feat: add "Installed" filter to Roo Marketplace (#7007)

* feat: add "Installed" filter to Roo Marketplace

- Added installed boolean filter to ViewState interface
- Implemented UI checkbox for "Show installed only" filter
- Updated filterItems method to filter by installation status
- Added translation strings for the new filter
- Updated tests to include the new filter property

Fixes #7004

* fix: add missing translations for "Installed" filter in marketplace

- Added "filters.installed.label" and "filters.installed.description" keys
- Updated all backend marketplace.json files (src/i18n/locales/*/marketplace.json)
- Updated all frontend marketplace.json files (webview-ui/src/i18n/locales/*/marketplace.json)
- All translation checks now pass successfully

* fix: improve code quality for installed filter feature

- Replace plain HTML checkbox with UI library Checkbox component for consistency
- Add proper TypeScript typing for installedMetadata (MarketplaceInstalledMetadata)
- Optimize filterItems method to avoid unnecessary object copying
- Remove dead code for subcomponent filtering

* refactor: improve installed filter UI and functionality

- Replace checkbox with dropdown for better UX
- Place dropdown inline with search field for better layout
- Add three filter options: All Items, Installed Only, Not Installed
- Update filter logic to handle all three states
- Improve translation labels to clarify it's a filter
- Optimize filterItems method for better performance
- Add proper TypeScript types throughout

* fix: ensure both filter dropdowns have matching height

- Set both Select and Button components to h-7 for visual consistency
- Installation status dropdown and tags dropdown now have identical height
- Improved visual alignment for better UX

* chore: remove redundant useEffect in MarketplaceListView to prevent re-render loop; rely on state manager handleMessage sync

* i18n: update tri-state Installed filter translations across all locales

- Replace checkbox-based installed keys with dropdown keys:
  { label, all, installed, notInstalled }
- Updated both frontend and backend marketplace.json files for all non-English locales
- Ensures translation completeness for CI check

* i18n: change Installed option text to 'Installed' (remove 'Only') across all locales (frontend + backend)

---------

Co-authored-by: Roo Code <[email protected]>
Co-authored-by: daniel-lxs <[email protected]>

Author: 3 people

src/i18n/locales/ca/marketplace.json

@@ -38,6 +38,12 @@
 			"noResults": "No tags found.",
 			"selected": "Showing items with any of the selected tags"
 		},
+		"installed": {
+			"label": "Filter by status",
+			"all": "All Items",
+			"installed": "Installed",
+			"notInstalled": "Not Installed"
+		},
 		"title": "Marketplace"
 	},
 	"done": "Done",