ddidderr
b9ac54e794
First cut of the terminal core memory model from ZIG/src/terminal: size, point, style, hyperlink, ref_counted_set, page and PageList. Design (see docs/rewrite/ARCHITECTURE.md decisions 2-4): - Cell/Row are 8-byte u64 wrappers with Zig's exact bit offsets. - Page owns row/cell Vecs plus style set, grapheme and hyperlink maps; Page::layout reproduces Ghostty's byte-size formula on 64-bit Linux so scrollback-limit pruning matches. - PageList keeps nodes in a generation-checked slab with a free list and list-owned tracked pins addressed by handles. This is explicitly partial (docs/rewrite/notes/ghostty-terminal- pagelist.md): 151/202 PageList tests ported; reflow rebuilds a snapshot instead of Zig's incremental ReflowCursor; point<->pin conversion walks from the list head (no active/viewport caches); RefCountedSet doesn't reproduce probe-dependent ID reuse. A follow-up pass finishes parity. Test Plan: - cargo test -p ghostty-terminal (239 tests)