* fix(pdf-server): slice bytes before onDataRange to avoid detached buffer
PDF.js transfers the ArrayBuffer to its worker via postMessage, detaching
it in the main thread. When the same range is re-requested (common on
iOS/WKWebView under memory pressure during scroll/zoom/navigate), the
cached Uint8Array now wraps a detached buffer and onDataRange throws
'Buffer is already detached'.
Fix: pass result.bytes.slice() so the rangeCache entry stays valid.
* test(e2e): update pdf-annotations assertion for new display_pdf prompt text
The 91880a6d prompt rewrite changed the interact-enabled result text from
'Displaying PDF (viewUUID: ...)' to 'PDF opened. viewUUID: ...'. The e2e
test was still asserting the old string.
e8a4ea5f89