feat: rebuild as multi-user web agent

tests/test_store.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from agent_platform.store import RuntimeStore
+
+
+async def test_conversation_mode_upgrade_is_one_way(settings) -> None:
+    store = RuntimeStore(settings.database_url)
+    await store.initialize()
+    try:
+        assert await store.select_mode("u1", "c1", "chat") == "chat"
+        assert await store.select_mode("u1", "c1", "work") == "work"
+        assert await store.select_mode("u1", "c1", "chat") == "work"
+        assert await store.select_mode("u2", "c1", "chat") == "chat"
+    finally:
+        await store.close()
+
+
+async def test_memory_and_events_are_user_scoped(settings) -> None:
+    store = RuntimeStore(settings.database_url)
+    await store.initialize()
+    try:
+        memory_id = await store.remember("u1", "prefers compact answers")
+        assert [item["id"] for item in await store.recall("u1", "compact")] == [memory_id]
+        assert await store.recall("u2", "compact") == []
+
+        await store.append_event("r1", "u1", "c1", 1, "run.created", {"x": 1})
+        await store.append_event("r2", "u2", "c1", 1, "run.created", {"x": 2})
+        assert [event["payload"]["x"] for event in await store.events_for_chat("u1", "c1")] == [1]
+    finally:
+        await store.close()