cleanup: extract cachedParse helper for parse-result reuse#586
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WrapHtml, WrapInnerHtml, and eachNodeHtml each open-coded the same lookup-or-parse-and-store sequence against a map[string][]*html.Node keyed by the context node's name. Extract that 4-line sequence into a tiny cachedParseHtmlWithContext(cache, htmlStr, context) helper; each call site becomes a linear, closure-free loop and the only duplicated bit (the cache lookup) lives in one place.
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WrapHtml, WrapInnerHtml, and eachNodeHtml each open-coded the same lookup-or-parse-and-store sequence against a map[string][]*html.Node keyed by the context node's name. Extract that 4-line sequence into a tiny cachedParseHtmlWithContext(cache, htmlStr, context) helper; each call site becomes a linear, closure-free loop and the only duplicated bit (the cache lookup) lives in one place.