v0.43.1

Patch release fixing the TUI sidebar in v0.43.0.

Fixed

TUI sidebar failed to load silently in v0.43.0. The published @cortexkit/aft-bridge
package declared @cortexkit/subc-client as a devDependency while its compiled output imports
it directly, so the sidebar (which resolves the published package under the OpenCode host) hit
an unresolvable module and never rendered. It is now a regular dependency, and the package
validation gate enforces the correct direction so this cannot regress. Thanks to vizid on
Discord for the precise diagnosis.

No other changes: this release is v0.43.0 plus the dependency fix.