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

.gitignore

@@ -0,0 +1,23 @@
+node_modules/
+**/node_modules/
+
+dist/
+**/dist/
+build/
+coverage/
+.vite/
+
+solver-c/solver_main
+solver-c/solver_fea_main
+solver-c/test_solver
+*.o
+*.out
+
+.DS_Store
+*.log
+
+.env
+.env.*
+
+.vscode/
+.idea/