fix(dream): gate cursor on run completion

tests/command/test_builtin_dream.py

@@ -274,8 +274,8 @@ async def test_dream_keeps_cursor_when_incomplete_with_diff(tmp_path) -> None:
 
 
 @pytest.mark.asyncio
-async def test_dream_keeps_cursor_when_completed_after_tool_error(tmp_path) -> None:
-    """A soft tool failure must not masquerade as a verified no-op."""
+async def test_dream_advances_cursor_when_completed_after_tool_error(tmp_path) -> None:
+    """A handled tool failure does not invalidate a normally completed run."""
     ctx, store = _build_runnable_dream(
         tmp_path,
         initialized=True,
@@ -284,8 +284,8 @@ async def test_dream_keeps_cursor_when_completed_after_tool_error(tmp_path) -> N
     )
     await cmd_dream(ctx)
     await asyncio.sleep(0)
-    assert store._last_dream_cursor == 5
-    assert "did not complete" in ctx.loop.bus.outbound[0].content
+    assert store._last_dream_cursor == 42
+    assert "no memory changes" in ctx.loop.bus.outbound[0].content
 
 
 @pytest.mark.asyncio
@@ -339,7 +339,7 @@ async def test_dream_noop_batch_unlocks_following_history(tmp_path) -> None:
 
 @pytest.mark.asyncio
 async def test_dream_non_git_falls_back_to_completion_gate(tmp_path) -> None:
-    """Non-git workspaces use the same clean-completion gate."""
+    """Non-git workspaces use the same normal-completion gate."""
     ctx, store = _build_runnable_dream(
         tmp_path, initialized=False, content_diff="", stop_reason="completed",
     )