fix(client): adopt the renamed client plugin manifest key
Master moved the browser-half declaration from a top-level `dshClient` to
`dsh.client`, and the new package still carried the old key. The Loader row
resolved, the host half applied, and the bundle built — the browser simply
never mounted the entry, so the session header rendered no task control at all
while `ctx.tasks` held a running task. Nothing reported it; the web e2e is
what caught it.
Also carried the merged tree onto master's current package rules: the release
manifest shape (version, repository, workspace-protocol peers, no `private`)
and `@deepseek-ai/cordis` in place of the old `cordis` specifier, plus the
connection handle the locale plugin's settings scope now reads in tests.
Yichen Jiang