better signal graphing

BEdit/AGENTS.md

@@ -131,6 +131,8 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
   progress, log, and future result views. Extend graph presentation through its
   Designer-owned `resultsLayout` and the
   `clear_result_views()`/`load_result_views()` hooks.
+- Simulation-window geometry, dock/toolbar state, and central-results visibility
+  persist under `simulationWindow/` through `application_settings()`.
 - Standalone simulation results are modeled in `core/simulation/results.py`.
   Its versioned schema retains model status, messages, metadata, and plottable
   traces so the simulation window can open results without an active document.
@@ -149,6 +151,9 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
   Signals tree checkboxes edit the active graph's traces, and each page embeds a
   Matplotlib QtAgg canvas. Each graph persists its own `x_axis` signal (default
   `time`), selectable from the Signals tree context menu.
+- Rerunning the same composed model retains graph tabs, ordering, titles, X axes,
+  and surviving trace settings while replacing numeric data. Missing signals are
+  pruned from traces/X-axis selection and newly returned columns appear in the tree.
 - The optional OpenModelica executable is persisted as
   `simulation/openModelicaPath`. The GUI passes it into `Simulation`; core must
   not read `QSettings`. An empty path uses OMPython/PATH discovery, while an