Support selectable demo exchanges and configurable analysis limits

Persist manual requests until exchange confirmation, preserve stop protection, and reconcile fills before settling plans. Tighten model stream, crawler, skill, research accounting, and frontend race handling, with regression coverage. Keep queued analyses pending until a fresh account snapshot is available.

backend/tests/test_failure_paths.py

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+import asyncio
+import json
+import uuid
+from datetime import UTC, datetime, timedelta
+from types import SimpleNamespace
+
+import httpx
+import httpx2
+import pytest
+
+
+def install_model_transport(llm, monkeypatch, protocol, handler):
+    monkeypatch.setattr(llm, "decrypt", lambda value: "test-only")
+    module = llm.openai if protocol == "openai" else llm.anthropic
+    name = "AsyncOpenAI" if protocol == "openai" else "AsyncAnthropic"
+    constructor = getattr(module, name)
+    http = httpx if protocol == "openai" else httpx2
+    monkeypatch.setattr(module, name, lambda **kwargs: constructor(**kwargs, http_client=http.AsyncClient(transport=http.MockTransport(handler))))
+    return SimpleNamespace(protocol=protocol, base_url="https://model.invalid", api_key_encrypted=b"test", model="test", max_tokens=100)
+
+
+@pytest.mark.parametrize("protocol", ["openai", "anthropic"])
+@pytest.mark.parametrize("complete", [False, True])
+def test_model_requires_protocol_end_marker(trading, monkeypatch, protocol, complete):
+    from alphapulse.ai import llm
+    if protocol == "openai":
+        chunks = [{"id": "1", "object": "chat.completion.chunk", "created": 0, "model": "test", "choices": [{"index": 0, "delta": {"content": "部分回答"}, "finish_reason": None}]}]
+        if complete:
+            chunks.append(chunks[0] | {"choices": [{"index": 0, "delta": {}, "finish_reason": "stop"}]})
+        body = "".join(f"data: {json.dumps(c)}\n\n" for c in chunks) + "data: [DONE]\n\n"
+    else:
+        events = [
+            {"type": "message_start", "message": {"id": "1", "type": "message", "role": "assistant", "model": "test", "content": [], "stop_reason": None, "stop_sequence": None, "usage": {"input_tokens": 1, "output_tokens": 0}}},
+            {"type": "content_block_start", "index": 0, "content_block": {"type": "text", "text": ""}},
+            {"type": "content_block_delta", "index": 0, "delta": {"type": "text_delta", "text": "部分回答"}},
+            {"type": "message_delta", "delta": {"stop_reason": "end_turn", "stop_sequence": None}, "usage": {"output_tokens": 1}},
+        ]
+        if complete:
+            events.append({"type": "message_stop"})
+        body = "".join(f"event: {e['type']}\ndata: {json.dumps(e)}\n\n" for e in events)
+
+    def handle(request):
+        http = httpx if protocol == "openai" else httpx2
+        return http.Response(200, headers={"content-type": "text/event-stream"}, content=body.encode())
+
+    provider = install_model_transport(llm, monkeypatch, protocol, handle)
+    async def check():
+        output = []
+        try:
+            async for item in llm.stream(provider, "system", [], []):
+                output.append(item)
+        except llm.LlmError:
+            assert not complete
+        else:
+            assert complete
+        assert [x.text for x in output if isinstance(x, llm.TextDelta)] == ["部分回答"]
+        assert any(isinstance(x, llm.Completion) for x in output) == complete
+    asyncio.run(check())
+
+
+def test_connection_failure_uses_only_sdk_retry_budget(trading, monkeypatch):
+    from alphapulse.ai import llm
+    attempts = 0
+    def handle(request):
+        nonlocal attempts
+        attempts += 1
+        raise httpx.ConnectError("测试连接失败", request=request)
+    provider = install_model_transport(llm, monkeypatch, "openai", handle)
+    async def check():
+        with pytest.raises(llm.LlmError, match="无法连接"):
+            async for _ in llm.stream(provider, "system", [], []):
+                pass
+    asyncio.run(check())
+    assert attempts == llm.MAX_RETRIES + 1
+
+
+def test_pipeline_error_keeps_history_checkpoint_and_marks_run_failed(trading, monkeypatch):
+    from scrapy import signals
+    from scrapy.crawler import Crawler
+    from twisted.python.failure import Failure
