🖼️ style: Improve Marketplace & Sharing Dialog UI

feat: Enhance CategoryTabs and Marketplace components for better responsiveness and navigation

feat: Refactor AgentCard and AgentGrid components for improved layout and accessibility

feat: Implement animated category transitions in AgentMarketplace and update NewChat component layout

feat: Refactor UI components for improved styling and accessibility in sharing dialogs

refactor: remove GenericManagePermissionsDialog and GrantAccessDialog components

- Deleted GenericManagePermissionsDialog and GrantAccessDialog components to streamline sharing functionality.
- Updated ManagePermissionsDialog to utilize AccessRolesPicker directly.
- Introduced UnifiedPeopleSearch for improved people selection experience.
- Enhanced PublicSharingToggle with InfoHoverCard for better user guidance.
- Adjusted AgentPanel to change error status to warning for duplicate agent versions.
- Updated translations to include new keys for search and access management.

feat: Add responsive design for SelectedPrincipalsList and improve layout in GenericGrantAccessDialog

feat: Enhance styling in SelectedPrincipalsList and SearchPicker components for improved UI consistency

feat: Improve PublicSharingToggle component with enhanced styling and accessibility features

feat: Introduce InfoHoverCard component and refactor enums for better organization

feat: Implement infinite scroll for agent grids and enhance performance

- Added `useInfiniteScroll` hook to manage infinite scrolling behavior in agent grids.
- Integrated infinite scroll functionality into `AgentGrid` and `VirtualizedAgentGrid` components.
- Updated `AgentMarketplace` to pass the scroll container to the agent grid components.
- Refactored loading indicators to show a spinner instead of a "Load More" button.
- Created `VirtualizedAgentGrid` component for optimized rendering of agent cards using virtualization.
- Added performance tests for `VirtualizedAgentGrid` to ensure efficient handling of large datasets.
- Updated translations to include new messages for end-of-results scenarios.

chore: Remove unused permission-related UI localization keys

ci: Update Agent model tests to handle duplicate support_contact updates

- Modified tests to ensure that updating an agent with the same support_contact does not create a new version and returns successfully.
- Enhanced verification for partial changes in support_contact, confirming no new version is created when content remains the same.

chore: Address ESLint, clean up unused imports and improve prop definitions in various components

ci: fix tests

ci: update tests

chore: remove unused search localization keys

client/src/locales/en/translation.json

@@ -696,19 +696,12 @@
   "com_ui_copy_url_to_clipboard": "Copy URL to clipboard",
   "com_ui_agent_url_copied": "Agent URL copied to clipboard",
   "com_ui_search_people_placeholder": "Search for people or groups by name or email",
-  "com_ui_permission_level": "Permission Level",
-  "com_ui_grant_access": "Grant Access",
-  "com_ui_granting": "Granting...",
-  "com_ui_search_users_groups": "Search Users and Groups",
-  "com_ui_search_users_groups_roles": "Search Users, Groups, and Roles",
-  "com_ui_search_users": "Search Users",
-  "com_ui_search_groups": "Search Groups",
-  "com_ui_search_roles": "Search Roles",
   "com_ui_search_default_placeholder": "Search by name or email (min 2 chars)",
   "com_ui_user": "User",
   "com_ui_group": "Group",
   "com_ui_role": "Role",
   "com_ui_search_above_to_add": "Search above to add users or groups",
+  "com_ui_search_above_to_add_people": "Search above to add people",
   "com_ui_search_above_to_add_all": "Search above to add users, groups, or roles",
   "com_ui_azure_ad": "Entra ID",
   "com_ui_remove_user": "Remove {{0}}",
@@ -1245,10 +1238,9 @@
   "com_agents_empty_state_heading": "No agents found",
   "com_agents_search_empty_heading": "No search results",
   "com_agents_no_description": "No description available",
-  "com_agents_none_in_category": "No agents found in this category",
-  "com_agents_no_results": "No agents found. Try another search term.",
   "com_agents_results_for": "Results for '{{query}}'",
   "com_agents_marketplace_subtitle": "Discover and use powerful AI agents to enhance your workflows and productivity",
+  "com_agents_no_more_results": "You've reached the end of the results",
   "com_ui_agent_name_is_required": "Agent name is required",
   "com_agents_missing_name": "Please type in a name before creating an agent."
 }