Enhance Linux and macOS development station configurations:

- Add user management and Oh My Zsh settings
- Update service scripts to use Zsh
- Include new packages and environment variables
- Modify Terraform configuration for upstream services

ansible/roles/linux_dev_station/templates/start-opencode.sh.j2

@@ -1,7 +1,16 @@
-#!/usr/bin/env bash
+#!/usr/bin/env zsh
 
 set -euo pipefail
 
+# Suppress ZLE warnings from Oh My Zsh (no TTY in systemd)
+setopt NOZLE 2>/dev/null || true
+
+# Override TMPDIR — /tmp is noexec on Fedora, Bun needs an executable temp
+export TMPDIR="{{ linux_dev_station_service_home }}/.cache/tmp"
+mkdir -p "$TMPDIR"
+# Clean stale files older than 7 days
+find "$TMPDIR" -mindepth 1 -atime +7 -delete 2>/dev/null || true
+
 {% if linux_dev_station_ssh_agent_enabled | bool %}
 source "{{ linux_dev_station_scripts_dir }}/ssh-agent-start.sh"
 {% endif %}