现有组件功能与Amesim组件比较对齐，补全功能；仿真服务启动环境检测，旧版json工程文件适配读取

native/include/kernels.h

@@ -7,6 +7,15 @@ typedef struct {
     double lower, upper;
     double lower_restitution, upper_restitution, lower_threshold, upper_threshold;
 } NativeStop;
+/* Discrete slip direction is stored with the sampled state, never in a global
+ * RHS cache. Trial/Jacobian evaluations cannot change sticking/sliding mode. */
+typedef struct {
+    int velocity_index, mode_index;
+    double velocity_threshold, breakaway_force;
+} NativeFriction;
+double native_dry_friction(double velocity, double static_share, double coulomb,
+                           double stiction, double stribeck_velocity, int stribeck,
+                           double mode);
 /* Constants are emitted per medium instance by the model compiler. */
 typedef struct { int real_helium; double R, cp, Tref, slope, mu, muT, S; } NativeMedium;
 /* Caller-owned scratch for ONE model_eval. Keys use exact values and a copy of
@@ -27,6 +36,7 @@ typedef struct {
 void native_properties_init(NativePropertyCache *, NativePropertyState *, size_t capacity);
 int native_gas_context(NativePropertyCache *, double m, double U, double V, NativeGas *);
 int native_medium_gas_context(NativePropertyCache *, const NativeMedium *, double m, double U, double V, NativeGas *);
+int native_polytropic_gas_context(NativePropertyCache *, const NativeMedium *, double mass, double T, double V, NativeGas *);
 double native_temperature_ph_context(NativePropertyCache *, const NativeMedium *, double p, double h);
 double native_density_context(NativePropertyCache *, const NativeMedium *, double p, double T);
 int native_orifice_context(NativePropertyCache *, double p1, double p2, double h1, double h2,

native/include/runtime.h

@@ -2,6 +2,9 @@
 #define NATIVE_RUNTIME_H
 #include "model.h"
 #include <stddef.h>
+#ifndef NFRICTIONS
+#define NFRICTIONS 0
+#endif
 typedef struct {
     double start, stop, sample_step, max_step, rtol, timeout;
     int bdf, record_samples;