feat: 为各分类添加清晰描述

- 为各个分类添加更清晰的描述，明确每类任务的典型场景和要求。

oh-my-opencode.jsonc

@@ -32,24 +32,31 @@
   },
   "categories": {
     "visual-engineering": {
+      "description": "Frontend, UI/UX, design, styling, animation",
       "model": "cpa-google/gemini-3-pro-high"
     },
     "ultrabrain": {
+      "description": "Deep logical reasoning, complex architecture decisions requiring extensive analysis",
       "model": "cpa-openai/gpt-5.2-codex"
     },
     "artistry": {
+      "description": "Highly creative/artistic tasks, novel ideas",
       "model": "cpa-google/gemini-3-pro-high"
     },
     "quick": {
+      "description": "Trivial tasks - single file changes, typo fixes, simple modifications",
       "model": "cpa-google/gemini-3-flash"
     },
     "unspecified-low": {
+      "description": "Tasks that don't fit other categories, low effort required",
       "model": "cpa-anthropic/claude-sonnet-4-5"
     },
     "unspecified-high": {
+      "description": "Tasks that don't fit other categories, high effort required",
       "model": "cpa-anthropic/claude-opus-4-5-thinking"
     },
     "writing": {
+      "description": "Documentation, prose, technical writing",
       "model": "cpa-google/gemini-3-flash"
     }
   }