[AlexAndBear]

Description

• Name width: the collaborator list item used grid-cols-2, so member and collaborator names were cut off at half the row. The name column now takes the remaining space (grid-cols-[1fr_auto], min-w-0) and truncates at the icons on the right.
• Full name: the name has a title with the full display name, like the admin member lists.

Before	After

Related Issue

• Fixes Member and collaborator names are cut off at half the sidebar width #3921

How Has This Been Tested?

• test environment: unit tests (Vitest), browser tests (Playwright) against a local OpenCloud
• test case 1: unit: the name shows the full display name as title
• test case 2: browser: file share panel and space members panel with long user and group names, with expiration and shared-via icons, at 1440, 1024 and mobile width; role dropdown; short names unchanged

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)