[EPIC] Join trusted sessions automatically and complete the UI/CLI flow

[marwannettour]

Context

After an invitation has been received, decrypted, verified, and accepted, the recipient client must join the existing ByteSync session without manual entry. This epic completes the full trusted-session workflow.

Objective

Connect accepted trusted-session invitations to the existing join-session mechanism, then add optional automated inventory, synchronization, CLI waiting, and complete UI feedback.

Expected capabilities

• Join a session automatically after invitation acceptance.
• Use session ID and password from the validated invitation.
• Respect requested modes: join only, inventory, or synchronize.
• Enforce local policy and grants before automatic actions.
• Display status in initiator and recipient UI.
• Provide machine-readable CLI results.
• Log automatic trusted-session actions.

Acceptance criteria

• A recipient can automatically join a session after accepting a valid invitation.
• Requested modes are applied only when locally authorized.
• Grants allow controlled auto-accept.
• The UI can manage automatic authorization rules.
• The CLI can create a session, wait for clients, and return useful output.
• Errors are visible and understandable.
• Automatic actions are logged.
• End-to-end tests cover the full flow.

Out of scope

• Automatic enrollment of new non-trusted clients.
• PKI or MDM integration.
• Direct AES session key sharing outside the existing mechanism.
• Silent synchronization without an explicit grant.

Implementation tickets

• 5.1 Connect invitation acceptance to the existing join-session flow #340 5.1 Connect invitation acceptance to the existing join-session flow
• 5.2 Respect the requested trusted-session mode #341 5.2 Respect the requested trusted-session mode
• 5.3 Complete auto-accept through trusted-client grants #342 5.3 Complete auto-accept through trusted-client grants
• 5.4 Add UI for managing trusted-session grants #343 5.4 Add UI for managing trusted-session grants
• 5.5 Add CLI commands for managing trusted-session grants #344 5.5 Add CLI commands for managing trusted-session grants
• 5.6 Add initiator-side CLI waiting for invited clients #345 5.6 Add initiator-side CLI waiting for invited clients
• 5.7 Add complete UI feedback for trusted-session invitations #346 5.7 Add complete UI feedback for trusted-session invitations
• 5.8 Add logging for automatic trusted sessions #347 5.8 Add logging for automatic trusted sessions
• 5.9 Add end-to-end tests for the full trusted-session flow #348 5.9 Add end-to-end tests for the full trusted-session flow