chore: bump to v0.1.59

[alexkroman]

Bumps Blurt to v0.1.59 (build 58). No code changes since v0.1.58: this release exists to test the real Sparkle update path, from the shipped v0.1.58 on the /latest feed to a newer build.

Release notes (shown in Sparkle's update window)

• Check that automatic updates work: nothing else changes in this version

Test after the gate

In the installed v0.1.58, choose Check for Updates…. Check that:

• it offers 0.1.59 with the note above
• it installs and relaunches as 0.1.59 (Settings → Advanced → Updates)
• dictating into another app still pastes (the Accessibility permission survives)

The bump check fails because pushing the notes commit re-triggers release-bump's ancestor guard. That's expected, and bump isn't a required check.

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