@claude - Update Mattermost mobile documentation (or the relevant “Manage channel members” help content) to reflect PR #9301:

• State that on mobile, you can now manage your own roles/membership from the Manage Channel Members screen (where previously you could only manage other users).
• If the doc set distinguishes roles (e.g., channel admin/manager), clarify this applies when you have permission to manage members.
• Keep the update mobile-specific and workflow-focused (no API or backend speculation).

Do NOT:

• Add any claims about server configuration, feature flags, or defaults (none are evidenced in the PR diff).
• Expand scope to desktop/web behavior unless separately evidenced elsewhere.