Add hook-level regression coverage proving useCanvasFlowReconciliation preserves local node state while the shared resize lock is active. The test harness now supports driving the resize ref the same way production interactions do.
Rename the hook test to the planned path, revert the persistent Vitest config tweak, and narrow the hook inputs to reconciliation data plus shared refs. Keep verification working with a temporary test config instead of expanding the repo-level include list.
Move Convex-to-local node and edge reconciliation into a dedicated hook so canvas.tsx has a cleaner sync boundary during modularization. Add hook-level tests for optimistic edge carry and drag-lock behavior to preserve the existing UX.