+    from alphapulse.crawler.spiders import base
+
+    class Spider(base.NewsSpider):
+        name = "test"
+
+    now = datetime.now(UTC)
+    target, checkpoint = now - timedelta(days=10), now - timedelta(days=1)
+    source = SimpleNamespace(history_target=target, history_position=checkpoint, consecutive_failures=0)
+    writes = []
+    class Session:
+        async def __aenter__(self):
+            return self
+        async def __aexit__(self, *args):
+            pass
+        async def execute(self, statement):
+            writes.append(statement.compile().params)
+        async def get(self, *args, **kwargs):
+            return source
+        async def commit(self):
+            pass
+    monkeypatch.setattr(base, "SessionLocal", Session)
+    async def check():
+        crawler = Crawler(Spider)
+        spider = Spider.from_crawler(crawler)
+        run = base.RunState(uuid.uuid4(), "history", now, target, history_target=target, history_position=target)
+        spider.run = run
+        crawler.signals.send_catch_log(signals.item_error, item={}, response=None, spider=spider, failure=Failure(RuntimeError("写库失败")))
+        spider._close_run()
+        await asyncio.gather(*spider._tasks)
+        assert spider.history_checkpoint is None and source.history_position == checkpoint
+        assert source.consecutive_failures == 1
+        assert writes[0]["status"] == "failed" and "写库失败" in writes[0]["error"]
+    asyncio.run(check())
+
+
+@pytest.mark.parametrize("failure_at", ["usage", "second_tool"])
+def test_chat_completes_tool_results_on_disconnect_or_exception(trading, monkeypatch, failure_at):
+    from alphapulse.api import chat
+    provider = SimpleNamespace(id=1, context_window=10000, max_tokens=100, name="test", reasoning_effort=None)
+    class Session:
+        async def __aenter__(self):
+            return self
+        async def __aexit__(self, *args):
+            pass
+        async def scalar(self, *args):
+            return provider
+        def expunge(self, *args):
+            pass
+    async def current(*args):
+        return SimpleNamespace(id=1)
+    async def system(*args):
+        return "system"
+    async def history(*args):
+        return []
+    saved = []
+    async def save(*messages):
+        saved.extend(messages)
+    calls = [{"id": "a", "name": "first", "arguments": {}}, {"id": "b", "name": "second", "arguments": {}}]
+    async def stream(*args):
+        yield chat.llm.Completion(tool_calls=calls)
+    async def tool(name, args):
+        if name == "second":
+            raise RuntimeError("工具失败")
+        return chat.ToolOutcome("实际结果")
+    monkeypatch.setattr(chat, "SessionLocal", Session)
+    monkeypatch.setattr(chat, "active_session", current)
+    monkeypatch.setattr(chat, "build_system_prompt", system)
+    monkeypatch.setattr(chat, "session_messages", history)
+    monkeypatch.setattr(chat, "save_messages", save)
+    monkeypatch.setattr(chat.llm, "stream", stream)
+    monkeypatch.setattr(chat, "run_tool", tool)
+    async def check():
+        generator = chat.send_message(chat.SendIn(text="test"))
+        events = []
+        async for event in generator:
+            events.append(event.event)
+            if failure_at == "usage" and event.event == "usage":
+                await generator.aclose()
+                break
+        results = [m.content for m in saved if m.role == "tool"]
+        assert [r["tool_call_id"] for r in results] == ["a", "b"]
+        if failure_at == "second_tool":
+            assert results[0]["result"] == "实际结果"
+            assert "error" in json.loads(results[1]["result"])
+            assert events[-1] == "error"
+    asyncio.run(check())
+
+
+def test_skill_rename_rejects_whitespace_without_writing(trading):
+    from fastapi import HTTPException
+    from alphapulse.api import skills
+    node = SimpleNamespace(name="原名称")
+    class Session:
+        async def get(self, *args):
+            return node
+    async def check():
+        with pytest.raises(HTTPException) as error:
+            await skills.patch(1, skills.NodePatch(name=" \t "), Session())
+        assert error.value.status_code == 400
+        assert node.name == "原名称"
+    asyncio.run(check())