TUI Plugin Sharing 5 - polish remote plugin catalog rows (#26705)

This is the final plugin sharing PR in the 5-PR stack. It applies the
remaining TUI polish for remote plugin catalog rows and tabs:
admin-disabled plugins now read as blocked/view-only instead of looking
toggleable, admin-installed/default-installed plugins count and sort
like installed plugins, plugin search matches richer metadata, and an
empty successful `Shared with me` section stays hidden.

- Admin-disabled rows use a blocked marker, show `Disabled`, and keep
Enter-only detail behavior without a toggle hint.
- Admin-installed/default-installed plugins show as installed in counts,
ordering, tabs, and detail copy.
- Plugin search now matches descriptions and keywords in addition to
existing row metadata.
- Successful-empty `Shared with me` tabs are hidden, while loading,
error, workspace-empty, and real shared-plugin states remain visible.
- Updates coverage in
`plugins_popup_snapshot_shows_all_marketplaces_and_sorts_installed_then_name`,
`plugins_popup_admin_disabled_installed_plugin_has_no_toggle_hint`,
`plugins_popup_search_matches_plugin_descriptions`, and
`plugins_popup_remote_section_fallback_states_snapshot`.
- Updates snapshots `plugins_popup_curated_marketplace` and
`plugins_popup_empty_shared_section_hidden`.


<img width="2034" height="106" alt="image"
src="https://github.com/user-attachments/assets/3f9a57e1-edd8-4e6c-b0b0-9f632a3c9529"
/>
<img width="2038" height="380" alt="image"
src="https://github.com/user-attachments/assets/45a47491-3381-4846-a13d-496bc0051d42"
/>

codex-rs/tui/src/bottom_pane/mod.rs

@@ -190,6 +190,8 @@ use crate::status_indicator_widget::StatusDetailsCapitalization;
 use crate::status_indicator_widget::StatusIndicatorWidget;
 pub(crate) use experimental_features_view::ExperimentalFeatureItem;
 pub(crate) use experimental_features_view::ExperimentalFeaturesView;
+pub(crate) use list_selection_view::SELECTION_TOGGLE_BLOCKED_PREFIX;
+pub(crate) use list_selection_view::SELECTION_TOGGLE_UNAVAILABLE_PREFIX;
 pub(crate) use list_selection_view::SelectionAction;
 pub(crate) use list_selection_view::SelectionItem;