fix: safe import for create claude session method in startup hook (#1219)

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Author: rushilpatel0

src/codegen/cli/commands/claude/config/claude_session_hook.py

@@ -11,14 +11,18 @@
 import sys
 from pathlib import Path
 
-from codegen.cli.commands.claude.claude_session_api import create_claude_session
 from codegen.cli.utils.org import resolve_org_id
 
 # Add the codegen CLI to the path so we can import from it
 script_dir = Path(__file__).parent
 codegen_cli_dir = script_dir.parent.parent.parent
 sys.path.insert(0, str(codegen_cli_dir))
 
+try:
+    from codegen.cli.commands.claude.claude_session_api import create_claude_session
+except ImportError:
+    create_claude_session = None
+
 
 def main():
     """Main hook function called by Claude Code."""