fix:优化了设置中下拉菜单的视觉表现

src/pages/SettingsPage.scss

@@ -221,6 +221,100 @@
     }
   }
 
+  .select-field {
+    position: relative;
+    margin-bottom: 10px;
+  }
+
+  .select-trigger {
+    width: 100%;
+    padding: 10px 16px;
+    border: 1px solid var(--border-color);
+    border-radius: 9999px;
+    font-size: 14px;
+    background: var(--bg-primary);
+    color: var(--text-primary);
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 8px;
+    cursor: pointer;
+    transition: all 0.2s;
+
+    &:hover {
+      border-color: var(--text-tertiary);
+    }
+
+    &.open {
+      border-color: var(--primary);
+      box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
+    }
+  }
+
+  .select-value {
+    flex: 1;
+    min-width: 0;
+    text-align: left;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
+  .select-dropdown {
+    position: absolute;
+    top: calc(100% + 6px);
+    left: 0;
+    right: 0;
+    background: color-mix(in srgb, var(--bg-primary) 85%, var(--bg-secondary));
+    border: 1px solid var(--border-color);
+    border-radius: 12px;
+    padding: 6px;
+    box-shadow: var(--shadow-md);
+    z-index: 20;
+    max-height: 320px;
+    overflow-y: auto;
+    backdrop-filter: blur(14px);
+    -webkit-backdrop-filter: blur(14px);
+  }
+
+  .select-option {
+    width: 100%;
+    text-align: left;
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    padding: 10px 12px;
+    border: none;
+    border-radius: 10px;
+    background: transparent;
+    cursor: pointer;
+    transition: all 0.15s;
+    color: var(--text-primary);
+    font-size: 14px;
+
+    &:hover {
+      background: var(--bg-tertiary);
+    }
+
+    &.active {
+      background: color-mix(in srgb, var(--primary) 12%, transparent);
+      color: var(--primary);
+    }
+  }
+
+  .option-label {
+    font-weight: 500;
+  }
+
+  .option-desc {
+    font-size: 12px;
+    color: var(--text-tertiary);
+  }
+
+  .select-option.active .option-desc {
+    color: var(--primary);
+  }
+
   .input-with-toggle {
     position: relative;
     display: flex;
@@ -1096,13 +1190,15 @@
   left: 0;
   right: 0;
   margin-top: 4px;
-  background: var(--bg-secondary);
+  background: color-mix(in srgb, var(--bg-primary) 85%, var(--bg-secondary));
   border: 1px solid var(--border-primary);
   border-radius: 8px;
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
   z-index: 100;
   max-height: 200px;
   overflow-y: auto;
+  backdrop-filter: blur(14px);
+  -webkit-backdrop-filter: blur(14px);
 }
 
 .wxid-option {

src/pages/SettingsPage.tsx

@@ -41,6 +41,12 @@ function SettingsPage() {
   const [wxidOptions, setWxidOptions] = useState<WxidOption[]>([])
   const [showWxidSelect, setShowWxidSelect] = useState(false)
   const wxidDropdownRef = useRef<HTMLDivElement>(null)
+  const [showExportFormatSelect, setShowExportFormatSelect] = useState(false)
+  const [showExportDateRangeSelect, setShowExportDateRangeSelect] = useState(false)
+  const [showExportExcelColumnsSelect, setShowExportExcelColumnsSelect] = useState(false)
+  const exportFormatDropdownRef = useRef<HTMLDivElement>(null)
+  const exportDateRangeDropdownRef = useRef<HTMLDivElement>(null)
+  const exportExcelColumnsDropdownRef = useRef<HTMLDivElement>(null)
   const [cachePath, setCachePath] = useState('')
   const [logEnabled, setLogEnabled] = useState(false)
   const [whisperModelName, setWhisperModelName] = useState('base')
@@ -85,13 +91,23 @@ function SettingsPage() {
   // 点击外部关闭下拉框
   useEffect(() => {
     const handleClickOutside = (e: MouseEvent) => {
-      if (showWxidSelect && wxidDropdownRef.current && !wxidDropdownRef.current.contains(e.target as Node)) {
+      const target = e.target as Node
+      if (showWxidSelect && wxidDropdownRef.current && !wxidDropdownRef.current.contains(target)) {
         setShowWxidSelect(false)
       }
+      if (showExportFormatSelect && exportFormatDropdownRef.current && !exportFormatDropdownRef.current.contains(target)) {
+        setShowExportFormatSelect(false)
+      }
+      if (showExportDateRangeSelect && exportDateRangeDropdownRef.current && !exportDateRangeDropdownRef.current.contains(target)) {
+        setShowExportDateRangeSelect(false)
+      }
+      if (showExportExcelColumnsSelect && exportExcelColumnsDropdownRef.current && !exportExcelColumnsDropdownRef.current.contains(target)) {
+        setShowExportExcelColumnsSelect(false)
+      }
     }
     document.addEventListener('mousedown', handleClickOutside)
     return () => document.removeEventListener('mousedown', handleClickOutside)
-  }, [showWxidSelect])
+  }, [showWxidSelect, showExportFormatSelect, showExportDateRangeSelect, showExportExcelColumnsSelect])
 
