[devin-ai-integration]

Summary

Adds typographic substitution on the typed-text path of LiveEditor (smart quotes + em dash):

• "/' become curly by context: opens at line start or after space/(/[/{/—/–, closes otherwise; after a letter or digit ' is always ’ (apostrophes: don’t, d’água).
• A second - folds -- into —. Lines that are only hyphens/spaces (--- rules, frontmatter fences) or contain | (table rows) stay literal.
• Backspace right at the end of a substitution restores the straight characters (” → ", — → --) — also the manual escape hatch.
• Never inside inline code, fenced blocks or frontmatter: smart::literal_at(&Analysis, off) is the single extensible forbidden-context check. Analysis now records metadata ranges for minus_metadata/plus_metadata; math ($…$, PR Add LaTeX math ($…$ / $$…$$): Unicode editor rendering + MathML export #60) plugs into the same function at merge.
• Paste and programmatic inserts untouched — the substitution only runs in replace_text_in_range for single typed chars.
• Undo unaffected: substitutions go through self.edit, so “/— undo as one step (undoing — restores the first -).
• New smart_quotes setting (on by default) persisted in store.rs, with a toggle at the end of Settings → Editor ("Smart quotes" / "Aspas tipográficas").

Core logic is pure and unit-tested: smart::substitute(line, before, typed, on, literal) -> Option<Subst { text, orig, back }> — 6 tests cover open/close, apostrophe, fold, rule/table rejection, literal contexts and the off switch.

GUI-verified (macOS release build)

• pt-BR + en phrases produce “olá”, ‘respondeu’, “don’t”, it’s and em dashes — byte-checked in the saved file.
• ---, a | b -- c, `code -- "x"` and a fenced -- "y" and 'z' all stay literal.
• Backspace reverts — → -- and ” → ".
• Toggle off → --/"/' stay straight; persists smart_quotes = off and re-enables live.
• ⌘Z removes a substituted quote as one character.

Link to Devin session: https://app.devin.ai/sessions/4c6b312f7f904f8093d1bf890a1cf788
Open in Devin Desktop: https://app.devin.ai/desktop/session/4c6b312f7f904f8093d1bf890a1cf788?variant=devin
Requested by: @horizzon3507

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[devin-ai-integration]

Independent GUI verification on the release build (macOS, isolated config, real keystrokes via System Events; all claims byte-checked in the autosaved .md):

Passed: "x" -- y → “x” — y; don't/'x' → don’t/‘x’; --- rule and a | b -- c stay literal; fenced block and closed inline code stay literal (`xx -- "q"`); frontmatter --/" literal while body curls; Backspace restores — → -- and ” → "; ⌘Z undoes each substitution in one step; Settings → Editor "Smart quotes" toggle disables live, persists smart_quotes = off, survives relaunch, and re-enables live (smart_quotes = on).

Edge found and fixed: linear-typed `tail -- "z"` used to produce `tail — “z”` — the chars substituted while the span was still unclosed. Fixed in 1993033: literal_at now also treats an unmatched backtick run in the line prefix as literal, so `fix -- "w"` typed start-to-finish stays straight while prose after the closing backtick still curls.

Settings toggle evidence

Written by Devin