style: apply ruff format to plan use panels implementation files

Auto-format three files that failed the CI ruff format --check gate:
- features/steps/tdd_plan_use_structured_panels_steps.py
- robot/helper_tdd_plan_use_structured_panels.py
- src/cleveragents/cli/commands/plan.py

No logic changes — formatting only.

ISSUES CLOSED: #1468

features/steps/tdd_plan_use_structured_panels_steps.py

@@ -263,8 +263,7 @@ def step_plan_use_output_succeed(context: Context) -> None:
 def step_plan_use_output_contains_plan_id(context: Context) -> None:
     """Assert the output contains the plan ULID."""
     assert _PLAN_ULID in context.result.output, (
-        f"Expected plan ID '{_PLAN_ULID}' in output.\n"
-        f"Output:\n{context.result.output}"
+        f"Expected plan ID '{_PLAN_ULID}' in output.\nOutput:\n{context.result.output}"
     )
 
 
@@ -272,6 +271,5 @@ def step_plan_use_output_contains_plan_id(context: Context) -> None:
 def step_plan_use_output_contains(context: Context, text: str) -> None:
     """Assert the output contains the given text."""
     assert text in context.result.output, (
-        f"Expected '{text}' in output.\n"
-        f"Output:\n{context.result.output}"
+        f"Expected '{text}' in output.\nOutput:\n{context.result.output}"
     )

robot/helper_tdd_plan_use_structured_panels.py

@@ -138,8 +138,13 @@ def check_plan_created_panel() -> None:
         sys.exit(1)
 
     required = [
-        "Plan Created", _PLAN_ULID, "Phase", "Action",
-        "Project", "Automation", "Attempt",
+        "Plan Created",
+        _PLAN_ULID,
+        "Phase",
+        "Action",
+        "Project",
+        "Automation",
+        "Attempt",
     ]
     missing = [f for f in required if f not in output]
     if missing:

src/cleveragents/cli/commands/plan.py

@@ -1665,9 +1665,7 @@ def _print_use_action_panels(plan: Any) -> None:
     hot_token_budget_val: str
     if plan.cost_metadata is not None:
         budget = plan.cost_metadata.budget_remaining
-        hot_token_budget_val = (
-            f"{budget:,.2f}" if budget is not None else "(unlimited)"
-        )
+        hot_token_budget_val = f"{budget:,.2f}" if budget is not None else "(unlimited)"
     else:
         hot_token_budget_val = "(unknown)"