remove obsolete tests from test_invalid_parent_assignment

- Delete 'Earth should not become child of spacecraft' test (spacecraft are now in separate array)
- Delete 'detect placeholder config values' test (validation now happens at load time)

tests/test_invalid_parent_assignment.cpp

@@ -4,34 +4,6 @@
 #include "../src/config_loader.h"
 #include <cmath>
 
-TEST_CASE("Invalid parent: Earth should not become child of spacecraft",
-          "[init][parent][bug]") {
-    const double TIME_STEP = 60.0;
-
-    SimulationState* sim = create_simulation(10, 0, 0, TIME_STEP);
-    REQUIRE(load_system_config(sim, "tests/configs/earth_mars_simple.toml"));
-
-    const int EARTH_IDX = 1;
-    const int SPACECRAFT_IDX = 3;
-    const int SUN_IDX = 0;
-
-    REQUIRE(sim->bodies[EARTH_IDX].parent_index == SUN_IDX);
-
-    for (int step = 0; step < 10; step++) {
-        update_simulation(sim);
-
-        int earth_parent = sim->bodies[EARTH_IDX].parent_index;
-
-        INFO("Step " << step << ": Earth's parent = " << earth_parent
-             << " (" << (earth_parent == SPACECRAFT_IDX ? "SPACECRAFT" :
-                         earth_parent == SUN_IDX ? "Sun" : "Other") << ")");
-
-        REQUIRE(earth_parent != SPACECRAFT_IDX);
-    }
-
-    destroy_simulation(sim);
-}
-
 TEST_CASE("Invalid parent: massive bodies never become children of small bodies",
           "[init][parent][hierarchy]") {
     const double TIME_STEP = 60.0;
@@ -79,34 +51,6 @@ TEST_CASE("Invalid parent: massive bodies never become children of small bodies"
     destroy_simulation(sim);
 }
 
-TEST_CASE("Invalid parent: detect placeholder config values",
-          "[init][config][validation]") {
-    const double TIME_STEP = 60.0;
-
-    SimulationState* sim = create_simulation(10, 0, 0, TIME_STEP);
-    REQUIRE(load_system_config(sim, "tests/configs/earth_mars_simple.toml"));
-
-    const int EARTH_IDX = 1;
-    const int SPACECRAFT_IDX = 3;
-
-    Vec3 craft_pos = sim->bodies[SPACECRAFT_IDX].global_position;
-    Vec3 earth_pos = sim->bodies[EARTH_IDX].global_position;
-
-    double distance = vec3_distance(craft_pos, earth_pos);
-    double min_distance = sim->bodies[EARTH_IDX].radius + sim->bodies[SPACECRAFT_IDX].radius;
-
-    INFO("Distance Earth <-> Spacecraft: " << distance << " m");
-    INFO("Earth position: (" << earth_pos.x << ", " << earth_pos.y << ", " << earth_pos.z << ")");
-    INFO("Spacecraft position: (" << craft_pos.x << ", " << craft_pos.y << ", " << craft_pos.z << ")");
-    INFO("Earth radius: " << sim->bodies[EARTH_IDX].radius << " m");
-    INFO("Spacecraft radius: " << sim->bodies[SPACECRAFT_IDX].radius << " m");
-    INFO("Minimum required: " << min_distance << " m (parent radius + body radius)");
-
-    REQUIRE(distance >= min_distance);
-
-    destroy_simulation(sim);
-}
-
 TEST_CASE("Mutual SOI: similar mass planets within SOI boundary",
           "[init][soi][mutual][edge_case]") {
     const double TIME_STEP = 60.0;