DSH plug-in collection

Key features

• dsh.client — declares the browser-side injection (inject lists the client package names it depends on
• A Codex-style message navigator rail: a vertical tick rail on the conversation transcript with one tick per user message, active highlight, stepped hover, and smooth jump.
• Replaces the official Models settings page (fork of ui-settings-models) to add per-model dropdown multi-selects for vision (input) and thinking strength (reasoningEfforts) — the two controls the stock page punts to settings.yaml.
• Adds a Marketplace tab to Settings → Plugins.
• dsh.bundle.patch — points at cordis.patch.yml, so installing the package automatically inserts its loader row into the profile.