   useEffect(() => {
     const removeDb = window.electronAPI.key.onDbKeyStatus((payload) => {
@@ -863,48 +879,114 @@ function SettingsPage() {
     </div>
   )
 
-  const renderExportTab = () => (
+  const exportFormatOptions = [
+    { value: 'excel', label: 'Excel', desc: '电子表格，适合统计分析' },
+    { value: 'chatlab', label: 'ChatLab', desc: '标准格式，支持其他软件导入' },
+    { value: 'chatlab-jsonl', label: 'ChatLab JSONL', desc: '流式格式，适合大量消息' },
+    { value: 'json', label: 'JSON', desc: '详细格式，包含完整消息信息' },
+    { value: 'html', label: 'HTML', desc: '网页格式，可直接浏览' },
+    { value: 'txt', label: 'TXT', desc: '纯文本，通用格式' },
+    { value: 'sql', label: 'PostgreSQL', desc: '数据库脚本，便于导入到数据库' }
+  ]
+  const exportDateRangeOptions = [
+    { value: 'today', label: '今天' },
+    { value: '7d', label: '最近7天' },
+    { value: '30d', label: '最近30天' },
+    { value: '90d', label: '最近90天' },
+    { value: 'all', label: '全部时间' }
+  ]
+  const exportExcelColumnOptions = [
+    { value: 'compact', label: '精简列', desc: '序号、时间、发送者身份、消息类型、内容' },
+    { value: 'full', label: '完整列', desc: '含发送者昵称/微信ID/备注' }
+  ]
+
+  const getOptionLabel = (options: { value: string; label: string }[], value: string) => {
+    return options.find((option) => option.value === value)?.label ?? value
+  }
+
+  const renderExportTab = () => {
+    const exportExcelColumnsValue = exportDefaultExcelCompactColumns ? 'compact' : 'full'
+    const exportFormatLabel = getOptionLabel(exportFormatOptions, exportDefaultFormat)
+    const exportDateRangeLabel = getOptionLabel(exportDateRangeOptions, exportDefaultDateRange)
+    const exportExcelColumnsLabel = getOptionLabel(exportExcelColumnOptions, exportExcelColumnsValue)
+
+    return (
     <div className="tab-content">
       <div className="form-group">
         <label>默认导出格式</label>
         <span className="form-hint">导出页面默认选中的格式</span>
-        <select
-          value={exportDefaultFormat}
-          onChange={async (e) => {
-            const value = e.target.value
-            setExportDefaultFormat(value)
-            await configService.setExportDefaultFormat(value)
-            showMessage('已更新导出格式默认值', true)
+        <div className="select-field" ref={exportFormatDropdownRef}>
+          <button
+            type="button"
+            className={`select-trigger ${showExportFormatSelect ? 'open' : ''}`}
+            onClick={() => {
+              setShowExportFormatSelect(!showExportFormatSelect)
+              setShowExportDateRangeSelect(false)
+              setShowExportExcelColumnsSelect(false)
             }}
           >
-          <option value="excel">Excel</option>
-          <option value="chatlab">ChatLab</option>
-          <option value="chatlab-jsonl">ChatLab JSONL</option>
-          <option value="json">JSON</option>
-          <option value="html">HTML</option>
-          <option value="txt">TXT</option>
-          <option value="sql">PostgreSQL</option>
-        </select>
+            <span className="select-value">{exportFormatLabel}</span>
+            <ChevronDown size={16} />
+          </button>
+          {showExportFormatSelect && (
+            <div className="select-dropdown">
+              {exportFormatOptions.map((option) => (
+                <button
+                  key={option.value}
+                  type="button"
+                  className={`select-option ${exportDefaultFormat === option.value ? 'active' : ''}`}
+                  onClick={async () => {
+                    setExportDefaultFormat(option.value)
+                    await configService.setExportDefaultFormat(option.value)
+                    showMessage('已更新导出格式默认值', true)
+                    setShowExportFormatSelect(false)
+                  }}
+                >
+                  <span className="option-label">{option.label}</span>
+                  {option.desc && <span className="option-desc">{option.desc}</span>}
+                </button>
+              ))}
+            </div>
+          )}
+        </div>
       </div>
 
