- Rename app title to SUB-ALIGATOR (header, page titles, exports, README)
- Add dark amber-terminal theme with a header toggle, persisted in localStorage
- Add pool deletion (soft delete): allocations are kept in history and
block the address space again when the same or an overlapping pool is
re-added (re-enable on exact CIDR match, re-attach contained allocations)
- Reject new pools that overlap an enabled pool
- Move Home link into the page header, keep other links in the footer
- Load app.js globally via base template, add theme.js (CSP-safe, no inline JS)
