fix(tui): resolve lint and AmbiguousStep errors in TuiMaterializer

- Fix ruff format violations: collapse list comprehension in
  materializer.py, collapse function signature, collapse decorators
  and assertion in tui_materializer_steps.py, remove trailing
  whitespace in vulture_whitelist.py
- Remove duplicate Behave step definitions from tui_materializer_steps.py
  that conflicted with output_rendering_steps.py and
  project_commands_coverage_steps.py: create status handle,
  create code handle, close panel handle, close status handle,
  no error should be raised
- Rename render_element_for_tui step texts to avoid conflict with
  tui_first_run_steps.py: rendered text should contain/be empty ->
  render output should contain/be empty
- Update tui_materializer.feature to use renamed step texts and
  replace no error should be raised with materializer still running

ISSUES CLOSED: #11164

features/steps/tui_materializer_steps.py

@@ -130,11 +130,6 @@ def step_call_on_session_begin(context: Any) -> None:
     context.materializer.on_session_begin(None)  # type: ignore[arg-type]
 
 
-@then("no error should be raised")
-def step_no_error_raised(context: Any) -> None:
-    pass  # If we got here, no exception was raised
-
-
 # ---------------------------------------------------------------------------
 # OutputSession integration
 # ---------------------------------------------------------------------------
@@ -157,21 +152,11 @@ def step_create_table_handle(context: Any, title: str) -> None:
     context.table_handle = context.session.table(title)
 
 
-@when('I create a status handle with message "{message}"')
-def step_create_status_handle(context: Any, message: str) -> None:
-    context.status_handle = context.session.status(message)
-
-
 @when('I create a progress handle with label "{label}"')
 def step_create_progress_handle(context: Any, label: str) -> None:
     context.progress_handle = context.session.progress(label, indeterminate=True)
 
 
-@when('I create a code handle with content "{content}" and language "{language}"')
-def step_create_code_handle(context: Any, content: str, language: str) -> None:
-    context.code_handle = context.session.code(content, language=language)
-
-
 @when("I create a separator handle")
 def step_create_separator_handle(context: Any) -> None:
     context.separator_handle = context.session.separator()
@@ -182,16 +167,6 @@ def step_create_action_hint_handle(context: Any, command: str) -> None:
     context.action_hint_handle = context.session.action_hint([command])
 
 
-@when("I close the panel handle")
-def step_close_panel_handle(context: Any) -> None:
-    context.panel_handle.close()
-
-
-@when("I close the status handle")
-def step_close_status_handle(context: Any) -> None:
-    context.status_handle.close()
-
-
 @when("I close the session")
 def step_close_session(context: Any) -> None:
     context.session.close()
@@ -363,9 +338,7 @@ def step_render_tree_element(context: Any, root: str, child: str) -> None:
     context.rendered_text = render_element_for_tui(element)
 
 
-@when(
+@when('I render a CodeBlock element with language "{language}" and content "{content}"')
-    'I render a CodeBlock element with language "{language}" and content "{content}"'
-)
 def step_render_code_element(context: Any, language: str, content: str) -> None:
     from cleveragents.cli.output.handles._models import CodeBlock
     from cleveragents.tui.materializer import render_element_for_tui
@@ -374,9 +347,7 @@ def step_render_code_element(context: Any, language: str, content: str) -> None:
     context.rendered_text = render_element_for_tui(element)
 
 
-@when(
+@when('I render a DiffBlock element with file_a "{file_a}" and file_b "{file_b}"')
-    'I render a DiffBlock element with file_a "{file_a}" and file_b "{file_b}"'
-)
 def step_render_diff_element(context: Any, file_a: str, file_b: str) -> None:
     from cleveragents.cli.output.handles._models import DiffBlock
     from cleveragents.tui.materializer import render_element_for_tui
@@ -423,14 +394,14 @@ def step_render_text_element_with_indent(
     context.rendered_text = render_element_for_tui(element)
 
 
-@then('the rendered text should contain "{text}"')
+@then('the render output should contain "{text}"')
 def step_check_rendered_text_contains(context: Any, text: str) -> None:
     assert text in context.rendered_text, (
         f"Expected {text!r} in rendered_text={context.rendered_text!r}"
     )
 
 
-@then("the rendered text should be empty")
+@then("the render output should be empty")
 def step_check_rendered_text_empty(context: Any) -> None:
     assert context.rendered_text == "", (
         f"Expected empty rendered_text, got: {context.rendered_text!r}"
@@ -442,9 +413,7 @@ def step_check_rendered_text_empty(context: Any) -> None:
 # ---------------------------------------------------------------------------
 
 
-@when(
+@when('I route a permission request for "{file_path}" with type "{request_type}"')
-    'I route a permission request for "{file_path}" with type "{request_type}"'
-)
 def step_route_permission_request(
     context: Any, file_path: str, request_type: str
 ) -> None:
@@ -537,9 +506,7 @@ def step_create_multiple_status_handles_concurrently(context: Any) -> None:
 
 @then("all events should be recorded without data corruption")
 def step_check_thread_safety(context: Any) -> None:
-    assert context.thread_errors == [], (
+    assert context.thread_errors == [], f"Thread errors: {context.thread_errors}"
-        f"Thread errors: {context.thread_errors}"
-    )
     events = context.materializer.events
     # We should have at least 10 element_created + 10 element_closed events
     created = [e for e in events if e.event_type == "element_created"]

features/tui_materializer.feature

@@ -31,7 +31,7 @@ Feature: TUI Materializer
   Scenario: TuiMaterializer implements on_session_begin
     When I create a TuiMaterializer without a callback
     And I call on_session_begin with a mock session
-    Then no error should be raised
+    Then the materializer should still be running
 
