Update task completion status

Mark completed tasks from network troubleshooting session:
- SSH security hardening (port 2222, dual interface issue solved)
- Router port forwarding configuration
- TTY colors fix completed
- Reorganize TODO structure, remove completed high priority section

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

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

TODO.md

@@ -1,15 +1,11 @@
 # Homelab TODO List
 
-## High Priority
-- [x] Reorganize documentation structure *(completed - new file structure)*
-- [ ] Configure WireGuard VPN server for secure remote access
-- [ ] Set up firewall rules and port forwarding
-
 ## Network & Security
 - [x] DuckDNS dynamic DNS setup *(completed - ak-homelab.duckdns.org)*
 - [x] SSH security hardening *(documented in network-security.md)*
+  - [x] Figure out why laptop IP changes: Different eth ports have different MAC?
+- [x] Router port forwarding configuration
 - [ ] WireGuard VPN server configuration
-- [ ] Router port forwarding configuration
 - [ ] UFW firewall setup and rules
 - [ ] fail2ban for intrusion prevention
 
@@ -20,7 +16,7 @@
 - [x] Dotfiles management with yadm *(completed)*
 - [x] Temperature monitoring in tmux *(completed)*
 - [x] Zsh history sharing between sessions *(completed)*
-- [ ] Fix TTY colors for better code readability
+- [x] Fix TTY colors for better code readability
 - [ ] Configure automatic system backups
 
 ## Desktop & Applications