feat: 添加行业分类Cascader组件

- 新增 IndustryCascader 组件，支持多级行业分类选择
- 集成 IndustryContext 全局行业数据管理
- 支持懒加载和搜索功能
- 提供清晰的行业选择路径展示

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

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

src/views/Community/components/IndustryCascader.js

@@ -0,0 +1,75 @@
+// src/views/Community/components/IndustryCascader.js
+import React, { useState } from 'react';
+import { Card, Form, Cascader } from 'antd';
+import { useIndustry } from '../../../contexts/IndustryContext';
+import { logger } from '../../../utils/logger';
+
+const IndustryCascader = ({ onFilterChange, loading }) => {
+    const [industryCascaderValue, setIndustryCascaderValue] = useState([]);
+
+    // 使用全局行业数据
+    const { industryData, loadIndustryData, loading: industryLoading } = useIndustry();
+
+    // Cascader 获得焦点时加载数据
+    const handleCascaderFocus = async () => {
+        if (!industryData || industryData.length === 0) {
+            logger.debug('IndustryCascader', 'Cascader 获得焦点，开始加载行业数据');
+            await loadIndustryData();
+        }
+    };
+
+    // Cascader 选择变化
+    const handleIndustryCascaderChange = (value, selectedOptions) => {
+        setIndustryCascaderValue(value);
+
+        if (value && value.length > 0) {
+            // value[0] = 分类体系名称
+            // value[1...n] = 行业代码（一级~四级）
+            const industryCode = value[value.length - 1]; // 最后一级的 code
+            const classification = value[0]; // 分类体系名称
+
+            onFilterChange('industry_classification', classification);
+            onFilterChange('industry_code', industryCode);
+
+            logger.debug('IndustryCascader', 'Cascader 选择变化', {
+                value,
+                classification,
+                industryCode,
+                path: selectedOptions.map(o => o.label).join(' > ')
+            });
+        } else {
+            // 清空
+            onFilterChange('industry_classification', '');
+            onFilterChange('industry_code', '');
+        }
+    };
+
+    return (
+        <Card className="industry-cascader" title="行业分类" style={{ marginBottom: 16 }}>
+            <Form layout="vertical">
+                <Form.Item label="选择行业分类体系和具体行业">
+                    <Cascader
+                        options={industryData || []}
+                        value={industryCascaderValue}
+                        onChange={handleIndustryCascaderChange}
+                        onFocus={handleCascaderFocus}
+                        changeOnSelect
+                        placeholder={industryLoading ? "加载中..." : "请选择行业分类体系和具体行业"}
+                        disabled={loading || industryLoading}
+                        loading={industryLoading}
+                        allowClear
+                        expandTrigger="hover"
+                        displayRender={(labels) => labels.join(' > ')}
+                        showSearch={{
+                            filter: (inputValue, path) =>
+                                path.some(option => option.label.toLowerCase().includes(inputValue.toLowerCase()))
+                        }}
+                        style={{ width: '100%' }}
+                    />
+                </Form.Item>
+            </Form>
+        </Card>
+    );
+};
+
+export default IndustryCascader;