refactor: 统一模型配置并更新代理与分类模型设置

- 更新所有代理和分类的模型配置，统一使用新的CPA模型标识并新增未指定级别的高低优先级模型设置。
- 移除旧的 GLM 和 Claude 模型配置，替换为新的 Packy OpenAI 模型配置，并更新模型名称和版本。

oh-my-opencode.jsonc

@@ -3,15 +3,15 @@
   "agents": {
     "sisyphus": {
       // Primary orchestrator
-      "model": "packycode-anthropic/claude-opus-4-5-20251101"
+      "model": "cpa-anthropic/claude-opus-4-5-thinking"
     },
     "prometheus": {
       // Strategic planning
-      "model": "packycode-anthropic/claude-opus-4-5-20251101"
+      "model": "cpa-anthropic/claude-opus-4-5-thinking"
     },
     "atlas": {
       // Master orchestrator
-      "model": "packycode-anthropic/claude-sonnet-4-5-20250929"
+      "model": "cpa-anthropic/claude-opus-4-5-thinking"
     },
     "oracle": {
       // Consultation, debugging
@@ -32,23 +32,24 @@
   },
   "categories": {
     "visual-engineering": {
-      // 前端 UI/UX 设计任务
       "model": "cpa-google/gemini-3-pro-high"
     },
     "ultrabrain": {
-      // 深度逻辑推理、复杂架构决策
       "model": "cpa-openai/gpt-5.2-codex"
     },
     "artistry": {
-      // 艺术创作任务
       "model": "cpa-google/gemini-3-pro-high"
     },
     "quick": {
-      // 简单快速任务
       "model": "cpa-google/gemini-3-flash"
     },
+    "unspecified-low": {
+      "model": "cpa-anthropic/claude-sonnet-4-5"
+    },
+    "unspecified-high": {
+      "model": "cpa-anthropic/claude-opus-4-5-thinking"
+    },
     "writing": {
-      // 文档写作任务
       "model": "cpa-google/gemini-3-flash"
     }
   }