v0.41.3

Patch Changes

• Copy readable LaTeX source for block math authored as $$…$$ or ```math.

  Copying block math from the WYSIWYG editor now writes readable LaTeX source ($$\nformula\n$$) to the text/html clipboard flavor for math authored as $$…$$ or a ```math fence, matching slash-menu-authored math. Previously only slash-menu math got the source fallback while dollar- and fence-authored math (the dominant on-disk forms) pasted a non-portable KaTeX style clone into rich destinations like Gmail, Google Docs, and Notion. Block math that was previously dropped from the clipboard entirely in some editor states is now included as the same readable source too.

• Fix GitHub sign-in failing with "Sign-in stream ended without confirmation" when the connection to the local server blips (#803).

  The sign-in stream between the browser and the local OpenKnowledge server sat completely idle from the moment the device code appeared until authorization finished, which is exactly what security software, VPN proxies, and browser tab-backgrounding cut off. Worse, that disconnect terminated the sign-in itself, so authorizing on github.com afterwards stored nothing.

  Sign-in now survives those blips: the stream is kept alive with a periodic keepalive, a dropped connection no longer cancels the sign-in in progress, and the app reconnects to pick up a sign-in that completed while it was disconnected. Closing the dialog still cancels immediately. The countdown also shows the code's real expiry (about 15 minutes) instead of claiming it expired after 2.