fix(terminal): a parked local tab whose process exits closes as a pty-exit, not a user close (#34083)

The parked watcher passes only hostCloseReason 'pty-exit' (so the pinned
guard still applies), and the local branch then let closeTab default the
reason to 'user': a process exit wrote a user tombstone and retired the
session. The local close now carries the pty-exit reason.

Co-authored-by: Claude <noreply@anthropic.com>

src/renderer/src/components/terminal/terminal-tab-actions-unrouted-close.test.ts

@@ -88,4 +88,15 @@ describe('closeTerminalTab before the worktree catalog names a host', () => {
     expect(onClosed).toHaveBeenCalled()
     expect(closeWebRuntimeSessionTabMock).not.toHaveBeenCalled()
   })
+
+  it('closes a parked local tab whose process exited as a pty-exit, never a user close', () => {
+    // A user close would tombstone the tab and retire its session (verify-15a 5e).
+    isWebRuntimeSessionActiveMock.mockReturnValue(false)
+    const closeTab = vi.fn()
+    getStateMock.mockReturnValue(unhydratedState('pty-1', closeTab))
+
+    closeTerminalTab('tab-1', { hostCloseReason: 'pty-exit', lifecyclePtyId: 'pty-1' })
+
+    expect(closeTab).toHaveBeenCalledWith('tab-1', expect.objectContaining({ reason: 'pty-exit' }))
+  })
 })

src/renderer/src/components/terminal/terminal-tab-actions.ts

@@ -199,7 +199,8 @@ export function closeTerminalTab(
   }
 
   closeLocalTerminalTabState(terminalTabId, {
-    reason: options?.reason,
+    // A parked tab's process exit carries only the host reason, to keep the pin guard above.
+    reason: options?.reason ?? (options?.hostCloseReason === 'pty-exit' ? 'pty-exit' : undefined),
     ...(options?.captureRecentlyClosed !== undefined
       ? { captureRecentlyClosed: options.captureRecentlyClosed }
       : {}),