Refacto du code coté Python, java et coté angular afin de mieux séparer les responsabilité et d'avoir moins de répétitivité dans le code.

Mise en place de tests unitaires coté Python et Angular
Mise en place de la couverture de test directement dans le workflow : le programme ne build pas si jamais un test échoue
Passage en v0.16.2 en conséquence

brain/tests/test_section_merger.py

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+"""Tests des helpers de l'import de règles (app.application.import_rules) :
+_SectionMerger, _normalize_sections, _coerce_markdown, _find_anchor, _combine_sections.
+"""
+from __future__ import annotations
+
+from app.application.import_rules import (
+    _SectionMerger,
+    _coerce_markdown,
+    _combine_sections,
+    _find_anchor,
+    _normalize_sections,
+)
+
+
+# --- _SectionMerger ------------------------------------------------------------
+
+def test_section_merger_case_insensitive_and_joins():
+    m = _SectionMerger()
+    touched = m.add({"Combat": "règle A", "combat": "règle B"})
+    assert touched == ["Combat"]            # clé canonique = 1re vue
+    res = m.result()
+    assert list(res.keys()) == ["Combat"]
+    assert res["Combat"] == "règle A\n\nrègle B"
+
+
+def test_section_merger_skips_empty_title_or_content():
+    m = _SectionMerger()
+    touched = m.add({"": "x", "Titre": "   ", "Vrai": "contenu"})
+    assert touched == ["Vrai"]
+    assert m.result() == {"Vrai": "contenu"}
+
+
+def test_section_merger_accumulates_across_chunks():
+    m = _SectionMerger()
+    m.add({"Combat": "p1"})
+    m.add({"Combat": "p2", "Magie": "sorts"})
+    res = m.result()
+    assert res["Combat"] == "p1\n\np2"
+    assert res["Magie"] == "sorts"
+
+
+# --- _normalize_sections -------------------------------------------------------
+
+def test_normalize_unwraps_known_envelope():
+    assert _normalize_sections({"sections": {"Combat": "x"}}) == {"Combat": "x"}
+    assert _normalize_sections({"règles": {"A": "y"}}) == {"A": "y"}
+
+
+def test_normalize_title_content_schema():
+    assert _normalize_sections({"title": "Combat", "content": "texte"}) == {"Combat": "texte"}
+
+
+def test_normalize_strips_meta_keys():
+    assert _normalize_sections({"Combat": "x", "thought": "bla", "notes": "y"}) == {"Combat": "x"}
+
+
+def test_normalize_passthrough_plain_sections():
+    assert _normalize_sections({"A": "1", "B": "2"}) == {"A": "1", "B": "2"}
+
+
+# --- _coerce_markdown ----------------------------------------------------------
+
+def test_coerce_markdown_string_passthrough():
+    assert _coerce_markdown("texte") == "texte"
+
+
+def test_coerce_markdown_none_is_empty():
+    assert _coerce_markdown(None) == ""
+
+
+def test_coerce_markdown_list_joined():
+    assert _coerce_markdown(["a", "b"]) == "a\n\nb"
+
+
+def test_coerce_markdown_dict_flattened():
+    out = _coerce_markdown({"Sous-titre": "contenu"})
+    assert "Sous-titre" in out
+    assert "contenu" in out
+
+
+# --- _find_anchor --------------------------------------------------------------
+
+def test_find_anchor_exact():
+    text = "Chapitre 1. Le héros entre."
+    assert _find_anchor(text, "Le héros entre", 0) == text.index("Le héros entre")
+
+
+def test_find_anchor_whitespace_flexible():
+    text = "Le   héros\nentre dans la taverne."
+    # Espaces multiples / saut de ligne dans le texte source, anchor normalisé.
+    assert _find_anchor(text, "Le héros entre dans la taverne", 0) is not None
+
+
+def test_find_anchor_case_insensitive():
+    assert _find_anchor("LE DONJON s'ouvre", "le donjon", 0) is not None
+
+
+def test_find_anchor_not_found():
+    assert _find_anchor("texte quelconque", "introuvable xyz", 0) is None
+
+
+# --- _combine_sections ---------------------------------------------------------
+
+def test_combine_sections_case_insensitive_concat():
+    out = _combine_sections({"Combat": "p1"}, {"combat": "p2", "Magie": "sorts"})
+    assert out["Combat"] == "p1\n\np2"
+    assert out["Magie"] == "sorts"