feat(omo): add OMO Slim (oh-my-opencode-slim) support

Implement full OMO Slim profile management to align with ai-toolbox:
- Backend: Slim service methods, DAO, Tauri commands, plugin conflict handling
- Frontend: types, API, query hooks, form integration with isSlim parameterization
- Slim variant: 6 agents (no categories), separate config file and plugin name
- Mutual exclusion: standard OMO and Slim cannot coexist as plugins
- i18n: zh/en/ja translations for all Slim agent descriptions

src/types.ts

@@ -4,7 +4,8 @@ export type ProviderCategory =
   | "aggregator" // 聚合网站
   | "third_party" // 第三方供应商
   | "custom" // 自定义
-  | "omo"; // Oh My OpenCode
+  | "omo" // Oh My OpenCode
+  | "omo-slim"; // Oh My OpenCode Slim
 
 export interface Provider {
   id: string;