       <div className="form-group">
         <label>默认导出时间范围</label>
         <span className="form-hint">控制导出页面的默认时间选择</span>
-        <select
-          value={exportDefaultDateRange}
-          onChange={async (e) => {
-            const value = e.target.value
-            setExportDefaultDateRange(value)
-            await configService.setExportDefaultDateRange(value)
-            showMessage('已更新默认导出时间范围', true)
+        <div className="select-field" ref={exportDateRangeDropdownRef}>
+          <button
+            type="button"
+            className={`select-trigger ${showExportDateRangeSelect ? 'open' : ''}`}
+            onClick={() => {
+              setShowExportDateRangeSelect(!showExportDateRangeSelect)
+              setShowExportFormatSelect(false)
+              setShowExportExcelColumnsSelect(false)
             }}
           >
-          <option value="today">今天</option>
-          <option value="7d">最近7天</option>
-          <option value="30d">最近30天</option>
-          <option value="90d">最近90天</option>
-          <option value="all">全部时间</option>
-        </select>
+            <span className="select-value">{exportDateRangeLabel}</span>
+            <ChevronDown size={16} />
+          </button>
+          {showExportDateRangeSelect && (
+            <div className="select-dropdown">
+              {exportDateRangeOptions.map((option) => (
+                <button
+                  key={option.value}
+                  type="button"
+                  className={`select-option ${exportDefaultDateRange === option.value ? 'active' : ''}`}
+                  onClick={async () => {
+                    setExportDefaultDateRange(option.value)
+                    await configService.setExportDefaultDateRange(option.value)
+                    showMessage('已更新默认导出时间范围', true)
+                    setShowExportDateRangeSelect(false)
+                  }}
+                >
+                  <span className="option-label">{option.label}</span>
+                </button>
+              ))}
+            </div>
+          )}
+        </div>
       </div>
 
       <div className="form-group">
@@ -956,21 +1038,45 @@ function SettingsPage() {
       <div className="form-group">
         <label>Excel 列显示</label>
         <span className="form-hint">控制 Excel 导出的列字段</span>
-        <select
-          value={exportDefaultExcelCompactColumns ? 'compact' : 'full'}
-          onChange={async (e) => {
-            const compact = e.target.value === 'compact'
+        <div className="select-field" ref={exportExcelColumnsDropdownRef}>
+          <button
+            type="button"
+            className={`select-trigger ${showExportExcelColumnsSelect ? 'open' : ''}`}
+            onClick={() => {
+              setShowExportExcelColumnsSelect(!showExportExcelColumnsSelect)
+              setShowExportFormatSelect(false)
+              setShowExportDateRangeSelect(false)
+            }}
+          >
+            <span className="select-value">{exportExcelColumnsLabel}</span>
+            <ChevronDown size={16} />
+          </button>
+          {showExportExcelColumnsSelect && (
+            <div className="select-dropdown">
+              {exportExcelColumnOptions.map((option) => (
+                <button
+                  key={option.value}
+                  type="button"
+                  className={`select-option ${exportExcelColumnsValue === option.value ? 'active' : ''}`}
+                  onClick={async () => {
+                    const compact = option.value === 'compact'
                     setExportDefaultExcelCompactColumns(compact)
                     await configService.setExportDefaultExcelCompactColumns(compact)
                     showMessage(compact ? '已启用精简列' : '已启用完整列', true)
+                    setShowExportExcelColumnsSelect(false)
                   }}
                 >
-          <option value="compact">精简列（序号、时间、发送者身份、消息类型、内容）</option>
-          <option value="full">完整列（含发送者昵称/微信ID/备注）</option>
-        </select>
+                  <span className="option-label">{option.label}</span>
+                  {option.desc && <span className="option-desc">{option.desc}</span>}
+                </button>
+              ))}
+            </div>
+          )}
+        </div>
       </div>
     </div>
     )
+  }
   const renderCacheTab = () => (
     <div className="tab-content">
       <p className="section-desc">管理应用缓存数据</p>