[Romaine] 撳複製撳鈕个時節，保留斷行

[Aiuanyu]

This change modifies the copyRomanizerResult function in js/romanizer.js to ensure that line breaks are preserved when the user copies the conversion results. It replaces <br> elements with newlines in the cloned DOM node and updates the whitespace cleaning regex to only collapse horizontal whitespace, preserving existing \n characters.

Fixes #223

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PR created automatically by Jules for task 5232764111664409179 started by @Aiuanyu

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[claude]

Code review for PR 224 - see full review in next comment

[claude]

Overall: Clean, well-targeted fix. Approach is correct, changes are minimal. What is done well: (1) Correct approach - Cloning the DOM and replacing br elements with newlines before reading textContent is the right way to preserve line breaks. (2) Regex fix is accurate - the pattern /[^\S\r\n]+/g correctly collapses only horizontal whitespace while leaving newlines intact, better than the previous /\s+/g which erased newlines. (3) Minimal footprint - only touches what is needed. Edge cases to consider: (1) Multiple consecutive br tags will produce multiple newlines (blank lines). If the romanizer can emit adjacent br elements, consider capping: textToCopy.replace(/\n{3,}/g, '\n\n'). Minor polish, not a blocker. (2) .trim() strips leading/trailing newlines - generally correct for clipboard content, just confirming it is intentional. (3) The \r in the regex is a safe no-op since textContent returns \n not \r\n in the DOM. Verdict: Correctly addresses issue 223. No security, performance, or correctness concerns. Recommend approval.

[gemini-code-assist]

Code Review

This pull request updates the text copying logic in js/romanizer.js to preserve line breaks. It converts
elements to newlines and adjusts the whitespace cleaning regex to target only horizontal whitespace. I have no feedback to provide.