jQuery DataTables references the standard CharacterData interface which
was undefined in obscura's DOM environment, causing ReferenceError and
empty page renders.
- Add CharacterData class extending Node with data/length/substringData/
appendData/insertData/deleteData/replaceData
- Make Text and Comment extend CharacterData instead of Node
- Update _wrap() to create proper Text/Comment instances by nodeType
- Add create_comment_node op for Document.createComment()
- Fix set_text_content to handle Comment node mutations
Fixes#72
Co-authored-by: KuaaMU <[email protected]>
Fixes#1: replace unwrap() panics in run_multi_worker_serve with match on the Result.
Fixes#2: route /json round-robin via worker_port instead of hardcoded port+1.
Fixes#3: return 502 Bad Gateway when a worker is unreachable instead of silently dropping the connection.
Fixes#5: thread --stealth through start_with_options -> CdpContext -> BrowserContext::with_options so the flag actually has an effect in serve mode (was let _ before). Log message now reflects the actual capability based on the stealth cargo feature being compiled in.
Fixes#15: try/catch the parentNode assignment in the attachShadow polyfill so it doesn't throw a TypeError against the read-only Node.parentNode getter (Cloudflare Turnstile triggers this path).
