docs: align consolidated solver workflow

phases/linear-static-mitc4-shell/step3.md

@@ -10,13 +10,13 @@
 - `/.agents/skills/harness/SKILL.md`, `/.codex/skills/fesa-cpp-msvc-tdd/SKILL.md`
 - `/AGENTS.md`, `/docs/PRD.md`, `/docs/ARCHITECTURE.md`, `/docs/ADR.md`
 - `/docs/HARNESS.md`, `/docs/HARNESS_WORKFLOW.md`, `/.codex/hooks.json`
-- `/docs/implementation-plans/linear-static-mitc4-shell-implementation-plan.md`
-- `/docs/requirements/linear-static-mitc4-shell.md` Requirements 031-038/050-052
-- `/docs/research/linear-static-mitc4-shell-research.md`
-- `/docs/formulations/mitc4-shell-formulation.md` Sections 3-11, 17
-- `/docs/numerical-reviews/linear-static-mitc4-shell-review.md` Sections 5.1-5.6, 6.1-6.2
-- `/docs/io-definitions/linear-static-mitc4-shell-io.md`
-- `/docs/reference-models/linear-static-mitc4-shell-reference-models.md`
+- `/docs/linear-static-mitc4-shell/implementation-plan.md`
+- `/docs/linear-static-mitc4-shell/requirements.md` Requirements 031-038/050-052
+- `/docs/linear-static-mitc4-shell/research.md`
+- `/docs/linear-static-mitc4-shell/formulation.md` Sections 3-11, 17
+- `/docs/linear-static-mitc4-shell/numerical-review.md` Sections 5.1-5.6, 6.1-6.2
+- `/docs/linear-static-mitc4-shell/io.md`
+- `/docs/linear-static-mitc4-shell/reference-model.md`
 - phase indexes, `step3.md`, Step 2 geometry paths/summary
 - `/include/fesa/elements/euler_beam_3d.hpp`와 cpp는 concrete value-kernel style 참고용
 - Candidate new `/include/fesa/elements/mitc4_shell.hpp`