feat: allow deleting projects with sessions and add styled confirmation modal

- Add force delete option to delete projects with existing sessions
- Add styled confirmation modal with session count warning
- Add deletingProjects state to show loading indicator during deletion
- Delete associated Codex sessions when deleting a project (with limit: 0)
- Delete associated Cursor sessions directory when deleting a project
- Add fallback to extractProjectDirectory when projectPath undefined
- Use finally block for deletingProjects cleanup
- Add fallback name in delete modal

src/utils/api.js

@@ -79,8 +79,8 @@ export const api = {
     authenticatedFetch(`/api/codex/sessions/${sessionId}`, {
       method: 'DELETE',
     }),
-  deleteProject: (projectName) =>
-    authenticatedFetch(`/api/projects/${projectName}`, {
+  deleteProject: (projectName, force = false) =>
+    authenticatedFetch(`/api/projects/${projectName}${force ? '?force=true' : ''}`, {
       method: 'DELETE',
     }),
   createProject: (path) =>