紫微斗数结果页分享功能样式优化

- 参考八字结果页的分享功能样式
- 分享按钮固定在页面底部
- 添加渐变背景和阴影效果
- 优化页面底部padding，避免内容被遮挡

src/main/java/xuan/controller/ShareController.java

@@ -0,0 +1,76 @@
+package xuan.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+import xuan.entity.ShareRecord;
+import xuan.repository.ShareRecordRepository;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/share")
+public class ShareController {
+    
+    @Autowired
+    private ShareRecordRepository shareRecordRepository;
+    
+    @PostMapping("/create")
+    public Map<String, Object> createShare(@RequestBody Map<String, Object> params) {
+        Map<String, Object> result = new HashMap<>();
+        
+        try {
+            String type = (String) params.get("type");
+            String resultData = (String) params.get("resultData");
+            String name = (String) params.get("name");
+            
+            ShareRecord shareRecord = new ShareRecord();
+            shareRecord.setShareId(UUID.randomUUID().toString().replace("-", "").substring(0, 16));
+            shareRecord.setType(type);
+            shareRecord.setResultData(resultData);
+            shareRecord.setName(name);
+            
+            shareRecordRepository.save(shareRecord);
+            
+            result.put("success", true);
+            result.put("shareId", shareRecord.getShareId());
+            result.put("message", "分享链接创建成功");
+        } catch (Exception e) {
+            result.put("success", false);
+            result.put("error", "创建分享链接失败：" + e.getMessage());
+        }
+        
+        return result;
+    }
+    
+    @GetMapping("/view/{shareId}")
+    public Map<String, Object> viewShare(@PathVariable String shareId) {
+        Map<String, Object> result = new HashMap<>();
+        
+        try {
+            ShareRecord shareRecord = shareRecordRepository.findByShareId(shareId)
+                .orElse(null);
+            
+            if (shareRecord == null) {
+                result.put("success", false);
+                result.put("error", "分享链接不存在或已过期");
+                return result;
+            }
+            
+            if (shareRecord.getExpireTime() != null && shareRecord.getExpireTime().before(new java.util.Date())) {
+                result.put("success", false);
+                result.put("error", "分享链接已过期");
+                return result;
+            }
+            
+            result.put("success", true);
+            result.put("data", shareRecord);
+        } catch (Exception e) {
+            result.put("success", false);
+            result.put("error", "获取分享数据失败：" + e.getMessage());
+        }
+        
+        return result;
+    }
+}