Initial commit: establish deterministic rod-string solver stack.

Set up the C solver core, Node API orchestration, TS GUI workflow, and engineering documentation with cleaned repo hygiene for private Git hosting.

Made-with: Cursor

solver-c/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.16)
+project(rod_solver_c C)
+
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+add_library(rod_solver STATIC
+  src/solver_common.c
+  src/json_stdin.c
+  src/trajectory.c
+  src/solver_diagnostic.c
+  src/solver.c
+  src/solver_fea.c
+  src/solver_fourier.c
+)
+target_include_directories(rod_solver PUBLIC include)
+
+add_executable(solver_main src/main.c)
+target_link_libraries(solver_main PRIVATE rod_solver m)
+
+add_executable(solver_fea_main src/main_fea.c)
+target_link_libraries(solver_fea_main PRIVATE rod_solver m)
+
+add_executable(test_solver tests/test_solver.c)
+target_link_libraries(test_solver PRIVATE rod_solver m)
+
+enable_testing()
+add_test(NAME solver_c_tests COMMAND test_solver)