feat(freelance,itops): P1-P4 智能业务引擎 + PDF 模板

freelance (P1+P3):
- settings: 7 配置项 (公司/财务/提醒)
- trigger_events: 5 个触发事件 (商机/合同/发票/任务/支出)
- cascade: 5 处级联过滤 (合同→商机/报价, 发票→项目/合同, 工时→任务)
- visible_when: 4 处条件显示 (收款日期/已付金额/实际工时/总金额)
- validation: 2 处校验 (手机号/邮箱)
- templates: 3 个 PDF 模板 (报价单/发票/合同)

itops (P2+P4):
- settings: 4 配置项 (SLA/提醒)
- trigger_events: 4 个触发事件 (工单/合同/巡检)
- cascade: 2 处级联过滤 (工单→合同, 巡检记录→合同)
- visible_when: 6 处条件显示 (解决方案/响应时间/解决时间/关闭时间/问题/措施)
- validation: 1 处校验 (合同编号格式)
- templates: 1 个 PDF 模板 (维保合同)

crates/erp-plugin-itops/plugin.toml

@@ -76,6 +76,7 @@ display_name = "维保合同"
   required = true
   display_name = "合同编号"
   unique = true
+  validation = { pattern = "^SC-\\d{4}-\\d{4}$", message = "格式：SC-YYYY-NNNN" }
 
   [[schema.entities.fields]]
   name = "name"
@@ -190,6 +191,8 @@ display_name = "工单"
   ref_entity = "service_contract"
   ref_label_field = "name"
   ref_search_fields = ["name"]
+  cascade_from = "client_id"
+  cascade_filter = "client_id"
 
   [[schema.entities.fields]]
   name = "client_id"
@@ -279,21 +282,25 @@ display_name = "工单"
   field_type = "string"
   display_name = "解决方案"
   ui_widget = "textarea"
+  visible_when = "status == 'resolved' || status == 'closed'"
 
   [[schema.entities.fields]]
   name = "responded_at"
   field_type = "date_time"
   display_name = "首次响应时间"
+  visible_when = "status != 'open'"
 
   [[schema.entities.fields]]
   name = "resolved_at"
   field_type = "date_time"
   display_name = "解决时间"
+  visible_when = "status == 'resolved' || status == 'closed'"
 
   [[schema.entities.fields]]
   name = "closed_at"
   field_type = "date_time"
   display_name = "关闭时间"
+  visible_when = "status == 'closed'"
 
 # ── 3.3.3 check_plan（巡检计划）──
 
@@ -399,6 +406,8 @@ display_name = "巡检记录"
   field_type = "uuid"
   display_name = "维保合同"
   ref_entity = "service_contract"
+  cascade_from = "plan_id"
+  cascade_filter = "contract_id"
 
   [[schema.entities.fields]]
   name = "client_id"
@@ -439,12 +448,14 @@ display_name = "巡检记录"
   field_type = "string"
   display_name = "发现的问题"
   ui_widget = "textarea"
+  visible_when = "result == 'abnormal'"
 
   [[schema.entities.fields]]
   name = "actions_taken"
   field_type = "string"
   display_name = "采取措施"
   ui_widget = "textarea"
+  visible_when = "result == 'abnormal'"
 
   [[schema.entities.fields]]
   name = "notes"
@@ -452,6 +463,70 @@ display_name = "巡检记录"
   display_name = "备注"
   ui_widget = "textarea"
 
+# ── 插件配置 ──
+
+[settings]
+
+  [[settings.fields]]
+  name = "default_sla_response"
+  display_name = "默认SLA响应时间(小时)"
+  field_type = "number"
+  default_value = 8
+  range = [1.0, 72.0]
+  group = "SLA"
+
+  [[settings.fields]]
+  name = "default_sla_resolve"
+  display_name = "默认SLA解决时间(小时)"
+  field_type = "number"
+  default_value = 48
+  range = [1.0, 168.0]
+  group = "SLA"
+
+  [[settings.fields]]
+  name = "notify_sla_breach"
+  display_name = "SLA超标提醒"
+  field_type = "boolean"
+  default_value = true
+  group = "提醒"
+
+  [[settings.fields]]
+  name = "notify_check_due"
+  display_name = "巡检到期提醒"
+  field_type = "boolean"
+  default_value = true
+  group = "提醒"
+
+# ── 触发事件 ──
+
+[[trigger_events]]
+name = "ticket_created"
+display_name = "新工单"
+description = "创建工单时开始SLA计时并通知"
+entity = "ticket"
+on = "create"
+
+[[trigger_events]]
+name = "ticket_status_changed"
+display_name = "工单状态变更"
+description = "工单状态变化时检查SLA是否达标"
+entity = "ticket"
+on = "update"
+
+[[trigger_events]]
+name = "contract_status_changed"
+display_name = "维保合同状态变更"
+description = "合同状态变化时检查到期预警"
+entity = "service_contract"
+on = "update"
+
+[[trigger_events]]
+name = "check_plan_updated"
+display_name = "巡检计划更新"
+description = "巡检计划更新时检查下次巡检日期"
+entity = "check_plan"
+on = "update"
+
 # ── 编号规则 ──
 
 [[numbering]]
@@ -461,6 +536,14 @@ prefix = "SC"
 format = "{PREFIX}-{YEAR}-{SEQ}"
 seq_length = 4
 
+# ── 打印模板 ──
+
+[[templates]]
+name = "service_contract_pdf"
+display_name = "维保合同"
+entity = "service_contract"
+format = "pdf"
+
 # ── 页面设计 ──
 
 # 页面 1：合同管理 + 详情