feat: integrate AMESim media models and editor UI

app/simulation/solvers/solver.py

@@ -21,6 +21,7 @@ class SolveIVPConfig:
     rtol: float = 1e-6
     atol: float = 1e-8
     max_step: float = 1e-3
+    first_step: float | None = None
 
 
 @dataclass(frozen=True)
@@ -162,15 +163,21 @@ def _integrate_scipy_stepwise(
             status="cancelled",
         )
 
+    solver_options = {
+        "rtol": config.rtol,
+        "atol": config.atol,
+        "max_step": config.max_step,
+    }
+    if config.first_step is not None:
+        solver_options["first_step"] = config.first_step
+
     try:
         solver = solver_type(
             cancellable_rhs,
             config.t_start,
             np.asarray(initial_state, dtype=float),
             config.t_stop,
-            rtol=config.rtol,
-            atol=config.atol,
-            max_step=config.max_step,
+            **solver_options,
         )
     except _IntegrationCancelled:
         return ODESolution(
@@ -296,13 +303,16 @@ def integrate_ode(
             accepted_step_callback,
         )
 
-    return solve_ivp(
-        fun=rhs,
-        t_span=(config.t_start, config.t_stop),
-        y0=initial_state,
-        method=config.method,
-        rtol=config.rtol,
-        atol=config.atol,
-        max_step=config.max_step,
-        t_eval=t_eval,
-    )
+    solve_options = {
+        "fun": rhs,
+        "t_span": (config.t_start, config.t_stop),
+        "y0": initial_state,
+        "method": config.method,
+        "rtol": config.rtol,
+        "atol": config.atol,
+        "max_step": config.max_step,
+        "t_eval": t_eval,
+    }
+    if config.first_step is not None:
+        solve_options["first_step"] = config.first_step
+    return solve_ivp(**solve_options)