diff --git a/build.gradle b/build.gradle
index 75b2260..7717599 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '4.0.4'
+    id 'org.springframework.boot' version '3.2.5'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
@@ -25,22 +25,26 @@ repositories {
 }
 
 dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
-    implementation 'org.springframework.boot:spring-boot-starter-liquibase'
     implementation 'org.springframework.boot:spring-boot-starter-security'
-    implementation 'org.springframework.boot:spring-boot-starter-session-data-redis'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
-    implementation 'org.springframework.boot:spring-boot-starter-webmvc'
+    implementation 'org.springframework.boot:spring-boot-starter-data-redis'
+    implementation 'org.liquibase:liquibase-core'
+    implementation 'org.springframework.boot:spring-boot-starter-websocket'
+    implementation 'org.mapstruct:mapstruct:1.5.5.Final'
+
+    implementation 'io.jsonwebtoken:jjwt-api:0.11.5'
+    runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.5'
+    runtimeOnly 'io.jsonwebtoken:jjwt-jackson:0.11.5'
+
     compileOnly 'org.projectlombok:lombok'
-    runtimeOnly 'org.postgresql:postgresql'
     annotationProcessor 'org.projectlombok:lombok'
-    testImplementation 'org.springframework.boot:spring-boot-starter-data-jpa-test'
-    testImplementation 'org.springframework.boot:spring-boot-starter-liquibase-test'
-    testImplementation 'org.springframework.boot:spring-boot-starter-security-test'
-    testImplementation 'org.springframework.boot:spring-boot-starter-session-data-redis-test'
-    testImplementation 'org.springframework.boot:spring-boot-starter-validation-test'
-    testImplementation 'org.springframework.boot:spring-boot-starter-webmvc-test'
-    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+    annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.5.Final'
+
+    runtimeOnly 'org.postgresql:postgresql'
+
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 
 tasks.named('test') {
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 9e4a3f5..fb3cfb1 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1 +1,16 @@
-services:
\ No newline at end of file
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:15
+    environment:
+      POSTGRES_DB: nahodka
+      POSTGRES_USER: user
+      POSTGRES_PASSWORD: pass
+    ports:
+      - "5432:5432"
+
+  redis:
+    image: redis:7
+    ports:
+      - "6379:6379"
\ No newline at end of file
diff --git a/src/main/java/com/krylov/refound/config/CacheConfig.java b/src/main/java/com/krylov/refound/config/CacheConfig.java
new file mode 100644
index 0000000..f250372
--- /dev/null
+++ b/src/main/java/com/krylov/refound/config/CacheConfig.java
@@ -0,0 +1,10 @@
+package com.krylov.refound.config;
+
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Configuration;
+
+@EnableCaching
+@Configuration
+public class CacheConfig {
+
+}
diff --git a/src/main/java/com/krylov/refound/config/RedisConfig.java b/src/main/java/com/krylov/refound/config/RedisConfig.java
new file mode 100644
index 0000000..7600024
--- /dev/null
+++ b/src/main/java/com/krylov/refound/config/RedisConfig.java
@@ -0,0 +1,27 @@
+package com.krylov.refound.config;
+
+import java.time.Duration;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.cache.RedisCacheConfiguration;
+import org.springframework.data.redis.cache.RedisCacheManager;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+
+@Configuration
+public class RedisConfig {
+  @Value("${cache.ttl}")
+  private long ttl;
+
+  @Bean
+  public RedisCacheManager cacheManager(RedisConnectionFactory factory) {
+
+    RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
+        .entryTtl(Duration.ofSeconds(ttl))
+        .disableCachingNullValues();
+
+    return RedisCacheManager.builder(factory)
+        .cacheDefaults(config)
+        .build();
+  }
+}
diff --git a/src/main/java/com/krylov/refound/config/SecurityConfig.java b/src/main/java/com/krylov/refound/config/SecurityConfig.java
