chore(release): release Buzz Desktop version 0.4.1

[wpfleger96]

Buzz Desktop release v0.4.1

Changes since v0.4.0:

• fix(desktop): surface codex config-parse failures and -32603 internal errors clearly (#1745) (ec3762552)
• fix(desktop): fix workspace rail badge disappearance and persist mark-as-unread (#1747) (e8df6ba69)
• chore(desktop): remove container-only npm-preflight E2E harness (#1749) (9895b4d39)
• fix(desktop): preflight npm prefix writability in doctor installs (#1732) (58aee8f91)
• fix(workspaces): exclude muted channels and unfollowed threads from rail unread badge (#1738) (ea1c75b0d)
• feat(desktop): add explicit Edit avatar CTA in agent instance edit dialog (#1736) (26966aace)
• fix(observer): order system prompt below current-session divider on restart (#1734) (67a2d047e)

To release: merge this PR. The tag and build will happen automatically.