feat(beads): integrate Beads Mode backend, MCP tools, and GUI support

tests/test_mcp_client_beads.py

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+import pytest
+import tempfile
+from pathlib import Path
+from src import mcp_client
+from src import beads_client
+
+def test_bd_mcp_tools(tmp_path: Path):
+    # Setup mock workspace
+    workspace_dir = tmp_path / "workspace"
+    workspace_dir.mkdir()
+    
+    # Configure mcp client allowlist
+    mcp_client.configure([{"path": str(workspace_dir)}], extra_base_dirs=[str(workspace_dir)])
+    
+    # Initialize Beads repo manually to simulate state
+    bclient = beads_client.BeadsClient(workspace_dir)
+    bclient.init_repo()
+    
+    # Tools should be registered
+    tools = mcp_client.get_tool_schemas()
+    tool_names = [t["name"] for t in tools]
+    assert "bd_create" in tool_names
+    assert "bd_update" in tool_names
+    assert "bd_list" in tool_names
+    
+    # Test bd_create
+    resp = mcp_client.dispatch("bd_create", {"title": "First Bead", "description": "This is a test bead"})
+    assert "bead-1" in resp
+    
+    # Test bd_list
+    list_resp = mcp_client.dispatch("bd_list", {})
+    assert "bead-1" in list_resp
+    assert "First Bead" in list_resp
+    
+    # Test bd_ready
+    ready_resp = mcp_client.dispatch("bd_ready", {})
+    assert ready_resp == "READY"
+    
+    # Test bd_update
+    update_resp = mcp_client.dispatch("bd_update", {"bead_id": "bead-1", "status": "completed"})
+    assert "bead-1" in update_resp
+    
+    # Test bd_list after update
+    list_resp2 = mcp_client.dispatch("bd_list", {})
+    assert "Status: completed" in list_resp2