fix: Remove claude.service and fix network settings

- Remove cfg/claude.service (claude should be run manually, not as systemd service)
- Fix bind mount: change %h to /root for proper path resolution
- Fix network: change to VirtualEthernet=no for internet access
- Update install.sh to create proper nspawn configs for all containers
- Create /root/.config/syui/ai directory in install.sh

Working flow:
- aios OS boot -> ai user login
- machinectl login workspace
- manually run 'claude' command

cfg/nspawn/aios.nspawn

@@ -8,9 +8,8 @@ ResolvConf=copy-host
 
 [Files]
 # Bind mount shared memory directory
-# Host: ~/.config/syui/ai -> Container: /root/.config/syui/ai
-Bind=%h/.config/syui/ai:/root/.config/syui/ai
+# Host: /root/.config/syui/ai -> Container: /root/.config/syui/ai
+Bind=/root/.config/syui/ai:/root/.config/syui/ai
 
 [Network]
-Private=yes
-VirtualEthernet=yes
+VirtualEthernet=no