feat: 调料弹窗新增重置按钮 + 清空按钮改为重量归零

- 下拉选择框右侧新增"重置"按钮，点击清除调料选择
- "清空"按钮行为调整：仅将重量归零，保留调料名称
- 信息格(油)重置恢复默认1000g，清空归零

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

other-module/canteen-device/ratio-scale/04-seasoning-settings.html

@@ -129,7 +129,15 @@
       font-size: 11px; padding: 2px 8px; border-radius: 4px;
       background: rgba(74,144,217,0.15); color: #4a90d9; font-weight: 600;
     }
-    .select-panel__select-wrap { position: relative; }
+    .select-panel__select-wrap { position: relative; flex: 1; }
+    .select-panel__select-row { display: flex; gap: 8px; align-items: center; }
+    .select-panel__btn--reset-inline {
+      padding: 10px 14px; border-radius: 8px; font-size: 13px; font-weight: 600;
+      cursor: pointer; transition: all 0.2s; border: none; font-family: inherit; flex-shrink: 0;
+      background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.5);
+      border: 1px solid rgba(255,255,255,0.1);
+    }
+    .select-panel__btn--reset-inline:hover { background: rgba(255,255,255,0.1); color: #fff; }
     .select-panel__select {
       width: 100%; padding: 10px 14px; background: #121832;
       border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
@@ -220,11 +228,14 @@
         选择调料
         <span class="select-panel__pos-tag" id="posTag">位置 --</span>
       </div>
-      <div class="select-panel__select-wrap">
-        <select class="select-panel__select" id="seasoningSelect">
-          <option value="">-- 请选择调料 --</option>
-        </select>
-        <span class="select-panel__select-arrow">&#x25BC;</span>
+      <div class="select-panel__select-row">
+        <div class="select-panel__select-wrap">
+          <select class="select-panel__select" id="seasoningSelect">
+            <option value="">-- 请选择调料 --</option>
+          </select>
+          <span class="select-panel__select-arrow">&#x25BC;</span>
+        </div>
+        <button class="select-panel__btn--reset-inline" id="resetInlineBtn" onclick="resetSlot()">重置</button>
       </div>
       <div class="select-panel__weight-row">
         <span class="select-panel__weight-label">放置重量:</span>
@@ -351,14 +362,14 @@
     function openSelect(pos) {
       editingPos = pos;
       document.getElementById('posTag').textContent = pos === 0 ? '信息格 (油)' : '位置 ' + pos;
-      /* 信息格时调整标题和按钮 */
-      var clearBtn = document.querySelector('.select-panel__btn--clear');
+      /* 信息格时调整标题 */
+      var resetBtn = document.getElementById('resetInlineBtn');
       if (pos === 0) {
         document.querySelector('.select-panel__title').firstChild.textContent = '修改油量 ';
-        clearBtn.textContent = '重置';
+        resetBtn.textContent = '恢复默认';
       } else {
         document.querySelector('.select-panel__title').firstChild.textContent = '选择调料 ';
-        clearBtn.textContent = '清空';
+        resetBtn.textContent = '重置';
       }
 
       /* 填充下拉选项 */
@@ -414,20 +425,42 @@
       showToast('位置 ' + editingPos + ' 已配置为 ' + name + ' (' + weight + 'g)', 1500, 'success');
     }
 
-    /* 清空位置 */
+    /* 清空位置（重量归零，保留调料名称） */
     function clearSlot() {
       if (editingPos === 0) {
-        /* 信息格恢复默认重量 */
-        config[0] = { name: '油', weight: 1000 };
+        /* 信息格重量归零 */
+        config[0] = { name: '油', weight: 0 };
+        document.getElementById('seasoningWeight').value = '0';
         renderGrid();
-        closeSelect();
-        showToast('油重量已重置为 1000g', 1500, 'success');
+        showToast('油重量已清零', 1500, 'success');
         return;
       }
-      delete config[editingPos];
+      if (config[editingPos] && config[editingPos].name) {
+        config[editingPos].weight = 0;
+      } else {
+        config[editingPos] = { name: '', weight: 0 };
+      }
+      document.getElementById('seasoningWeight').value = '0';
       renderGrid();
-      closeSelect();
-      showToast('位置 ' + editingPos + ' 已清空', 1500, 'success');
+      showToast('位置 ' + editingPos + ' 重量已清零', 1500, 'success');
+    }
+
+    /* 重置调料选择（清除下拉选中，清空重量输入） */
+    function resetSlot() {
+      var select = document.getElementById('seasoningSelect');
+      var weightInput = document.getElementById('seasoningWeight');
+      if (editingPos === 0) {
+        /* 信息格：重量恢复默认值 */
+        select.value = '油';
+        weightInput.value = '1000';
+        config[0] = { name: '油', weight: 1000 };
+        renderGrid();
+        showToast('油重量已恢复默认 1000g', 1500, 'success');
+        return;
+      }
+      select.value = '';
+      weightInput.value = '';
+      showToast('位置 ' + editingPos + ' 调料选择已清除', 1500, 'success');
     }
 
     /* 关闭选择 */