feat: add community content and address APIs

backend/src/main/java/com/linhelp/community/CommunityService.java

@@ -0,0 +1,32 @@
+package com.linhelp.community;
+
+import org.springframework.stereotype.Service;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+@Service
+public class CommunityService {
+
+    public CommunityResponse currentCommunity() {
+        CommunityResponse response = new CommunityResponse();
+        response.setId(1L);
+        response.setTenantId(1L);
+        response.setName("邻小帮示范小区");
+        response.setAddress("示范路 1 号");
+        response.setContactName("社区管理员");
+        response.setContactPhone("13800000000");
+        response.setModules(defaultModules());
+        return response;
+    }
+
+    private Map<String, Boolean> defaultModules() {
+        Map<String, Boolean> modules = new LinkedHashMap<String, Boolean>();
+        modules.put("GOODS", true);
+        modules.put("EXPRESS", true);
+        modules.put("GROUP_BUY", true);
+        modules.put("SECOND_HAND", true);
+        modules.put("NOTICE", true);
+        return modules;
+    }
+}