   Scenario: TuiMaterializer emits element_created event for panel
     When I create a TuiMaterializer without a callback
@@ -141,72 +141,72 @@ Feature: TUI Materializer
 
   Scenario: render_element_for_tui renders Panel with title and entries
     When I render a Panel element with title "Info" and entry "key" "value"
-    Then the rendered text should contain "Info"
+    Then the render output should contain "Info"
-    And the rendered text should contain "key"
+    And the render output should contain "key"
-    And the rendered text should contain "value"
+    And the render output should contain "value"
 
   Scenario: render_element_for_tui renders Table with columns and rows
     When I render a Table element with title "Data" and column "Name"
-    Then the rendered text should contain "Data"
+    Then the render output should contain "Data"
-    And the rendered text should contain "Name"
+    And the render output should contain "Name"
 
   Scenario: render_element_for_tui renders StatusMessage ok level
     When I render a StatusMessage element with level "ok" and message "Success"
-    Then the rendered text should contain "ok"
+    Then the render output should contain "ok"
-    And the rendered text should contain "Success"
+    And the render output should contain "Success"
 
   Scenario: render_element_for_tui renders StatusMessage error level
     When I render a StatusMessage element with level "error" and message "Failed"
-    Then the rendered text should contain "error"
+    Then the render output should contain "error"
-    And the rendered text should contain "Failed"
+    And the render output should contain "Failed"
 
   Scenario: render_element_for_tui renders indeterminate ProgressIndicator
     When I render an indeterminate ProgressIndicator with label "Thinking"
-    Then the rendered text should contain "Thinking"
+    Then the render output should contain "Thinking"
 
   Scenario: render_element_for_tui renders determinate ProgressIndicator
     When I render a determinate ProgressIndicator with label "Loading" current 5 total 10
-    Then the rendered text should contain "Loading"
+    Then the render output should contain "Loading"
-    And the rendered text should contain "50%"
+    And the render output should contain "50%"
 
   Scenario: render_element_for_tui renders Tree with root and children
     When I render a Tree element with root "root" and child "child1"
-    Then the rendered text should contain "root"
+    Then the render output should contain "root"
-    And the rendered text should contain "child1"
+    And the render output should contain "child1"
 
   Scenario: render_element_for_tui renders CodeBlock with language
     When I render a CodeBlock element with language "python" and content "x = 1"
-    Then the rendered text should contain "python"
+    Then the render output should contain "python"
-    And the rendered text should contain "x = 1"
+    And the render output should contain "x = 1"
 
   Scenario: render_element_for_tui renders DiffBlock with hunks
     When I render a DiffBlock element with file_a "old.py" and file_b "new.py"
-    Then the rendered text should contain "old.py"
+    Then the render output should contain "old.py"
-    And the rendered text should contain "new.py"
+    And the render output should contain "new.py"
 
   Scenario: render_element_for_tui renders Separator line style
     When I render a Separator element with style "line"
-    Then the rendered text should contain "-"
+    Then the render output should contain "-"
 
   Scenario: render_element_for_tui renders Separator blank style
     When I render a Separator element with style "blank"
-    Then the rendered text should be empty
+    Then the render output should be empty
 
   Scenario: render_element_for_tui renders Separator double style
     When I render a Separator element with style "double"
-    Then the rendered text should contain "="
+    Then the render output should contain "="
 
   Scenario: render_element_for_tui renders ActionHint with commands
     When I render an ActionHint element with command "agents plan list"
-    Then the rendered text should contain "agents plan list"
+    Then the render output should contain "agents plan list"
 
   Scenario: render_element_for_tui renders TextBlock content
     When I render a TextBlock element with content "Hello world"
-    Then the rendered text should contain "Hello world"
+    Then the render output should contain "Hello world"
 
   Scenario: render_element_for_tui renders TextBlock with indent
     When I render a TextBlock element with content "indented" and indent 4
-    Then the rendered text should contain "    indented"
+    Then the render output should contain "    indented"
 
   # ── A2A event routing ─────────────────────────────────────────────────────
 

src/cleveragents/tui/materializer.py

@@ -139,11 +139,7 @@ class TuiMaterializer:
         Useful for testing and headless inspection.
         """
         with self._lock:
-            parts = [
+            parts = [text for _, text in sorted(self._rendered.items()) if text]
-                text
-                for _, text in sorted(self._rendered.items())
-                if text
-            ]
         return "\n\n".join(parts)
 
     # ------------------------------------------------------------------
@@ -269,9 +265,7 @@ class TuiMaterializer:
         self._emit(tui_event)
         return tui_event
 
-    def route_thought_block(
+    def route_thought_block(self, thought: ThoughtBlock) -> TuiWidgetEvent:
-        self, thought: ThoughtBlock
-    ) -> TuiWidgetEvent:
         """Route a thought block event to the TUI.
 
         Creates a ``TuiWidgetEvent`` with ``event_type="thought_block"``

vulture_whitelist.py

@@ -301,7 +301,7 @@ _snapshot_to_dict  # noqa: B018, F821
 _create_strategy  # noqa: B018, F821
 VALID_FORMATS  # noqa: B018, F821
 
-# TUI materializer — bridges Output Rendering Framework to Textual widgets  
+# TUI materializer — bridges Output Rendering Framework to Textual widgets
 TuiMaterializer  # noqa: B018, F821
 TuiWidgetEvent  # noqa: B018, F821
 TuiWidgetEventType  # noqa: B018, F821