Maintains a WDC-marked block inside the system hosts file so WDC-managed domains resolve to 127.0.0.1.

• Reads C:\Windows\System32\drivers\etc\hosts (or /etc/hosts).
• Parses entries, preserving non-WDC lines verbatim.
• Rewrites a marker-delimited section (# BEGIN NKS WebDev Console … / # END NKS WebDev Console) containing one line per managed site.
• Returns 403 when run without elevated privileges (Windows).
• Backs up the original to timestamped .bak in ~/.wdc/backups/hosts/ before every write.

Mounted by host daemon at /api/hosts/*:

• GET /hosts — return parsed entries with origin tag (wdc | external).
• POST /hosts/apply — rewrite the WDC block.
• POST /hosts/backup — force a backup now.
• POST /hosts/restore — upload a .bak to overwrite the live file (size-clamped to 10 MiB to prevent memory exhaustion — F58 fix).

• /tools/hosts page with editable table and staging area so edits don't hit disk until the user confirms.

• MAMP hosts entries with tab separators + multi-hostname lines may render as garbled cells — parser hardening tracked as F82.