index 5b87ea3..b2e4edd 100644
--- a/src/main/java/com/krylov/refound/config/SecurityConfig.java
+++ b/src/main/java/com/krylov/refound/config/SecurityConfig.java
@@ -1,4 +1,39 @@
 package com.krylov.refound.config;
 
+import com.krylov.refound.service.security.JwtFilter;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+
+@Configuration
+@EnableWebSecurity
+@RequiredArgsConstructor
 public class SecurityConfig {
+  private final JwtFilter jwtFilter;
+
+  @Bean
+  public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+
+    http
+        .csrf(AbstractHttpConfigurer::disable)
+        .authorizeHttpRequests(auth -> auth
+            .requestMatchers("/api/auth/**").permitAll()
+            .anyRequest().authenticated()
+        )
+        .addFilterBefore(jwtFilter, UsernamePasswordAuthenticationFilter.class);
+
+    return http.build();
+  }
+
+  @Bean
+  public PasswordEncoder passwordEncoder() {
+    return new BCryptPasswordEncoder();
+  }
 }
diff --git a/src/main/java/com/krylov/refound/config/WebConfig.java b/src/main/java/com/krylov/refound/config/WebConfig.java
new file mode 100644
index 0000000..079ecc1
--- /dev/null
+++ b/src/main/java/com/krylov/refound/config/WebConfig.java
@@ -0,0 +1,19 @@
+package com.krylov.refound.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+  @Value("${file.upload-dir}")
+  private String uploadDir;
+
+  @Override
+  public void addResourceHandlers(ResourceHandlerRegistry registry) {
+    registry
+        .addResourceHandler("/files/**")
+        .addResourceLocations("file:" + uploadDir);
+  }
+}
diff --git a/src/main/java/com/krylov/refound/config/WebSocketConfig.java b/src/main/java/com/krylov/refound/config/WebSocketConfig.java
new file mode 100644
index 0000000..295c945
--- /dev/null
+++ b/src/main/java/com/krylov/refound/config/WebSocketConfig.java
@@ -0,0 +1,27 @@
+package com.krylov.refound.config;
+
+import com.krylov.refound.util.JwtHandshakeInterceptor;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
+import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
+import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
+
+@Configuration
+@EnableWebSocketMessageBroker
+public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
+
+  @Override
+  public void configureMessageBroker(MessageBrokerRegistry config) {
+    config.enableSimpleBroker("/topic");
+    config.setApplicationDestinationPrefixes("/app");
+  }
+
+  @Override
+  public void registerStompEndpoints(StompEndpointRegistry registry) {
+    registry.addEndpoint("/ws")
+        .setAllowedOriginPatterns("*")
+        .addInterceptors(new JwtHandshakeInterceptor()) // 🔥 JWT
+        .withSockJS();
+  }
+}
diff --git a/src/main/java/com/krylov/refound/controller/AuthController.java b/src/main/java/com/krylov/refound/controller/AuthController.java
index ad207fd..aff50d0 100644
--- a/src/main/java/com/krylov/refound/controller/AuthController.java
+++ b/src/main/java/com/krylov/refound/controller/AuthController.java
@@ -1,4 +1,27 @@
 package com.krylov.refound.controller;
 
+import com.krylov.refound.dto.AuthRequest;
+import com.krylov.refound.dto.AuthResponse;
+import com.krylov.refound.service.security.AuthService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/auth")
+@RequiredArgsConstructor
 public class AuthController {
+  private final AuthService service;
+
+  @PostMapping("/register")
+  public AuthResponse register(@RequestBody AuthRequest request) {
+    return service.register(request);
+  }
+
+  @PostMapping("/login")
+  public AuthResponse login(@RequestBody AuthRequest request) {
+    return service.login(request);
+  }
 }
diff --git a/src/main/java/com/krylov/refound/controller/ChatController.java b/src/main/java/com/krylov/refound/controller/ChatController.java
new file mode 100644
index 0000000..d4dc79f
--- /dev/null
+++ b/src/main/java/com/krylov/refound/controller/ChatController.java
@@ -0,0 +1,37 @@
+package com.krylov.refound.controller;
+
+import com.krylov.refound.dto.ChatMessage;
+import com.krylov.refound.entity.Message;
