feat(ssh): wave 4 — computer HTTP/WS endpoints + chat computerId threading

Wave 4 of transparent SSH support (3 parallel owner-agents on disjoint packages).

- transport-http: computer routes — GET /computers, GET /computers/:alias,
  GET /computers/:alias/status, POST /computers/:alias/test (all delegate to a
  new ComputerService seam, graceful []/disconnected when ssh not loaded);
  GET/PUT/DELETE /conversations/:id/computer; PUT /workspaces/:id/default-computer
  (mirror the cwd/default-cwd routes); /chat threads computerId into the
  orchestrator. Defines ComputerService interface + computerServiceHandle
  (defineService<ComputerService>('ssh')) in seam.ts — the seam the ssh package
  provides via host.provideService in wave 5.
- transport-ws: chat.send + chat.queue thread computerId onto the route result
  (mirrors cwd/workspaceId), forwarded to the orchestrator input.
- mcp: CR-1 fix — filterMcpTools now preserves computerId on the returned
  ToolAssembly (mirrors cwd preservation), so the filter chain stays consistent.
- orchestrator: added @dispatch/wire dep to transport-http (build/config, my lane)
  so its seam.ts Computer/ComputerEntry import resolves.

Verified: tsc -b EXIT 0, biome clean, 1641 vitest pass (was 1620, +21).
Refs: notes/ssh-support-plan.md (decisions §0.5/§13). No merge or push.

0 files changed, 0 insertions, 0 deletions