refactor: split flat core into capability packages, layer the conversations service, English defaults for every model-facing text

tests/test_api.py

@@ -18,11 +18,11 @@ from claude_agent_sdk import (
 from httpx import ASGITransport, AsyncClient
 from test_conversations import ScriptedClient, World
 
-from beaver_gateway.core.conversation_store import rewrite_messages
-from beaver_gateway.core.auth import TokenStore
-from beaver_gateway.core.registry import McpRegistry
-from beaver_gateway.core.scheduler import Job, JobRun, Scheduler
-from beaver_gateway.core.transcript import build_entries
+from beaver_gateway.frontends.markdown.history import rewrite_messages
+from beaver_gateway.security.auth import TokenStore
+from beaver_gateway.app import McpRegistry
+from beaver_gateway.jobs.scheduler import Job, JobRun, Scheduler
+from beaver_gateway.backends.transcript import build_entries
 from beaver_gateway.frontends.admin import AdminFrontend
 from beaver_gateway.frontends.admin.frontend import build_app as build_admin
 from beaver_gateway.frontends.api import ApiFrontend
@@ -473,7 +473,7 @@ async def test_close_distills_a_deep_chat(world: World) -> None:
     assert body["digest"] == str(config.dir / "2026-08-29 - тема.md")
     assert body["text"].count("\n") == 2
     assert (await world.conversations.get(chat.external_id)).status == "closed"
-    assert (await world.conversations.queue.recent(master.id))[0].origin == "выжимка"
+    assert (await world.conversations.queue.recent(master.id))[0].origin == "digest"
     again = await api.http.post(
         f"/conversations/{chat.external_id}/close", headers=HEADERS
     )