Motivation

• Provide an easy, in-UI way to apply project templates from MADE_HOME/.made/templates/ to existing repositories using the same look-and-feel as other repo actions.
• Implement backend support to enumerate available templates and copy template contents into a repository with overwrite semantics.
• Keep UI simple and consistent by reusing the shared Modal component and adding a small transparent diamond icon for the action.

Description

• Added a new DiamondIcon SVG component used as a top-right action on each repository panel to open the template modal.
• Added a template modal in RepositoriesPage that lists templates as blue primary buttons and supports close via the existing modal ×, shows success or error alerts, and prevents closing while a template is applying.
• Extended the frontend API (useApi) with listRepositoryTemplates and applyRepositoryTemplate methods and added a TemplateApplyResponse type.
• Implemented backend functions list_repository_templates() and apply_repository_template(repo_name, template_name) in repository_service.py which list template folders under MADE_HOME/.made/templates/ and recursively copy template files into the target repository using shutil.copytree / shutil.copy2.
• Added backend API endpoints GET /api/repositories/templates and POST /api/repositories/{name}/templates/apply with input validation and mapped errors to appropriate HTTP responses.
• Added unit tests for the new backend functions and API endpoints and a frontend test exercising the modal open/list/apply flow, plus minimal CSS for layout.

Testing

• Ran repository service unit tests with python -m pytest packages/pybackend/tests/unit/test_repository_service.py and all tests passed (17 passed).
• Attempted to run combined backend API tests with python -m pytest packages/pybackend/tests/unit/test_repository_service.py packages/pybackend/tests/unit/test_api.py but collection failed in this environment because the fastapi package is not installed, causing an import error for test_api.py.
• Ran the frontend unit test for the repositories page with npm --prefix packages/frontend run test -- RepositoriesPage.test.tsx and the Vitest run passed (1 file, 3 tests passed).

Codex Task