feat(server): t3_thread_import, conversation only#16731

feat(server): t3_thread_import, conversation only

feat(web,mobile): @-mention a machine as a context chip

fix(web,mobile): a minted pairing code carries the access the link asks for

feat(web,mobile): pick a T3 Connect machine when linking

fix(server): a thread waits on its link card after the agent's turn ends

fix(web,mobile): each link answer mints its own pairing code

fix(web): the link dialog starts fresh each time it opens

fix(server): a slow machine no longer holds up every link card's answer

fix(server): a link card stays answerable after a steer, and Stop shows no new one

fix(server): an expired link goes through the link card

fix(server): a link card's id names the provider session that asked

feat(server,web,mobile): an agent sets up a link to another environment

fix(server): a remote task with no project there says how to bring one

fix(web,mobile): a task a linked environment runs shows under its parent

fix(server): a remote task refuses worktree isolation, and its failures keep the cause

fix(server): acknowledge only the matching remote stop generation

fix(server): stopping a parent stops a finished remote task's thread there

fix(server): a remote task waits for its thread's delegated work

fix(server): report the failed remote run's provider error

feat(server): delegate_task to a linked environment

fix(connections): reset pairing forms and refresh mobile link status

test(client-runtime): exercise permitted peer link lifecycle

docs: what agents may do on a linked machine, by the link's access

feat(web,mobile): linked environments in Connections

feat(server): a full-access link is not fenced

feat(server): work a link starts may add projects

feat(server): work a linked environment starts stays within its link

feat(server): every tool that names a thread, project or queue reaches a linked environment

feat(server): agents create and clone projects in a linked environment

feat(server): agents use linked environments

feat(server): link to another environment

feat(server): t3_thread_launch takes clientRequestId

feat(server): /mcp narrows a client's modes from T3-Mode-Limit