fix(seedgo): resolve ruff lint errors in test files

- Remove sys.path.insert() blocks from test files (E402) — package is
  installed via pip install -e . so path manipulation is unnecessary
- Move import importlib.util and import subprocess to top of file (E402)
- Remove unused sys import from test_seedgo_core.py (F401)
- Fix undefined _src_path reference in test_seedgo_cli.py (F821)
- Remove unused result variable assignment in TestCLIInit (F841)
- Remove extraneous f prefix from f-string in cli.py (F541)

All 249 tests pass. Zero ruff violations.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/seedgo/cli.py

@@ -159,7 +159,7 @@ def _cmd_init(args: argparse.Namespace) -> None:
 
     try:
         config_path = create_default_config(project_root, profile=profile)
-        print(f"Seed Go initialized.")
+        print("Seed Go initialized.")
         print(f"  Config: {config_path}")
         print(f"  Plugins: {str(Path(config_path).parent / 'plugins')}")
         if profile:

tests/test_seedgo_cli.py

@@ -14,19 +14,12 @@ sys.path fix ensures src/ is importable when running from the repo root:
 """
 
 import json
+import subprocess
 import sys
 from pathlib import Path
 
 import pytest
 
-# ---------------------------------------------------------------------------
-# sys.path fix — must appear before any seedgo imports
-# ---------------------------------------------------------------------------
-
-_src_path = str(Path(__file__).parent.parent / "src")
-if _src_path not in sys.path:
-    sys.path.insert(0, _src_path)
-
 from seedgo.models import CheckItem, CheckResult, Severity
 from seedgo.runner import (
     _file_matches_types,
@@ -791,18 +784,16 @@ class TestReportGitHub:
 # ---------------------------------------------------------------------------
 
 
-import subprocess
-
 
 class TestCLIInit:
     def test_init_creates_config_file(self, tmp_path):
-        result = subprocess.run(
+        subprocess.run(
             [sys.executable, "-m", "seedgo.cli"],
             input="",
             capture_output=True,
             text=True,
             cwd=str(tmp_path),
-            env={**__import__("os").environ, "PYTHONPATH": _src_path},
+            env={**__import__("os").environ, "PYTHONPATH": str(Path(__file__).parent.parent / "src")},
         )
         # The above runs cli as module — we need the main() entry
         # Actually test by calling main() directly via runner script

tests/test_seedgo_core.py

@@ -12,17 +12,10 @@ Target: 85%+ coverage of src/seedgo/ core modules.
 """
 
 import json
-import sys
 from pathlib import Path
 
 import pytest
 
-# Ensure src/ is on the path when running from the repo root
-_repo_root = Path(__file__).parent.parent
-_src_path = str(_repo_root / "src")
-if _src_path not in sys.path:
-    sys.path.insert(0, _src_path)
-
 from seedgo.models import CheckItem, CheckResult, Severity
 from seedgo.config import (
     DEFAULT_CONFIG,

tests/test_seedgo_plugins.py

@@ -17,19 +17,12 @@ Each plugin has:
 Uses tmp_path for isolated test directories.
 """
 
-import sys
+import importlib.util
 from pathlib import Path
 
 import pytest
 
-# Ensure src/ is on the path when running from the repo root
 _repo_root = Path(__file__).parent.parent
-_src_path = str(_repo_root / "src")
-if _src_path not in sys.path:
-    sys.path.insert(0, _src_path)
-
-# Import plugin modules directly for unit testing
-import importlib.util
 
 def _load_plugin(plugin_filename: str | Path):
     """Load a plugin module by filename from the plugins directory."""