feat: Refactor services architecture and update project structure

- Remove Docker-based microservices (docker-compose.yml, Makefile, Dockerfiles)
- Update start-dev.sh to use backend.app:app entry point
- Add shared schema and client modules for service communication
- Add team coordination modules (messenger, registry, task_delegator, coordinator)
- Add evaluation hooks and skill adaptation hooks
- Add skill template and gateway server
- Update frontend WebSocket URL configuration
- Add explain components for insider and technical analysis

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/tests/test_heartbeat_hook.py

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+"""Tests for HeartbeatHook."""
+import tempfile
+from pathlib import Path
+
+import pytest
+
+from backend.agents.base.hooks import HeartbeatHook
+
+
+class TestHeartbeatHook:
+    """Tests for HeartbeatHook._read_heartbeat_content."""
+
+    def test_read_heartbeat_content_with_content(self, tmp_path):
+        """Test reading HEARTBEAT.md when it exists and has content."""
+        ws_dir = tmp_path / "analyst_workspace"
+        ws_dir.mkdir()
+        hb_file = ws_dir / "HEARTBEAT.md"
+        hb_file.write_text("# 定期主动检查\n\n- [ ] 持仓是否健康\n", encoding="utf-8")
+
+        hook = HeartbeatHook(workspace_dir=ws_dir)
+        content = hook._read_heartbeat_content()
+
+        assert content is not None
+        assert "# 定期主动检查" in content
+        assert "持仓是否健康" in content
+
+    def test_read_heartbeat_content_absent(self, tmp_path):
+        """Test reading when HEARTBEAT.md does not exist."""
+        ws_dir = tmp_path / "analyst_workspace"
+        ws_dir.mkdir()
+
+        hook = HeartbeatHook(workspace_dir=ws_dir)
+        content = hook._read_heartbeat_content()
+
+        assert content is None
+
+    def test_read_heartbeat_content_empty(self, tmp_path):
+        """Test reading when HEARTBEAT.md is empty."""
+        ws_dir = tmp_path / "analyst_workspace"
+        ws_dir.mkdir()
+        hb_file = ws_dir / "HEARTBEAT.md"
+        hb_file.write_text("", encoding="utf-8")
+
+        hook = HeartbeatHook(workspace_dir=ws_dir)
+        content = hook._read_heartbeat_content()
+
+        assert content is None
+
+    def test_read_heartbeat_content_whitespace_only(self, tmp_path):
+        """Test reading when HEARTBEAT.md contains only whitespace."""
+        ws_dir = tmp_path / "analyst_workspace"
+        ws_dir.mkdir()
+        hb_file = ws_dir / "HEARTBEAT.md"
+        hb_file.write_text("   \n\n  ", encoding="utf-8")
+
+        hook = HeartbeatHook(workspace_dir=ws_dir)
+        content = hook._read_heartbeat_content()
+
+        assert content is None
+
+    def test_completed_flag_path(self, tmp_path):
+        """Test that completion flag is placed in workspace directory."""
+        ws_dir = tmp_path / "analyst_workspace"
+        ws_dir.mkdir()
+
+        hook = HeartbeatHook(workspace_dir=ws_dir)
+
+        assert hook._completed_flag == ws_dir / ".heartbeat_completed"