chore: 将 quick 分类模型切换至 GPT-5.4 mini

oh-my-opencode.jsonc

@@ -18,7 +18,7 @@
     "ultrabrain": { "model": "openai/gpt-5.4", "variant": "xhigh" },
     "deep": { "model": "openai/gpt-5.3-codex", "variant": "medium" },
     "artistry": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
-    "quick": { "model": "anthropic/claude-haiku-4-5" },
+    "quick": { "model": "openai/gpt-5.4-mini" },
     "unspecified-low": { "model": "anthropic/claude-sonnet-4-6" },
     "unspecified-high": { "model": "anthropic/claude-opus-4-6", "variant": "high" },
     "writing": { "model": "google/gemini-3-flash-preview" }

opencode.jsonc

@@ -50,6 +50,12 @@
           "reasoning": true,
           "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
           "limit": { "context": 400000, "input": 272000, "output": 128000 }
+        },
+        "gpt-5.4-mini": {
+          "name": "GPT-5.4 mini",
+          "reasoning": true,
+          "modalities": { "input": ["text", "image"], "output": ["text"] },
+          "limit": { "context": 400000, "input": 272000, "output": 128000 }
         }
       }
     },