refactor(config): 移除BrowserConfig配置类并引入PlaywrightManager单例管理器

将原先通过Spring管理的Playwright实例改为使用自定义的单例模式进行全局管理，
提升资源控制能力与生命周期管理的灵活性。同时在应用关闭时主动释放Playwright资源，避免内存泄漏。- 删除`BrowserConfig`类，不再通过Spring容器管理Playwright实例
- 新增`PlaywrightManager`单例类，统一管理Playwright的创建、获取和销毁- 在`DesktopApplication`中添加对Playwright实例的关闭调用
- 更新`FtbCrawlNetDy`和`FtbCrawlNetMt`服务类中的Playwright实例获取方式

src/main/java/com/fantaibao/config/PlaywrightManager.java

@@ -0,0 +1,70 @@
+package com.fantaibao.config;
+
+import com.microsoft.playwright.Playwright;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * Playwright单例管理类
+ * 用于全局管理和提供Playwright实例
+ */
+@Slf4j
+public class PlaywrightManager {
+    
+    private static volatile PlaywrightManager instance;
+    private Playwright playwright;
+    
+    private PlaywrightManager() {
+        if (instance != null) {
+            throw new RuntimeException("请使用getInstance()方法获取实例");
+        }
+        try {
+            this.playwright = Playwright.create();
+        } catch (Exception e) {
+            log.error("创建Playwright实例失败", e);
+            throw new RuntimeException("创建Playwright实例失败", e);
+        }
+    }
+    
+    /**
+     * 获取PlaywrightManager单例实例
+     * @return PlaywrightManager实例
+     */
+    public static PlaywrightManager getInstance() {
+        if (instance == null) {
+            synchronized (PlaywrightManager.class) {
+                if (instance == null) {
+                    instance = new PlaywrightManager();
+                }
+            }
+        }
+        return instance;
+    }
+    
+    /**
+     * 获取Playwright实例
+     * @return Playwright实例
+     */
+    public Playwright getPlaywright() {
+        if (playwright == null) {
+            throw new RuntimeException("Playwright实例未初始化或已被销毁");
+        }
+        return playwright;
+    }
+    
+    /**
+     * 关闭Playwright实例并释放资源
+     */
+    public void close() {
+        if (playwright != null) {
+            try {
+                playwright.close();
+            } catch (Exception e) {
+                log.error("关闭Playwright实例时出错", e);
+            } finally {
+                playwright = null;
+                instance = null;
+            }
+        }
+    }
+
+}