feat: improve task execution, verification and packaging

Add execution incidents, action bursts and shared Flash history.

Expose verification and Explorer settings with streamed check results.

Support graceful cancellation, recording recovery and bundled UI resources.

Add CI quality checks and clean up comments and documentation.

tests/unit/graph/test_graph.py

@@ -39,7 +39,6 @@ def _make_ctx(base_dir, *, disable_checker=True, disable_planner_validation=Fals
     ctx.pending_checkpoints = []
     ctx.checkpoint_tasks = {}
     ctx.pending_validated_plan = None
-    ctx.task_plan_content_before = None
     return ctx
 
 
@@ -192,8 +191,6 @@ async def test_ratchet_baseline_survives_consecutive_small_edits(tmp_path):
     # Both validation runs were anchored to the original baseline
     for call in mock_validation.call_args_list:
         assert call.args[2] == ORIGINAL_PLAN
-    # Rollback target preserves the last baseline-consistent content
-    assert ctx.task_plan_content_before == ORIGINAL_PLAN
 
 
 @pytest.mark.asyncio