release: v0.8.0 — line drawing, the wheel's modifiers, and honest history

[vyncint]

Version bump and CHANGELOG move for v0.8.0. No code changes — everything
below landed in #204.

What ships

Added	DEC Special Graphics translated (ESC ( 0, SO/SI) — ncurses borders read as ┌───┐; Terminal::scroll_with with Scroll::{ctrl,alt,shift} and ScrollChord; Screen: PartialEq + Eq; waits name scrolled-off history and point at full_text
Changed	resize is refused once the child has released the terminal, like send
Fixed	wait_frame after resize no longer misses the repaint that answered it; Bitmap::colours linear with a defined tie order; resize documents the resize-then-type trap and that history keeps its captured width; doc links name Error::Size
Security	SECURITY.md names the two unsafe FFI calls instead of claiming there are none

Step 0 of docs/RELEASING.md

The stress workflow ran on the final code commit 103c413: 100 iterations
across ten shards, Linux and macOS, all green (run). It earned
its keep on this branch: the first run found the resize-then-type race in
crossterm's edge-triggered reader (a test fix plus documentation), and the
second found that resize took the frame cursor after sending the SIGWINCH,
so a fast application's acknowledging repaint could be counted as pre-resize
and never offered to wait_frame — a real bug, fixed in #204. Locally on the
final code: 40 iterations each of the input and frames suites and 12 of the
whole workspace at 16 threads, no failure.

Gates on this commit

fmt · clippy -D warnings in all three feature configurations · 361 tests
all-features · 342 no-default-features · 360 decode-only · docs
-D warnings · MSRV 1.85 --locked --all-features · cargo deny ·
cargo-semver-checks against the published 0.7.0: no semver update
required — every API change is additive, and the behaviour change on
resize is listed under Changed.

Dogfood

mossaic, the most demanding consumer, against this tree through a temporary
[patch.crates-io] (never committed): 213 tests, all green, with
cargo tree confirming the path dependency resolved.

Checked by hand

Every constant the docs quote was verified against the code: scrollback,
frames, timings, the reply cap, OSC capture, DCS header, link log and label
bounds, graphics capture, the decode ceiling, the MSRV, and the new charset
scope statement. extract-changelog.sh 0.8.0 on the moved section finds
13 entries, which is what the GitHub Release notes will carry.