fix: add models section to opencode.json config

The opencode-qwen-auth plugin requires a 'models' section in the
provider config. Adding proper model definitions for qwen3.6-plus-free
and minimax-m2.5-free to prevent TypeError: provider.models undefined

start.sh

@@ -52,6 +52,24 @@ if [ ! -f ~/.config/opencode/opencode.json ]; then
     "openai": {
       "options": {
         "baseUrl": "http://92.5.60.87:4100/v1"
+      },
+      "models": {
+        "qwen3.6-plus-free": {
+          "name": "Qwen 3.5 Plus Free",
+          "id": "qwen3.6-plus-free",
+          "limit": {
+            "context": 32000,
+            "output": 8000
+          }
+        },
+        "minimax-m2.5-free": {
+          "name": "MiniMax M2.5 Free",
+          "id": "minimax-m2.5-free",
+          "limit": {
+            "context": 32000,
+            "output": 8000
+          }
+        }
       }
     }
   }