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* 🔢 fix: Prevent "approximately" tildes from rendering as markdown subscript `remark-supersub` splits text nodes on every `~`; an even number of tildes wraps the in-between text in `<sub>`. "Approximately" usage like `~50% ... ~10%` pairs up and subscripts everything between the two tildes. A backslash escape cannot fix this: micromark resolves `\~` back to a bare `~` before supersub runs. Instead, `preprocessTilde` swaps approximation tildes (a `~` prefixing a number, not attached to a word) for the Unicode tilde operator `∼` (U+223C), which renders as a tilde but is not split by supersub. Mirrors `preprocessLaTeX`: early return, single regex pass, code-region skipping. Genuine subscripts (`H~2~O`, `a ~2~ b`), strikethrough, escaped tildes, and home paths are preserved. * 🔢 fix: Harden tilde preprocessing — escaped tildes, URLs, math, MarkdownLite Addresses Codex review findings: - Convert escaped approximation tildes too (`\~50%`): markdown decodes `\~` to `~` before supersub, so the escape still pairs into a subscript. - Anchor matches to a prose boundary (start / whitespace / open bracket) and exclude `\(`/`\[`/`\{`, so URL path tildes (`/~50`) and math delimiters (`$~10$`, `$$~10$$`, `\(~10\)`) are left untouched. - Apply preprocessTilde in MarkdownLite (user messages + search/subagent/ code-analysis displays), which also enables remark-supersub. * 🔧 refactor: Neutralize approximation tildes via remark plugin, not raw-text Replaces the string-level preprocessTilde with `remarkApproxTilde`, a remark plugin that rewrites "approximately" tildes (`~50%` → `∼`) on parsed text nodes before remark-supersub runs. Because it operates on the AST, code spans, fenced code blocks (backtick *and* ~~~), inline code with any backtick count, link destinations, and math spans are structurally excluded — none are `text` nodes — resolving every raw-text edge case Codex flagged without region-scanning heuristics. Escaped `\~` is covered for free (markdown decodes it before the plugin runs). - New client/src/utils/tilde.ts: `normalizeApproxTildes` (pure, per-text-node) + `remarkApproxTilde` plugin. - Wired into both renderers (markdownConfig + MarkdownLite), before supersub. - latex.ts / Markdown.tsx reverted to original; preprocessTilde removed. - tilde.spec.ts: pure-function cases + a hand-built-tree test proving code, math, and link URLs are untouched while text (incl. link text) is converted. * 🔧 fix: Cover quoted approximations and the markdown error-boundary fallback - Broaden the boundary to any non-word, non-tilde char (`(?<![\w~])`), which now includes quotes — `"~50%" ... "~10%"` was still subscripting because `"` was not a recognized prose boundary. Safe to widen because the plugin runs on text nodes, so code / links / math / URLs are already excluded structurally (the earlier allowlist only existed to dodge URL paths in raw text). - Add remarkApproxTilde to MarkdownErrorBoundary's fallback remark pipeline so the fix holds when a render error falls back to the minimal renderer. * 🔧 fix: Preserve autolink URL labels when normalizing tildes A GFM autolink renders the URL as its own label (a text node equal to the href), so the broadened boundary was rewriting `~50` inside a displayed URL to `∼50` even though the href stayed correct. Skip text nodes that are an autolink's label (value matches the destination, allowing for the implied scheme on www/email links), so the visible URL is preserved verbatim. Regular link labels (prose) are still normalized. Note: a single URL containing two `~<digit>` segments is still subscripted by remark-supersub itself — that's pre-existing behavior (reproduces with no plugin) and out of scope here. * 🔧 refactor: Drop unist-util-visit runtime dep from tilde plugin Replace the `unist-util-visit` import with a small self-contained recursive walk over text nodes (tracking the parent for the autolink-label check). This removes reliance on a transitively-hoisted runtime package — addressing the dependency- hygiene concern without adding a dependency or churning the lockfile. The type-only `unist` import remains (erased at build, no runtime resolution). Behavior is unchanged; verified against nested emphasis and list/paragraph trees. |
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