feat(server): erp-ai 模块集成 — Config/State/路由注册

- 新增 AiConfig 到 AppConfig
- 新增 FromRef<AppState> for AiState
- 注册 AiModule 到 ModuleRegistry
- 合并 AI protected routes
- 修复 sync_module_permissions 只同步 health.% 的 bug

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

crates/erp-server/Cargo.toml

@@ -28,6 +28,7 @@ erp-workflow.workspace = true
 erp-message.workspace = true
 erp-plugin.workspace = true
 erp-health.workspace = true
+erp-ai.workspace = true
 anyhow.workspace = true
 uuid.workspace = true
 chrono.workspace = true