refactor: 删除 FilterModal 筛选弹窗组件

- 移除 FilterModal.js 文件
- 简化组件结构，筛选功能保留在 CardHeader 的 UnifiedSearchBox 中

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/views/Community/components/DynamicNewsCard/FilterModal.js

@@ -1,58 +0,0 @@
-// src/views/Community/components/DynamicNewsCard/FilterModal.js
-// 筛选弹窗组件
-
-import React from 'react';
-import {
-  Modal,
-  ModalOverlay,
-  ModalContent,
-  ModalHeader,
-  ModalBody,
-  ModalCloseButton,
-} from '@chakra-ui/react';
-import UnifiedSearchBox from '../UnifiedSearchBox';
-
-/**
- * 筛选弹窗组件
- * @param {boolean} isOpen - Modal 是否打开
- * @param {function} onClose - 关闭 Modal 回调
- * @param {object} filters - 当前筛选条件
- * @param {array} popularKeywords - 热门关键词
- * @param {function} onSearch - 搜索回调
- * @param {function} onSearchFocus - 搜索框聚焦回调
- * @param {string} mode - 当前模式 ('vertical' | 'four-row')
- * @param {number} pageSize - 每页大小 (10 | 30)
- */
-const FilterModal = ({
-  isOpen,
-  onClose,
-  filters,
-  popularKeywords,
-  onSearch,
-  onSearchFocus,
-  mode,
-  pageSize
-}) => {
-  return (
-    <Modal isOpen={isOpen} onClose={onClose} size="4xl" scrollBehavior="outside">
-      <ModalOverlay />
-      <ModalContent maxW="90vw">
-        <ModalHeader>筛选条件</ModalHeader>
-        <ModalCloseButton />
-        <ModalBody pb={6} overflow="visible">
-          {/* 直接复用 UnifiedSearchBox */}
-          <UnifiedSearchBox
-            filters={filters}
-            popularKeywords={popularKeywords}
-            onSearch={onSearch}
-            onSearchFocus={onSearchFocus}
-            mode={mode}
-            pageSize={pageSize}
-          />
-        </ModalBody>
-      </ModalContent>
-    </Modal>
-  );
-};
-
-export default FilterModal;