* refactor: resolve oxlint correctness findings without behavior changes
- Snapshot iterations that mutate their collection with Array.from()
instead of a spread (live childNodes, self-removing disposers, a Set
extended inside its own loop).
- Drop empty spread fallbacks, redundant regex escapes, Boolean() casts
inside negations, a rethrow-only try/catch and statement ternaries.
- Use startsWith/endsWith for anchored literal checks in the extension.
- List U+FE0F explicitly in the mobile attachment emoji class; the
matched set is unchanged.
- Fix the WeChat copy fixture, where \oint in a template literal lost its
backslash and the block formula never exercised \oint.
- Document the intentional control-character regexes (filename
sanitizing and input validation), the throwing provider stream test,
Astro's generated type reference and the mobile auto-sync finally
block with narrow inline exceptions.
* ci: run oxlint correctness rules on pull requests
Pin oxlint 1.88.0 and enable only its correctness category across apps/
and packages/, excluding build output, vendored code and the iOS app.
Findings are errors and the script passes --deny-warnings, so CI fails
on any finding. no-unused-vars stays off until unused code is removed
in a dedicated pass.