Fix CI workflow: Add tree-sitter CLI installation and fix linting errors

vibeguard/cli/commands/analyze.py

@@ -1,6 +1,5 @@
 """Analyze command for VibeGuard CLI."""
 
-import os
 from pathlib import Path
 from typing import Any
 
@@ -64,7 +63,7 @@ def analyze(
         file_issues = analyze_file(file_path, pattern_manager, config)
         issues.extend(file_issues)
 
-    console.print(f"\n[summary]Analysis Complete[/summary]")
+    console.print("\n[summary]Analysis Complete[/summary]")
     console.print(f"Files scanned: {len(files)}")
     console.print(f"Issues found: {len(issues)}\n")
 
@@ -80,8 +79,6 @@ def analyze(
     console.print()
 
     if output_json:
-        import json
-
         console.print_json(data={"issues": issues, "summary": severity_counts})
     elif output_html:
         generator = ReportGenerator()
@@ -100,8 +97,6 @@ def analyze_file(
     path: Path, pattern_manager: PatternManager, config: Config
 ) -> list[dict[str, Any]]:
     """Analyze a single file for anti-patterns."""
-    from vibeguard.analyzers.base import BaseAnalyzer
-
     issues: list[dict[str, Any]] = []
 
     analyzer = AnalyzerFactory.get_analyzer(path)