fix: add type annotations to cli.py

regex_humanizer/cli.py

@@ -1,10 +1,11 @@
 """Main CLI module for Regex Humanizer."""
 
 import json as json_module
+from typing import List
 
 import click
 
-from .parser import parse_regex, ParseError
+from .parser import ASTNode, ParseError
 from .converter import convert_to_english, convert_to_english_verbose
 from .examples import generate_examples
 from .flavors import (
@@ -72,7 +73,7 @@ def explain(pattern: str, flavor: str, verbose: bool, output_format: str):
                 click.echo(f"Flavor: {result['flavor']}")
                 click.echo(f"\nDescription:\n{result['description']}")
                 if result.get('structure'):
-                    click.echo(f"\nStructure:")
+                    click.echo("\nStructure:")
                     for item in result['structure']:
                         click.echo(f"  - {item}")
         else:
@@ -87,7 +88,7 @@ def explain(pattern: str, flavor: str, verbose: bool, output_format: str):
 
         warnings = get_compatibility_warnings(pattern, flavor)
         if warnings:
-            click.echo(f"\nCompatibility warnings:")
+            click.echo("\nCompatibility warnings:")
             for w in warnings:
                 click.echo(f"  [{w.severity.upper()}] {w.feature}: {w.message}")
 
@@ -150,7 +151,7 @@ def generate(pattern: str, flavor: str, count: int, output_format: str):
         else:
             click.echo(f"\nPattern: {pattern}")
             click.echo(f"Flavor: {flavor}")
-            click.echo(f"\nMatching examples:")
+            click.echo("\nMatching examples:")
             for i, example in enumerate(examples, 1):
                 click.echo(f"  {i}. {example}")
 
@@ -198,7 +199,7 @@ def from_english(description: str, flavor: str, output_format: str):
             click.echo(f"Flavor: {result['flavor']}")
 
             if result.get('warnings'):
-                click.echo(f"\nWarnings:")
+                click.echo("\nWarnings:")
                 for w in result['warnings']:
                     click.echo(f"  - {w}")
 
@@ -226,7 +227,7 @@ def build(flavor: str):
     click.echo(f"Flavor: {flavor}")
     click.echo("Enter 'quit' to exit, 'back' to go back, 'done' when finished.\n")
 
-    pattern_parts = []
+    pattern_parts: List[ASTNode] = []
 
     while True:
         current_pattern = "".join(p.to_regex() if hasattr(p, 'to_regex') else str(p) for p in pattern_parts)