TestCLI:
 
         output_file = tmp_path / "output.feature"
 
-        result = runner.invoke(convert, [
-            str(req_file),
-            "--output", str(output_file),
-            "--no-validate",
-        ])
+        result = runner.invoke(
+            convert,
+            [
+                str(req_file),
+                "--output",
+                str(output_file),
+                "--no-validate",
+            ],
+        )
 
         assert result.exit_code == 0
         assert output_file.exists()
@@ -84,11 +88,15 @@ class TestCLI:
         req_file.write_text("As a user, I want to login")
 
         for framework in ["cucumber", "behave", "pytest-bdd"]:
-            result = runner.invoke(convert, [
-                str(req_file),
-                "--framework", framework,
-                "--no-validate",
-            ])
+            result = runner.invoke(
+                convert,
+                [
+                    str(req_file),
+                    "--framework",
+                    framework,
+                    "--no-validate",
+                ],
+            )
 
             assert result.exit_code == 0, f"Failed for framework: {framework}"
 
@@ -111,11 +119,14 @@ class TestCLI:
         req_file = tmp_path / "requirements.txt"
         req_file.write_text("As a user, I want to do something with some data")
 
-        result = runner.invoke(convert, [
-            str(req_file),
-            "--ambiguity-check",
-            "--no-validate",
-        ])
+        result = runner.invoke(
+            convert,
+            [
+                str(req_file),
+                "--ambiguity-check",
+                "--no-validate",
+            ],
+        )
 
         assert result.exit_code == 0