feat(vwb): preview lea competence workflows

tests/unit/test_competence_to_vwb_preview.py

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+from flask import Flask
+
+from visual_workflow_builder.backend.services.competence_vwb_preview import (
+    competence_yaml_to_vwb_preview,
+    competence_yaml_to_vwb_steps,
+)
+
+
+def _by_type(preview):
+    return [step["action_type"] for step in preview["steps"]]
+
+
+def test_competence_to_vwb_preview_key_win_r_steps():
+    preview = competence_yaml_to_vwb_preview("key_win_r_wait_explorer_exe")
+
+    assert preview["readonly"] is True
+    assert preview["write_back_enabled"] is False
+    assert preview["workflow"]["competence_id"] == "key_win_r_wait_explorer_exe"
+    assert _by_type(preview) == [
+        "pause_for_human",
+        "keyboard_shortcut",
+        "wait_for_state",
+        "pause_for_human",
+    ]
+
+
+def test_keyboard_shortcut_keys_are_preserved():
+    steps = competence_yaml_to_vwb_steps("key_win_r_wait_explorer_exe")
+    shortcut = steps[1]
+
+    assert shortcut["action_type"] == "keyboard_shortcut"
+    assert shortcut["parameters"]["keys"] == ["win", "r"]
+    assert shortcut["parameters"]["source"] == (
+        "lea_competence:key_win_r_wait_explorer_exe"
+    )
+    assert shortcut["parameters"]["source_method_id"] == "step_1_key_combo"
+
+
+def test_wait_for_state_expected_state_is_preserved():
+    steps = competence_yaml_to_vwb_steps("key_win_r_wait_explorer_exe")
+    wait_step = steps[2]
+
+    assert wait_step["action_type"] == "wait_for_state"
+    params = wait_step["parameters"]
+    assert params["expected_state"]["window_title_in"] == ["Ex\u00e9cuter"]
+    assert params["expected_state"]["process_active"] == "explorer.exe"
+    assert params["timeout_ms"] == 5000
+    assert params["poll_interval_ms"] == 250
+    assert params["evidence_required"] == "window_or_process"
+
+
+def test_pause_for_human_before_and_after_are_supervision_only():
+    steps = competence_yaml_to_vwb_steps("key_win_r_wait_explorer_exe")
+
+    before = steps[0]
+    after = steps[-1]
+    assert before["parameters"]["phase"] == "before"
+    assert before["parameters"]["verdict_required"] is False
+    assert after["parameters"]["phase"] == "after"
+    assert after["parameters"]["verdict_required"] is True
+    assert after["parameters"]["write_back_enabled"] is False
+
+
+def test_adapter_is_generic_on_methods_not_hardcoded_to_win_r():
+    steps = competence_yaml_to_vwb_steps("key_ctrl_s_wait_notepad_exe")
+
+    assert [step["action_type"] for step in steps] == [
+        "pause_for_human",
+        "keyboard_shortcut",
+        "wait_for_state",
+        "pause_for_human",
+    ]
+    assert steps[1]["parameters"]["keys"] == ["ctrl", "s"]
+    assert steps[2]["parameters"]["expected_state"]["window_title_in"] == [
+        "Enregistrer sous"
+    ]
+    assert steps[2]["parameters"]["expected_state"]["process_active"] == "Notepad.exe"
+
+
+def test_preview_endpoint_returns_read_only_workflow():
+    from visual_workflow_builder.backend.catalog_routes_v2_vlm import (
+        competence_preview_bp,
+    )
+
+    app = Flask(__name__)
+    app.register_blueprint(competence_preview_bp)
+
+    with app.test_client() as client:
+        response = client.post(
+            "/api/vwb/competences/key_win_r_wait_explorer_exe/preview",
+            json={"supervised": True},
+        )
+
+    assert response.status_code == 200
+    data = response.get_json()
+    assert data["success"] is True
+    assert data["readonly"] is True
+    assert data["write_back_enabled"] is False
+    assert data["workflow"]["source"] == "lea_competence_preview"
+    assert [step["action_type"] for step in data["steps"]] == [
+        "pause_for_human",
+        "keyboard_shortcut",
+        "wait_for_state",
+        "pause_for_human",
+    ]