feat: move plugin catalog filters into a dialog

[marekdano]

Closes #6242.

Summary

Moves the plugin catalog's filters (Hook, Tags) from an inline popover into a dialog, matching the pattern already used on the server catalog page. Rebased on top of #24, which landed on main while this was in progress and removed the Mode filter — that decision is preserved here (no Mode section was reintroduced).

• Replaced the single-select Hook <Select> dropdown and the tag checkbox popover with a Dialog containing two sections (Hooks, Tags), each with an All/Select radio and a multi-select checkbox grid — reusing the exact draft/apply pattern from CatalogFiltersDialog (CatalogToolbar.tsx).
• hook is now multi-select (string[], OR semantics) and uses repeatable URL query params (?hook=a&hook=b), matching how tags already worked. Both sections commit in a single navigation when "Add filters" is clicked, instead of applying immediately per field.
• Added an orange icon badge (bg-selection) around the Filter icon in both the plugins and server catalog dialog headers, matching the Figma design.
• Fixed a horizontal-overflow bug in the Hooks section: long snake_case hook identifiers (e.g. http_auth_resolve_user) have no natural break point, which forced the CSS multi-column layout wider than the dialog and pushed a horizontal scrollbar onto the whole dialog. Fixed with min-w-0 + overflow-wrap: anywhere on the option labels, plus dropping the Hooks section to 3 columns instead of 4 (maxColumns prop) since its labels run longer than Tags.
• Consolidated i18n keys that turned out identical across plugins.json and mcpServer.json:
  • common.addFilters ("Add filters") replaces the duplicatedplugins.catalog.addFilters / mcpServer.catalog.addFilters.
  • common.selectOption ("Select...") replaces 5 duplicated select* keys (selectHooks, selectTags, selectCategories, selectProviders) — safe because the ES/PT-BR translations are grammatically invariant across sections.
  • Left the all*Option ("All") keys per-section, since ES/PT-BR need gender agreement (Todos vs Todas) that a shared key can't express correctly.
  • Removed now-dead keys left over from the old popover UI and the earlier Mode-filter work: allHooks, allTags (old naming), modes, allModesOption.

Files changed

• src/components/plugins/PluginToolbar.tsx — dialog-based filter UI (Hooks + Tags)
• src/components/server-catalog/CatalogToolbar.tsx — icon badge, shared i18n keys
• src/pages/Plugins.tsx — multi-select filter state, single-commit apply
• src/pages/Plugins.test.tsx — updated to drive the dialog (open → select → apply); added a regression test asserting no Modes section is offered
• src/i18n/locales/{en-US,es-ES,pt-BR}/{common,plugins,mcpServer}.json

Screenshots

Plugins page

Server catalog page

[gcgoncalves]

Nice! 👍