release v2.4.0

Minor release. Adds live tail inside expanded Bash activity cards
(T-325) and double-tap-modifier shortcuts with double-Shift quick-open
across all keymap presets (T-341); each spawned subagent now gets its
own activity card (T-342). Carries a large stability sweep — PTY fd
and process leaks, IPC framing, settings durability, UTF-8 decoding
across chunk boundaries, transactional extension lifecycle — plus two
security fixes: the MCP HTTP server now requires a per-start auth
token (T-362) and editor.open/save are workspace-confined (T-363).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/licenses.yaml

@@ -39,7 +39,7 @@ self:
   # Auto-synced from pubspec.yaml `version:` by `make gen-build-info`
   # (runs implicitly on every build/run/test). Don't hand-edit; bump
   # pubspec instead.
-  version: "2.3.3"
+  version: "2.4.0"
   homepage: https://github.com/postmeridiem/clide
   license: MIT
   license_file: assets/LICENSE