v0.6.0

Added

• DOM prototype chain — full hierarchy: Node → Element → HTMLElement/SVGElement/MathMLElement, plus Document, DocumentFragment, Text, Comment. Constructor globals on globalThis enable instanceof checks
• Symbol.toStringTag — Object.prototype.toString.call(el) returns [object HTMLDivElement] with 40+ HTML tag mappings
• MutationObserver no-op stub — observe(), disconnect(), takeRecords() for SSR compatibility
• document.nodeType (returns 9) and document.nodeName (returns "#document") getters
• Node object identity — same DOM node always returns the same JS wrapper (el.parentNode === el.parentNode, document.body === document.body). Uses DocumentData.node_map with gc_mark to prevent premature collection
• 163 WPT-ported tests — Node, Element, ChildNode, Document APIs adapted from Web Platform Tests

Changed

• tagName/nodeName return uppercase for HTML elements (spec compliant). SVG/MathML elements preserve original case
• textContent = "" removes all children instead of creating an empty text node
• Default max_stack_size bumped to 4 MB (from 1 MB) — Vue mount path needs ~2 MB+
• innerHTML setter uses shared remove_all_children path with node map eviction

Fixed

• Node identity cache leak — innerHTML= and textContent= now recursively evict replaced subtrees from the node map, preventing stale pointers and unbounded map growth
• JS_DupValue leak on OOM — map put failure now frees the duplicated ref
• Removed unused qb_node_set_user/qb_node_get_user C bridge functions, NodePtr type alias, and empty element_finalizer