fix: resolve shebang and executable file issues

- Remove shebangs from Python scripts (run via uv, not directly)
- Mark shell scripts as executable (run directly via curl/bash)
- Add check-shebang-scripts-are-executable to pre-commit config

Author: alex-feel

.pre-commit-config.yaml

@@ -29,6 +29,10 @@ repos:
       description: Trims trailing whitespace in non-Python text files
       exclude: ^.*\.(pyi?|py)$
 
+    - id: check-shebang-scripts-are-executable
+      name: Check shebang scripts
+      description: Check that text files with a shebang are executable
+
 - repo: local
   hooks:
     - id: markdownlint

scripts/install-claude.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 """
 Cross-platform Claude Code installer.
 Handles Git Bash (Windows), Node.js, and Claude Code CLI installation.

scripts/linux/install-claude-linux.sh

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 """
 Cross-platform Python environment setup for Claude Code.
 Downloads and configures Python development tools for Claude Code.