fix(gui): clarifier aide et disponibilite moteurs

Passe theme clair, libelles utilisateur, aides conteneurs, recherche de mise a jour et indication honnete des moteurs optionnels non embarques. Tests GUI unitaires: 126 passed.

tests/unit/test_gui_v6_engine_bridge.py

@@ -57,7 +57,11 @@ def test_kwargs_defaults_v5_like():
 def test_kwargs_with_loaded_managers():
     settings = EngineSettings(enable_eds=True, enable_gliner=True)
     counter = {"camembert": 0, "eds": 0, "gliner": 0}
-    managers = NerManagers(settings, factories=_counting_factories(counter))
+    managers = NerManagers(
+        settings,
+        factories=_counting_factories(counter),
+        caps_provider=_caps_provider(eds_ok=True, gliner_ok=True),
+    )
     managers.ensure_loaded()
     kwargs = build_engine_kwargs(settings, managers)
     assert kwargs["use_hf"] is True
@@ -89,7 +93,11 @@ def test_managers_not_loaded_on_init():
 def test_managers_load_once_and_state():
     settings = EngineSettings(enable_eds=True)
     counter = {"camembert": 0, "eds": 0, "gliner": 0}
-    managers = NerManagers(settings, factories=_counting_factories(counter))
+    managers = NerManagers(
+        settings,
+        factories=_counting_factories(counter),
+        caps_provider=_caps_provider(eds_ok=True, gliner_ok=True),
+    )
     assert managers.state == ManagerState.NOT_LOADED
     assert managers.ensure_loaded() == ManagerState.READY
     assert managers.ensure_loaded() == ManagerState.READY  # idempotent
@@ -121,7 +129,11 @@ def test_optional_manager_failure_is_tolerated():
 
         return {"camembert": camembert, "eds": eds, "gliner": gliner}
 
-    managers = NerManagers(settings, factories=factories())
+    managers = NerManagers(
+        settings,
+        factories=factories(),
+        caps_provider=_caps_provider(eds_ok=True, gliner_ok=True),
+    )
     assert managers.ensure_loaded() == ManagerState.READY  # gliner ko ne bloque pas
     assert managers.use_hf is True