Emoji: OpenEmoji built in and on by default, plus the font installer and inline art

[ralyodio]

Stacked on #95 (OpenIcon), so the two land together. Retarget to main once #95 merges.

The pack. OpenEmoji (every standard emoji, 3,963 in Emoji 18.0) is built in and on by default, next to OpenIcon.

• scripts/generate-emoji.ts writes one table for TypeScript, Go, Python and Rust, about 270 KB each (skin-tone variants stored as key plus base, shortcodes only where they differ from the name, the ten rarest CLDR keywords).
• TypeScript API: emoji(), emojify(":tada:"), emojiSearch("lol"), emojiInfo(), emojiText(), setEmojiMode(), HQTUI_EMOJI=emoji|text.
• Ports: Go Emoji/EmojiIn/Emojify/EmojiSearch, Python emoji/emojify/emoji_search, Rust emoji/emoji_in/emojify/emoji_search.
• Text fallback: an emoticon where one fits (:), <3), otherwise [name]. The Linux console gets text.

Width, in every port. An emoji is now one two-column cell in TS, Go, Rust, Python, Zig and C:

• skin tones join their base (👍🏽 was 4 columns);
• flags pair, and a third regional indicator stands alone;
• subdivision-flag tags join (🏴󠁧󠁢󠁥󠁮󠁧󠁿);
• U+FE0F, keycaps and a skin tone make a text-default pictograph 2 wide (❤️, #️⃣, ☝🏽).

Cell width and measured width share one rule, including when the cluster table is full. The conformance fixtures gain these cases. screen.json/input.json already drift from the generator on openicon-pack itself; that drift is left alone.

hqtui fonts install | status | remove (TypeScript; runs only on that explicit command):

• Downloads the OpenEmoji colour font from the set's release (falling back to the repository, with a clear error if neither has it): CBDT into ~/.local/share/fonts on Linux, sbix into ~/Library/Fonts on macOS.
• Linux fontconfig: OpenEmoji is the emoji family, the other emoji families alias to it, and it is appended to monospace/sans/serif so digits stay text. Then fc-cache.
• Prints the Kitty symbol_map and WezTerm font_with_fallback lines, and on macOS the iTerm2 setting and the Terminal.app caveat.
• Backs up any file it edits as <name>.bak-001.<ext> in ~/.config/hqtui/backups, outside conf.d. remove undoes everything and restores those files.

emojiImage() draws the artwork inline (Kitty graphics in Kitty/Ghostty, iTerm2 images in iTerm2/WezTerm).

• Off unless HQTUI_EMOJI_ART=1; tmux and every other terminal get the character.
• PNG size is 2× the cell's pixel height (from CSI 16 t or HQTUI_CELL_PX), chosen from 128/256/512, cached under XDG_CACHE_HOME.
• Node modules load lazily, so importing hqtui stays side-effect free.

Docs: an Emoji section on hqtui.com/docs and in the package README, including the xterm.js openemoji.css note.

Tests run locally:

• TypeScript: 357 pass under Bun, and emoji plus unicode pass under Node. The one demo failure is this worktree's demo resolving hqtui to an older build; CI installs fresh.
• Go -race, Rust (46 + 17 demo), Python (45), Zig (16), and C ctest with conformance all pass.
• Typecheck and web typecheck are clean.

What was actually verified:

• fonts install ran with real fontconfig in a sandbox home: fc-match gave OpenEmoji for emoji and U+1F525, while the digit 7 stayed DejaVu Sans Mono. remove restored the original.
• No terminal emulator was driven. The Kitty and iTerm2 escape sequences are tested byte by byte, not on screen.

🤖 Generated with Claude Code