Port DOOM-ED to latest Orion and expand triangulation edge-case coverage

[Copilot]

This PR updates DOOM-ED to track the latest Orion UI framework and strengthens geometry verification where coverage was weakest. The scope is compatibility with current Orion plus materially broader triangulation correctness checks.

• Orion upgrade

  • Bumps the ui submodule to latest upstream main (current Orion head).
  • Aligns the repo with recent Orion API/runtime behavior without app-level logic changes.

• Build bootstrap hardening

  • Updates root Makefile to auto-initialize the ui submodule when missing, avoiding first-run failures from fresh clones/checkouts.
  • Keeps existing build flow intact once submodules are present.

• Triangulation coverage expansion

  • Extends tests/triangulate_test.c with focused edge/correctness cases:
    • all-collinear input (expects no triangles),
    • polygons with collinear edge points,
    • repeated points robustness,
    • larger convex polygon scaling checks,
    • output-vertex membership validation (no synthetic vertices),
    • additional area-preservation assertions on new cases.

$(LIBORION):
	@if [ ! -f $(UI_DIR)/Makefile ]; then \
		echo "Initializing $(UI_DIR) submodule..."; \
		git submodule update --init --recursive $(UI_DIR); \
	fi
	@echo "Building liborion via ui/Makefile..."
	@$(MAKE) -C $(UI_DIR) library

[Copilot]

Pull request overview

This pull request strengthens DOOM-ED’s geometry verification by expanding the triangulation test suite with additional edge cases, and hardens the build bootstrap by auto-initializing the Orion UI submodule when missing.

Changes:

• Added polygon area and output-vertex provenance helpers to improve triangulation correctness assertions.
• Expanded triangulate_test coverage to include collinear-only input, collinear edge points, repeated points, and larger convex polygons.
• Updated the root Makefile to auto-run git submodule update --init --recursive ui when ui/Makefile is missing.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/triangulate_test.c	Adds new helpers and multiple triangulation edge-case tests (degenerate, collinear, repeated points, scaling).
Makefile	Auto-initializes the ui submodule when needed before building liborion.