fix(settings): use local state in LLMTableRow to avoid props mutation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/settings/LLMTableRow.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, computed } from 'vue'
+import { ref, computed, watch } from 'vue'
 import { Eye, EyeOff, Play, ChevronDown, ChevronRight, Trash2 } from 'lucide-vue-next'
 import type { LLMModelConfig } from '@/api/settings'
 
@@ -17,6 +17,14 @@ const emit = defineEmits<{
 }>()
 
 const showApiKey = ref(false)
+const editingModel = ref<LLMModelConfig>({ ...props.model })
+
+// Reinitialize editing model when expanding (handles editing different rows)
+watch(() => props.isExpanded, (expanded, wasExpanded) => {
+  if (expanded && !wasExpanded) {
+    editingModel.value = { ...props.model }
+  }
+})
 
 const status = computed(() => {
   if (!props.model.api_key || !props.model.model) return 'empty'
@@ -37,8 +45,8 @@ function onProviderChange() {
     claude: 'https://api.anthropic.com',
     deepseek: 'https://api.deepseek.com/v1'
   }
-  if (!props.model.base_url || Object.values(defaults).includes(props.model.base_url)) {
+  if (!editingModel.value.base_url || Object.values(defaults).includes(editingModel.value.base_url)) {
-    emit('update', { ...props.model, base_url: defaults[props.model.provider] || '' })
+    editingModel.value.base_url = defaults[editingModel.value.provider] || ''
   }
 }
 </script>
@@ -69,7 +77,7 @@ function onProviderChange() {
       <div class="form-row">
         <div class="form-group">
           <label>// PROVIDER</label>
-          <select v-model="model.provider" @change="onProviderChange">
+          <select v-model="editingModel.provider" @change="onProviderChange">
             <option value="openai">OpenAI</option>
             <option value="claude">Claude</option>
             <option value="ollama">Ollama</option>
@@ -79,18 +87,18 @@ function onProviderChange() {
         </div>
         <div class="form-group">
           <label>// MODEL</label>
-          <input v-model="model.model" type="text" placeholder="gpt-4o" />
+          <input v-model="editingModel.model" type="text" placeholder="gpt-4o" />
         </div>
       </div>
       <div class="form-group">
         <label>// BASE URL</label>
-        <input v-model="model.base_url" type="text" />
+        <input v-model="editingModel.base_url" type="text" />
       </div>
       <div class="form-group">
         <label>// API KEY</label>
         <div class="input-with-toggle">
           <input
-            v-model="model.api_key"
+            v-model="editingModel.api_key"
             :type="showApiKey ? 'text' : 'password'"
             placeholder="sk-..."
           />
@@ -101,13 +109,13 @@ function onProviderChange() {
         </div>
       </div>
       <div class="panel-actions">
-        <button class="test-btn" @click="emit('test', model)">
+        <button class="test-btn" @click="emit('test', editingModel)">
           <Play :size="12" /> 测试连接
         </button>
         <button
           class="save-btn"
           :disabled="status !== 'available'"
-          @click="emit('update', model)"
+          @click="emit('update', editingModel)"
         >
           保存
         </button>