fix: remove local used outside functions in docker-entrypoint

[b00y0h]

Summary

Remove three local keyword usages at top-level scope in build/docker-entrypoint (lines 86, 109, 141) that cause the container to fail on startup.

Problem

The entrypoint script has set -euo pipefail and uses local outside of any function. Bash rejects this:

/usr/local/bin/docker-entrypoint: line 141: local: can only be used in a function

This causes the container to exit immediately after a successful build, making ClaudeBox unusable once profiles that trigger Python venv setup are enabled.

Fix

Replace local with plain variable assignments. These variables (wait_count, python_packages) are already deeply nested in conditionals and don't need function-scoped locality.

Fixes #65

Summary by Sourcery

Bug Fixes:

• Remove invalid uses of the bash local keyword at top-level scope in the docker entrypoint script that caused startup failures.

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