Quiet disconnected SSH polling

Co-authored-by: Orca <help@stably.ai>

notes/host-context-implementation-checklist.md

@@ -140,6 +140,10 @@ Done means: Local, SSH, remote server, and future cloud VMs share one Host model
 - [~] Integration-test Linear/Jira with explicit source account selection.
 - [x] Integration-test automations on local host, SSH host, and remote server where supported.
 - [x] Integration-test disconnected host UX for Tasks, New Workspace modal, sidebar, and automations.
+  - 2026-06-13 follow-up: verified patched main IPC against a live Docker SSH target.
+    Connected SSH PTY inspection returned `bash`; after disconnect, PTY inspection returned
+    `null`/`false` and remote agent detection returned `[]` without repeated main-process
+    handler errors.
 - [ ] Integration-test new client with older remote server and older client with newer server where practical.
 - [x] Electron-test Add Project flows: browse folder, clone URL, and create project from scratch on local and SSH hosts.
 - [x] Electron-test workspace options and sidebar host filtering.

notes/multihost-remote-verification-report.html

@@ -273,6 +273,12 @@
             Docker SSH target through Orca IPC, added an SSH project, created an SSH worktree, tested
             disconnected SSH UX, opened Tasks, opened Automations, and captured screenshots below.
           </li>
+          <li class="pass">
+            Follow-up disconnected SSH validation launched a patched second Electron instance,
+            connected a Docker SSH PTY, observed foreground process <code>bash</code>, disconnected
+            the host, then verified PTY inspection returned <code>null</code>/<code>false</code>
+            and remote agent detection returned <code>[]</code> without repeated handler errors.
+          </li>
           <li class="pass">
             Focused locked-SSH Add Project regression test passed:
             <code>src/renderer/src/components/sidebar/AddRepoDialogStepContent.test.tsx</code>,