test(worktree-activation): restore the OMP surfaced-agent resume test

The handoff removal deleted it alongside the terminal-owner tests, but it
covers the surfaced-PTY block that still guards resume, including an agent
whose ownership is unknown.

src/renderer/src/lib/worktree-agent-activation-gate.test.ts

@@ -368,6 +368,40 @@ describe('worktree agent activation gate', () => {
     })
   })
 
+  it.each(['present', 'unknown'] as const)(
+    'does not resume OMP when a surfaced %s agent lacks conversation ownership',
+    async (agentOwnership) => {
+      const record = {
+        ...sleepingRecord('old-tab', DEAD_LEAF_ID, 'omp-session'),
+        agent: 'omp' as const
+      }
+      const ptyId = `${WORKTREE_ID}@@current-omp`
+      const { deps, resume, createTab } = testDeps({
+        sessions: [{ ...listed(ptyId), title: 'OMP', agentOwnership }],
+        sleeping: [record],
+        surfaceOwners: new Map([
+          [
+            ptyId,
+            {
+              ptyId,
+              tabId: 'current-tab',
+              paneKey: `current-tab:${LIVE_LEAF_ID}`
+            }
+          ]
+        ])
+      })
+      seedExistingSurface(deps.getState(), {
+        tabId: 'current-tab',
+        leafId: LIVE_LEAF_ID,
+        boundPtyId: ptyId
+      })
+      await expect(runWorktreeAgentActivationGate(WORKTREE_ID, deps)).resolves.toBe('blocked')
+      expect(resume).not.toHaveBeenCalled()
+      expect(createTab).not.toHaveBeenCalled()
+      expect(deps.getState().sleepingAgentSessionsByPaneKey[record.paneKey]).toEqual(record)
+    }
+  )
+
   it('does not use an ambiguous tab binding as a live session claim', async () => {
     const live = sleepingRecord('tab-live', LIVE_LEAF_ID, 'live-session')
     const livePtyId = `${WORKTREE_ID}@@live-agent`