fix(web/ui): resolve padding and dialog layout issues from audit

- Remove conflicting .dialog/.dialog-body rules from utilities.css
- Fix live-session sidebar alignment and padding
- Wrap ProjectDialog, RepositoryCreateDialog, WorkspacesPage modals in .dialog-header/.dialog-body
- Migrate SessionsPage dirty-delete modal from .modal-* to .dialog-*
- Add padding to .project-card
- Fix session-card-actions border token (var(--border))
- Remove duplicate .dialog-actions rule in global.css
- Add pb-20 bottom clearance to ConfigProfile/ToolType editor scroll containers
- Add .card-md padding to ErrorState

apps/web/src/styles/global.css

@@ -381,6 +381,7 @@
 	flex-direction: column;
 	align-items: stretch;
 	gap: 0;
+	padding: var(--space-4);
 }
 
 .project-info h3 {
@@ -677,12 +678,6 @@
 	line-height: var(--line-height-normal);
 }
 
-.dialog-actions {
-	display: flex;
-	justify-content: flex-end;
-	gap: 0.6rem;
-}
-
 .keys-list {
 	display: flex;
 	flex-direction: column;