fix: remove unused imports and update deprecated typing

Author: alexsteeel

src/ai_sbx/commands/worktree/create.py

@@ -15,7 +15,6 @@
     get_preferred_ide,
     open_ide,
     prompt_ide_selection,
-    save_preferred_ide,
 )
 
 

src/ai_sbx/commands/worktree/utils.py

@@ -9,7 +9,7 @@
 
 from rich.console import Console
 
-from ai_sbx.config import IDE, load_project_config
+from ai_sbx.config import IDE
 from ai_sbx.utils import check_command_exists, logger, prompt_yes_no
 
 

src/ai_sbx/templates.py

@@ -2,15 +2,15 @@
 
 import hashlib
 from pathlib import Path
-from typing import Optional, Tuple
+from typing import Optional
 
 from jinja2 import Environment, FileSystemLoader, Template
 
 from ai_sbx.config import BaseImage, ProjectConfig, get_default_whitelist_domains
 from ai_sbx.utils import logger
 
 
-def generate_unique_subnet(project_name: str) -> Tuple[str, str]:
+def generate_unique_subnet(project_name: str) -> tuple[str, str]:
     """Generate a unique subnet and DNS IP based on project name.
 
     Uses a hash of the project name to generate a deterministic subnet