feat(components): 添加搜索弹窗组件并优化弹窗插件

添加了新的 search-popup 组件，包含完整的搜索和筛选功能，
支持扫码、输入搜索、自定义插槽等特性。同时优化了 popup-plugin
组件的代码结构，移除了调试日志并改进了模板格式。

miniprogram/pages/components/search-popup/search-popup.wxml

@@ -0,0 +1,61 @@
+<view style="display: flex;align-items: center;margin-bottom: 12px;{{customStyle}}">
+	<view style="flex: 1;margin-right: {{hideMore ? 0 : '12px'}};">
+		<block wx:if="{{useInputSlot}}">
+			<slot name='input' />
+		</block>
+		<block wx:else>
+			<t-input
+			 wx:if="{{!hideInput}}"
+			 placeholder="{{placeholder || '请输入关键字'}}"
+			 clearable
+			 borderless
+			 bindchange="change"
+			 value="{{value || ''}}"
+			 data-key="{{dataKey}}"
+			 confirm-type="search"
+			 bind:clear="clear"
+			 custom-style="background:#f5f5f5;min-height: 34px;height:34px;padding: 0;"
+			 size="small"
+			>
+				<t-button
+				 name="search"
+				 slot="prefix-icon"
+				 size="small"
+				 theme="primary"
+				 bindtap="scanCode"
+				 icon="scan"
+				/>
+				<t-button
+				 slot="suffix-icon"
+				 bindtap="search"
+				 icon="search"
+				 theme="primary"
+				 size="small"
+				/>
+			</t-input>
+		</block>
+	</view>
+	<t-button
+	 wx:if="{{!hideMore}}"
+	 bindtap="showSearch"
+	 theme="primary"
+	 size="small"
+	>
+		筛选
+	</t-button>
+</view>
+
+<popup-plugin visible="{{ show }}" bind:close="close" title="筛选条件">
+	<slot name='content' />
+	<slot wx:if="{{useFooterSlot}}" name="footer" />
+	<view wx:else style="padding: 12px 0;display: flex;justify-content: center;position: sticky;bottom: 0;left: 0;background-color: #fff;z-index: 1;">
+		<t-button
+		 bindtap="ok"
+		 style="min-width: 80px;"
+		 size="small"
+		 theme="primary"
+		>搜索
+		</t-button>
+	</view>
+</popup-plugin>
+