v0.9.5 — RC2 local plugin installation

DSHX 0.9.5 adds local bundle installation for official DeepSeek Harness 0.2.0-rc.2.

• dshx plugin add /absolute/package --profile desktop --port <current-port> installs a built local bundle through the current Host’s authenticated public plugin manager. npm publication is not required; the package must declare dsh.bundle.patch.
• Verify the exact local link, bundle selection and unchanged Host identity. An uncertain install joins the same request instead of submitting twice. Creator+ plain plugins retain their fixed-tool route.
• Activation plans now recognize RC2 profile HMR and client graph synchronization. Unknown runtime capability remains undecided; observe the current page and verify actual behavior.
• Agent skills, CLI guidance and release instructions include local installation synchronization.

Validation: macOS official RC2 published Web runtime, isolated Home, local bundle installation, same PID, same page without reload, button interaction, duplicate refusal and zero page errors. DSHX regression/native tests and Creator+ 0.3.12 bridge/install checks were run. Desktop routing and fixed-tool compatibility are covered by regression tests; this release does not claim a fresh native Desktop UI run.