Feature request: Workspace / team-visible notes across users

Problem

Blinko supports multiple users, comments, and sharing, but notes/blinkos/todos are isolated per account by default. This makes multi-user deployment less useful for families or small teams.

The current share flow seems to be note-by-note, and public links/RSS are not the same as an internal workspace.

Expected behavior

Add a workspace/team mode where users can use their own accounts, create their own blinkos/notes/todos, and optionally make them visible to other users in the same instance.

Suggested design

1. Add workspace/team visibility:

   • Private: only me
   • Workspace: all users in this instance / selected workspace
   • Shared with specific users
   • Public link

2. Keep authorship:

   • Show original author/avatar
   • Comments and notifications work across users

3. Permission options:

   • View only
   • Comment
   • Edit
   • Admin/owner

4. Optional automation:

   • Notes with specific tags are auto-shared to selected users or a workspace
   • Example: #family, #project-a

5. Scope:

   • Should apply to blinkos, notes, and todos
   • Search/RAG should respect visibility permissions
   • Attachments and comments should follow the same access rules

Why this matters

For self-hosted family/team use, sharing one account is not ideal because it loses authorship and personal settings. A workspace model would make Blinko much more useful for collaboration while preserving privacy.