Document yadm dotfiles setup completion

Added comprehensive documentation of the yadm dotfiles management setup:

- README.md: Updated goals and status to reflect completed dotfiles setup
- yadm-setup-notes.md: Complete process documentation including:
  * Manual merge strategy preserving Arch Linux functionality
  * File-by-file configuration changes and optimizations
  * Submodule management and troubleshooting
  * Arch-specific adjustments (disabled linuxbrew, performance tuning)
  * Development environment highlights and security features
- arch-linux-setup.md: Marked development environment tasks as completed

The dotfiles setup phase is now fully documented with both process
details and configuration highlights for future reference.

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

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

README.md

@@ -6,6 +6,7 @@ Setting up a personal homelab using a ThinkPad laptop running Arch Linux to move
 ## Goals
 - [x] Linux installation (Arch Linux on ThinkPad)
 - [x] SSH remote access (hostname: homelab)
+- [x] Dotfiles and development environment setup
 - [ ] Network domain setup
 - [ ] Self-hosted cloud storage (ownCloud/Nextcloud)
 - [ ] Self-hosted git repository (Gitea/Forgejo/GitLab)
@@ -14,6 +15,8 @@ Setting up a personal homelab using a ThinkPad laptop running Arch Linux to move
 ## Hardware
 - **Main Server**: ThinkPad laptop
 - **Development**: Windows PC with WSL (for AI experimentation)
+- **Android tablet**: Not good for long-term work but can be useful for short SSH sessions
+  - Runs Manjaro in a VM, same OS like the laptop
 
 ## Inspiration & Resources
 - PewDiePie homelab setup video: https://www.youtube.com/watch?v=u_Lxkt50xOg
@@ -22,4 +25,14 @@ Setting up a personal homelab using a ThinkPad laptop running Arch Linux to move
 ## Current Status
 - ✅ Arch Linux installed on ThinkPad
 - ✅ SSH access configured (accessible as `homelab`)
-- Next: Set up dotfiles and begin service planning
+- ✅ Dotfiles management with yadm configured and merged
+- ✅ Development environment setup completed
+- Next: Network domain setup and self-hosted services
+
+## Documentation & TODO Lists
+- [x] **[arch-install-notes.md](arch-install-notes.md)** - Installation process and core system setup
+- [ ] **[arch-linux-setup.md](arch-linux-setup.md)** - General Arch Linux configuration tasks
+- [ ] **[yadm-setup-notes.md](yadm-setup-notes.md)** - Dotfiles management and development environment setup
+- [ ] **[ssh-setup-guide.md](ssh-setup-guide.md)** - SSH configuration and security hardening
+- [ ] **[network-planning.md](network-planning.md)** - Network setup, DNS, and security planning
+- [ ] **[self-hosted-services.md](self-hosted-services.md)** - Planning for git hosting and cloud storage