feat(compte): coquille account_shell (sidebar + offcanvas + garde d'accès) (#73)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_compte_shell.py

@@ -0,0 +1,43 @@
+from src.pages import _compte_shell as shell
+
+
+def test_visible_sections_hides_gated_without_subscription():
+    keys = {s["key"] for s in shell.visible_sections(has_subscription=False)}
+    assert "admin" in keys
+    assert "abonnement" in keys
+    assert "archives" not in keys
+
+
+def test_visible_sections_shows_all_with_subscription():
+    keys = {s["key"] for s in shell.visible_sections(has_subscription=True)}
+    assert "archives" in keys
+
+
+def test_guard_redirect_anonymous_goes_to_login():
+    href = shell.guard_redirect(
+        is_authenticated=False,
+        has_subscription=False,
+        require_subscription=False,
+        path="/compte/admin",
+    )
+    assert href == "/connexion?next=/compte/admin"
+
+
+def test_guard_redirect_unsubscribed_on_gated_goes_to_abonnement():
+    href = shell.guard_redirect(
+        is_authenticated=True,
+        has_subscription=False,
+        require_subscription=True,
+        path="/compte/archives",
+    )
+    assert href == "/compte/abonnement"
+
+
+def test_guard_redirect_allowed_returns_none():
+    href = shell.guard_redirect(
+        is_authenticated=True,
+        has_subscription=False,
+        require_subscription=False,
+        path="/compte/admin",
+    )
+    assert href is None