feat(规则管理): 添加主题规则自动发现设备功能

实现设备自动发现规则管理系统，包含以下主要功能：
1. 新增规则管理页面和API，支持创建、编辑和删除主题匹配规则
2. 添加规则匹配引擎，支持+和#通配符匹配设备主题
3. 实现Broker设备注册表，自动发现并管理符合规则的设备
4. 扩展仪表盘显示Broker信息和活跃主题
5. 修改设备卡片和详情页以区分规则发现的设备
6. 添加相关测试用例确保功能稳定性

tests/test_rule_registry.py

@@ -0,0 +1,66 @@
+import pytest
+from mqtt_home.rule_registry import list_rules, get_rule, create_rule, update_rule, delete_rule
+from mqtt_home.schemas import RuleCreate, RuleUpdate
+
+
+@pytest.mark.asyncio
+async def test_create_rule(db_session):
+    rule = await create_rule(db_session, RuleCreate(
+        name="Test Rule",
+        topic_pattern="home/+/state",
+        device_type="switch",
+        command_template="home/{device_id}/set",
+        state_value_path="state",
+    ))
+    assert rule.id is not None
+    assert rule.name == "Test Rule"
+    assert rule.topic_pattern == "home/+/state"
+    assert rule.is_enabled is True
+
+
+@pytest.mark.asyncio
+async def test_list_rules(db_session):
+    await create_rule(db_session, RuleCreate(name="Rule 1", topic_pattern="a/+"))
+    await create_rule(db_session, RuleCreate(name="Rule 2", topic_pattern="b/+"))
+    rules = await list_rules(db_session)
+    assert len(rules) == 2
+
+
+@pytest.mark.asyncio
+async def test_get_rule(db_session):
+    created = await create_rule(db_session, RuleCreate(name="Test", topic_pattern="x/+"))
+    rule = await get_rule(db_session, created.id)
+    assert rule is not None
+    assert rule.name == "Test"
+
+
+@pytest.mark.asyncio
+async def test_get_rule_not_found(db_session):
+    rule = await get_rule(db_session, 99999)
+    assert rule is None
+
+
+@pytest.mark.asyncio
+async def test_update_rule(db_session):
+    created = await create_rule(db_session, RuleCreate(name="Original", topic_pattern="x/+"))
+    updated = await update_rule(db_session, created.id, RuleUpdate(name="Updated"))
+    assert updated.name == "Updated"
+    assert updated.topic_pattern == "x/+"  # unchanged
+
+
+@pytest.mark.asyncio
+async def test_update_rule_not_found(db_session):
+    result = await update_rule(db_session, 99999, RuleUpdate(name="X"))
+    assert result is None
+
+
+@pytest.mark.asyncio
+async def test_delete_rule(db_session):
+    created = await create_rule(db_session, RuleCreate(name="To Delete", topic_pattern="x/+"))
+    assert await delete_rule(db_session, created.id) is True
+    assert await get_rule(db_session, created.id) is None
+
+
+@pytest.mark.asyncio
+async def test_delete_rule_not_found(db_session):
+    assert await delete_rule(db_session, 99999) is False