v0.5.0

Features

• Session notes: a markdown notes panel per session, stored as one .md file per session
  in thel's config dir, so notes are editable and greppable outside the app.
• Keyboard copy mode: Ctrl+Shift+Space puts a cursor on the buffer, vi motions move it,
  Space starts a selection, y/Enter copies. Scrollback is reachable without a mouse.
• OSC 8 hyperlinks: links in output are clickable, the target shows while the pointer
  is on it, and the context menu offers Copy URL for the link it was opened on.
• OSC 52 clipboard: programs (including over ssh) can put text on the system clipboard,
  in background tabs too. Writes only, clipboard reads are refused, and replayed history
  is stripped.
• Window session restore: every profile window left open at quit reopens on the next
  launch, instead of always a single window.
• Closing a window can now ask: keep terminals running, stop them, or ask each time.
  Cancelling the prompt cancels the close. Choose the behavior in the Settings dialog.
• New terminals from the last dir: New terminals open where the last one was (also changeable in Settings).

Fixes

• Ctrl+Tab cycles panes, replacing the bracket keys.
• Links only open on a deliberate click, and failures to open now say so instead of
  failing silently.
• Renaming stays open when something else grabs focus.
• The app menu survives OS-drawn window decorations.
• Idle sessions are no longer killed when the daemon is off.
• Alt-screen state is restored correctly when replaying a snapshot.
• Switching profiles twice at once no longer opens two windows.