feat: add guided exploration and share user-started MCP backend

tests/unit/test_exploration_exports.py

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+from apps.admin_console.services.automation_store import AutomationStore
+from apps.admin_console.services import exploration_evidence
+from artemis.config.exploration import ExplorationConfig
+from artemis.exploration.models import CaseDraft
+from artemis.exploration.store import ExplorationStore
+
+
+def test_archive_links_only_current_run_media_and_keeps_case_provenance(tmp_path, monkeypatch):
+    repository = ExplorationStore(AutomationStore(tmp_path / "history.db"))
+    session = repository.create("探索", ExplorationConfig(), {}, "create")
+    first = repository.reserve_run(
+        session["id"], "first", kind="exploration", goal="探索", task_config={}
+    )
+    repository.finish_run(first["id"], {"status": "completed"})
+    second = repository.reserve_run(
+        session["id"], "second", kind="exploration", goal="继续", task_config={}
+    )
+    repository.finish_run(second["id"], {"status": "completed"})
+    repository.save_case(
+        session["id"],
+        CaseDraft(name="用例", goal="已保存提示词"),
+        0,
+        "save",
+        source_run_id=second["id"],
+    )
+    for run in (first, second):
+        repository.database.put(
+            "exploration_demo",
+            run["id"],
+            {
+                "id": run["id"],
+                "exploration_id": session["id"],
+                "run_id": run["id"],
+                "media": [{"kind": "android", "segments": [{"file": "evidence/demo.mp4"}]}],
+            },
+        )
+    monkeypatch.setattr(exploration_evidence, "explorations", repository)
+    monkeypatch.setattr(exploration_evidence, "task_root", lambda _: tmp_path)
+    index = exploration_evidence.exploration_index(
+        second["id"], {(tmp_path / "evidence/demo.mp4").resolve(): "任务录屏/人工示范/demo.mp4"}
+    )
+    old, current = index["demonstrations"]
+    assert old["media"][0]["segments"][0]["file"] is None
+    assert current["media"][0]["segments"][0]["file"] == "任务录屏/人工示范/demo.mp4"
+    assert current["media"][0]["segments"][0]["trace_file"] == "evidence/demo.mp4"
+    assert index["cases"][0]["source_run_id"] == second["id"]
+    assert (
+        repository.database.get("exploration_demo", second["id"])["media"][0]["segments"][0]["file"]
+        == "evidence/demo.mp4"
+    )