Terminal families: add popular emulators + audit capability tables

[mstrobel]

Fleshes out terminal-family identification and the non-negotiated capability tables, driven by two research passes (12 unidentified terminals + a full audit of the families we already claim).

New families (with detection wired into the classifier)

Warp, VS Code (vscode / VSCODE_PID), Hyper, Wave Terminal (waveterm / WAVETERM), mintty (XTVERSION), Contour (XTVERSION / TERM=contour), st (st-256color), Termux (TERMUX_VERSION), PuTTY (TERM=putty), and Zellij (ZELLIJ). VTE_VERSION resolves the indistinguishable VTE family (gnome-terminal, GNOME Console/kgx, Black Box, Tilix, xfce4-terminal) to the GnomeTerminal representative.

Zellij is flagged InsideMultiplexer but excluded from MultiplexerPassthrough — it re-renders with no generic escape passthrough (unlike tmux, where passthrough corrupts output).

Audit corrections to existing families (verified against vendor source/docs)

• OSC 52 read — drop Rio (no clipboard_load), iTerm2 (write-only), tmux (does not reflect the query); add mintty (3.8.2+) + Contour.
• SGR-pixels mouse — drop Rio (maps only 1006); add Contour/Warp/VS Code.
• Pixel-size query — drop Windows Terminal (answers neither) and Alacritty (14t-only; our cell probe is 16t); add Rio/xterm/Termux/Wave.
• OSC 22 pointer shape — add iTerm2/Warp/mintty (not WezTerm — PR unmerged; not xterm — X cursor-font names).
• DECRQM — drop GNU Screen + Konsole (no reply path); add VS Code/Hyper/Contour/Termux/mintty. Side benefit: the runtime 2026 re-verification no longer wrongly disables sync output on Konsole (which never answered DECRQM).
• Styling — split the bundled extended bool into independent Hyperlinks / StyledUnderline / Overline (they did not co-land per terminal). VTE was wrongly excluded from all three; the blanket Overline=false was wrong (true for Ghostty, WezTerm, Windows Terminal, Konsole, VTE).
• Graphics — WezTerm ships Kitty graphics too; Rio ships Sixel.
• Cursor — real bug fix: the comment excluded Apple Terminal from DECSCUSR but modern did not, so it claimed shape+blink control it lacks. rxvt-unicode (9.22+) and mlterm (3.8.2+) do implement DECSCUSR — no longer excluded. Termux excluded from OSC 12.
• Kitty keyboard — add Alacritty (0.13)/Rio/Warp/Contour.
• Sync output — add Rio/Contour/Warp/mintty/VS Code.
• Truecolor — add every new family + the orphaned Tabby (== Terminus, renamed 2021).

Also fixed two pre-existing classifier bugs: TERM=iTerm returned Rio, and a duplicated ITERM_SESSION_ID check.

ReliableWideGlyphs stays universally false by policy — the pre-paint/re-CUP defense always runs (untouched).

Notes / deferrals

Items the research flagged UNCERTAIN were handled conservatively: Konsole's kitty-keyboard membership is kept (unverified either way) with a code comment; Warp/Contour/Zellij exact XTVERSION strings and VTE's XTVERSION support want a live-terminal spot-check. PuTTY is nearly unfingerprintable (best-effort TERM=putty only).

Tests

34 targeted identification + capability tests (TerminalFamilyExpansionTests); full Core suite 996 green.

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