docs: document HiDrive mount and symbolic links in shell environment

Updated CLAUDE.md to document .zlogin configuration which:
- Mounts HiDrive storage at /mnt/hidrive
- Creates symbolic links for Documents, Pictures, Videos, and Music directories
  from HiDrive user path to home directory
- Cleaned up .zprofile (removed empty content)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -68,6 +68,7 @@ The `.gitignore` uses an inverted pattern (ignore everything, then selectively a
 - **Shell**: Zsh with Oh-My-Zsh framework
 - **Theme**: Powerlevel10k (`.p10k.zsh`)
 - **Plugins**: git, pm2, gh, docker, language-specific plugins, zsh-autosuggestions, zsh-syntax-highlighting
+- **Login Configuration**: `.zlogin` mounts HiDrive storage and creates symbolic links for Documents, Pictures, Videos, and Music directories from `/mnt/hidrive/users/valknar/` to `$HOME/`
 
 ## Common Commands