feat: 添加多任务分类配置及对应模型支持

- 添加新的任务分类配置并指定各自对应的模型，以支持前端设计、深度推理、艺术创作等多样化任务需求。

oh-my-opencode.jsonc

@@ -3,12 +3,10 @@
   "agents": {
     "sisyphus": {
       // Primary orchestrator
-      // "model": "anthropic-gateway/claude-opus-4-5-thinking"
       "model": "anthropic-gateway/claude-sonnet-4-5"
     },
     "prometheus": {
       // Strategic planning
-      // "model": "anthropic-gateway/claude-opus-4-5-thinking"
       "model": "anthropic-gateway/claude-sonnet-4-5"
     },
     "atlas": {
@@ -31,5 +29,27 @@
       // PDF/image analysis
       "model": "google-gateway/gemini-3-flash"
     }
+  },
+  "categories": {
+    "visual-engineering": {
+      // 前端 UI/UX 设计任务
+      "model": "google-gateway/gemini-3-pro-high"
+    },
+    "ultrabrain": {
+      // 深度逻辑推理、复杂架构决策
+      "model": "openai-gateway/gpt-5.2"
+    },
+    "artistry": {
+      // 艺术创作任务
+      "model": "google-gateway/gemini-3-pro-high"
+    },
+    "quick": {
+      // 简单快速任务
+      "model": "google-gateway/gemini-3-flash"
+    },
+    "writing": {
+      // 文档写作任务
+      "model": "google-gateway/gemini-3-flash"
+    }
   }
 }