fix(utils): 解决数字转换异常问题

- 修改DecimalAdapter中字符串转double的逻辑，使用安全转换避免崩溃
- 更新PrepareCookActivity中重量验证逻辑，使用安全转换处理无效输入
- 防止因无效数字格式导致的应用崩溃问题

app/src/main/java/com/shuwei/dish/match/ui/PrepareCookActivity.kt

@@ -98,7 +98,7 @@ class PrepareCookActivity : BaseActivity() {
                     return@setOnClickListener
                 }
             }
-            val weight = binding.tvDishPartWeight.text.toString().toDouble()
+            val weight = binding.tvDishPartWeight.text.toString().toDoubleOrNull() ?:0.toDouble()
             if (weight <= 0.toDouble()) {
                 toast("食材用量需要大于0")
                 return@setOnClickListener

app/src/main/java/com/shuwei/dish/match/utils/DecimalAdapter.kt

@@ -14,7 +14,7 @@ class DecimalAdapter : TypeAdapter<Number>() {
     override fun read(reader: JsonReader): Number {
         return when (reader.peek()) {
             JsonToken.NUMBER -> reader.nextDouble()
-            JsonToken.STRING -> reader.nextString().toDouble()
+            JsonToken.STRING -> reader.nextString().toDoubleOrNull() ?: 0.0
             else -> 0.0
         }
     }