test: fix three broken tests for post-merge code changes

- update SetTodoList schema snapshot to include the new `merge`
  compatibility field (excluded from serialization but present in JSON schema)
- rename and flip test_helper_leaves_bare_fence_line_untouched: bare
  ` ``` ` openers are now suppressed with fallback lang "code", matching
  the paired-fence tracking introduced alongside the CodeRabbit fix
- patch DiffLive (not the removed Rich Live) in
  test_live_view_processes_external_approval_messages; drop the
  Rich-specific _live_render attribute and add refresh() no-op
- add CHANGELOG unreleased entry for the smooth-streaming coalescing work

Author: elkaix

CHANGELOG.md

@@ -15,6 +15,11 @@ GitHub Releases page; `0.8.0` is the new starting line.
 
 ## Unreleased
 
+- **TUI: smoother agent-working streaming.** Buffered text now reveals at an even,
+  bounded rate instead of backlog-proportional lurches, and incremental scrollback
+  commits are coalesced so the prompt no longer pops/flickers on every paragraph
+  boundary during a stream.
+
 - **TUI tool-card diffs use syntax highlighting.** Edit/Write inline diffs now share the
   approval/pager ``PythinkerSyntax`` pipeline (``tui.code_theme``, file-extension lexer) while
   keeping the compact boxless card layout.

tests/tools/test_tool_schemas.py

@@ -161,7 +161,12 @@ def test_set_todo_list_params_schema(set_todo_list_tool: SetTodoList):
                     ],
                     "default": None,
                     "description": "The updated todo list. If not provided, returns the current todo list without making changes.",
-                }
+                },
+                "merge": {
+                    "anyOf": [{"type": "boolean"}, {"type": "null"}],
+                    "default": None,
+                    "description": "Accepted for compatibility with some LLM providers; silently ignored.",
+                },
             },
             "type": "object",
         }

tests/ui_and_conv/test_streaming_content_block.py

@@ -991,17 +991,17 @@ def test_helper_supports_tilde_fence(self):
         closed_out = blocks_module._suppress_unclosed_code_fence_preview(_TILDE_CLOSED_FENCE_STREAM)
         assert closed_out == _TILDE_CLOSED_FENCE_STREAM
 
-    def test_helper_leaves_bare_fence_line_untouched(self):
-        """A bare triple-backtick line is structurally a closer in this
-        codebase (``_FENCE_CLOSE_RE``), so an opener without a language tag
-        cannot be told apart from a closer. The helper intentionally
-        suppresses only fences that carry a language tag; otherwise it would
-        risk eating real closers. Confirms the conservative contract.
+    def test_helper_suppresses_bare_fence_opener(self):
+        """A bare triple-backtick opener (no language tag) is now suppressed
+        using "code" as the fallback language, so its raw body is hidden until
+        the closer arrives — same as a tagged fence.
         """
         from pythinker_code.ui.shell.visualize import _blocks as blocks_module
 
         out = blocks_module._suppress_unclosed_code_fence_preview(_NO_LANG_OPEN_FENCE_STREAM)
-        assert out == _NO_LANG_OPEN_FENCE_STREAM
+        assert "plain text inside fence" not in out
+        assert "streaming code block" in out
+        assert "(code)" in out
 
     def test_helper_does_not_touch_report_fence(self):
         from pythinker_code.ui.shell.visualize import _blocks as blocks_module

tests/ui_and_conv/test_visualize_running_prompt.py

@@ -365,9 +365,7 @@ def invalidate(self) -> None:
             pass
 
     monkeypatch.setattr(_interactive_mod, "run_in_terminal", _run_in_terminal)
-    monkeypatch.setattr(
-        _live_view_mod, "emit_scrollback_block", lambda _console, renderable: None
-    )
+    monkeypatch.setattr(_live_view_mod, "emit_scrollback_block", lambda _console, renderable: None)
     monkeypatch.setattr(_interactive_mod.time, "monotonic", lambda: 1000.0)
 
     view = _PromptLiveView(
@@ -401,9 +399,7 @@ def invalidate(self) -> None:
             pass
 
     monkeypatch.setattr(_interactive_mod, "run_in_terminal", _run_in_terminal)
-    monkeypatch.setattr(
-        _live_view_mod, "emit_scrollback_block", lambda _console, renderable: None
-    )
+    monkeypatch.setattr(_live_view_mod, "emit_scrollback_block", lambda _console, renderable: None)
     monkeypatch.setattr(_interactive_mod.time, "monotonic", lambda: 1000.0)
 
     view = _PromptLiveView(
@@ -1020,6 +1016,9 @@ def __exit__(self, exc_type, exc, tb) -> bool:
         def update(self, renderable, refresh: bool = True) -> None:
             updates.append(renderable)
 
+        def refresh(self) -> None:
+            return None
+
         def stop(self) -> None:
             return None
 
@@ -1034,7 +1033,7 @@ async def receive(self):
     async def _no_keyboard_listener(*args, **kwargs):
         yield
 
-    monkeypatch.setattr(_live_view_mod, "Live", _FakeLive)
+    monkeypatch.setattr(_live_view_mod, "DiffLive", _FakeLive)
     monkeypatch.setattr(_live_view_mod, "_keyboard_listener", _no_keyboard_listener)
 
     view = _LiveView(StatusUpdate())