refactor: migrate private domain to encrypted file and improve configuration

- Replace interactive prompt with encrypted domain.txt.age file
- Move encryption config to top level in .chezmoi.toml.tmpl
- Add platform-specific shell configuration for chezmoi cd command
- Remove unused Perl PATH configuration from commonrc
- Add commit-staged slash command for git workflow
- Enable nushell banner and improve init_pre.ts logging
- Clean up deprecated installation scripts (ovpn, gitconfig)
- Update hishtory server configuration to use encrypted domain

home/dot_claude/commands/commit-staged.md

@@ -0,0 +1,17 @@
+---
+allowed-tools: Bash(git status:*), Bash(git diff:*), Bash(git log:*), Bash(git commit:*)
+description: Create a git commit (staged files only)
+---
+
+## Context
+
+- Current git status: !`git status`
+- Current git diff (staged changes only): !`git diff --cached`
+- Current branch: !`git branch --show-current`
+- Recent commits: !`git log --oneline -10`
+
+## Your task
+
+Based on the above staged changes, create a single git commit.
+
+You have the capability to call multiple tools in a single response. Create the commit using a single message. Do not stage any additional files. Do not use any other tools or do anything else. Do not send any other text or messages besides these tool calls.