+import com.krylov.refound.entity.User;
+import com.krylov.refound.repository.UserRepository;
+import com.krylov.refound.service.MessageService;
+import java.security.Principal;
+import java.util.Optional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.handler.annotation.Payload;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
+import org.springframework.stereotype.Controller;
+
+@Controller
+@RequiredArgsConstructor
+public class ChatController {
+  private final MessageService service;
+  private final SimpMessagingTemplate messagingTemplate;
+  private final UserRepository userRepository;
+
+
+  @MessageMapping("/chat")
+  public void send(@Payload ChatMessage message, Principal principal) {
+
+    Optional<User> sender = userRepository.findByEmail(principal.getName());
+    Message saved = new Message();
+    if(sender.isPresent()){
+      saved = service.send(message.getReceiverId(), message.getContent());
+    }
+
+    // отправка получателю
+    messagingTemplate.convertAndSend("/topic/messages/" + message.getReceiverId(), saved);
+  }
+
+}
diff --git a/src/main/java/com/krylov/refound/controller/FavoriteController.java b/src/main/java/com/krylov/refound/controller/FavoriteController.java
new file mode 100644
index 0000000..abf04a5
--- /dev/null
+++ b/src/main/java/com/krylov/refound/controller/FavoriteController.java
@@ -0,0 +1,34 @@
+package com.krylov.refound.controller;
+
+import com.krylov.refound.dto.PostResponse;
+import com.krylov.refound.mapper.PostMapper;
+import com.krylov.refound.service.FavoriteService;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1/favorites")
+@RequiredArgsConstructor
+public class FavoriteController {
+
+  private final FavoriteService service;
+  private final PostMapper mapper;
+
+  @PostMapping("/{postId}/toggle")
+  public void toggle(@PathVariable Long postId) {
+    service.toggle(postId);
+  }
+
+  @GetMapping
+  public List<PostResponse> getAll() {
+    return service.getFavorites()
+        .stream()
+        .map(mapper::toResponse)
+        .toList();
+  }
+}
diff --git a/src/main/java/com/krylov/refound/controller/FileController.java b/src/main/java/com/krylov/refound/controller/FileController.java
new file mode 100644
index 0000000..ef0a7f8
--- /dev/null
+++ b/src/main/java/com/krylov/refound/controller/FileController.java
@@ -0,0 +1,21 @@
+package com.krylov.refound.controller;
+
+import com.krylov.refound.service.FileStorageService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+@RequestMapping("/api/v1/files")
+@RequiredArgsConstructor
+public class FileController {
+  private final FileStorageService storageService;
+
+  @PostMapping
+  public String upload(@RequestParam("file") MultipartFile file) {
+    return storageService.save(file);
+  }
+}
diff --git a/src/main/java/com/krylov/refound/controller/MessageController.java b/src/main/java/com/krylov/refound/controller/MessageController.java
new file mode 100644
index 0000000..31f8bc1
--- /dev/null
+++ b/src/main/java/com/krylov/refound/controller/MessageController.java
@@ -0,0 +1,41 @@
+package com.krylov.refound.controller;
+
+import com.krylov.refound.dto.DialogResponse;
+import com.krylov.refound.entity.Message;
+import com.krylov.refound.service.MessageService;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1/messages")
+@RequiredArgsConstructor
+public class MessageController {
+  private final MessageService service;
+
+  @PostMapping
+  public void send(@RequestParam Long receiverId,
+      @RequestParam String content) {
+    service.send(receiverId, content);
+  }
+
+  @GetMapping("/{userId}")
+  public List<Message> chat(@PathVariable Long userId) {
+    return service.getChat(userId);
+  }
+
+  @GetMapping("/dialogs")
+  public List<DialogResponse> getDialogs() {
+    return service.getDialogs();
+  }
+
+  @PostMapping("/read/{userId}")
+  public void markAsRead(@PathVariable Long userId) {
+    service.markAsRead(userId);
+  }
+}
diff --git a/src/main/java/com/krylov/refound/controller/PostController.java b/src/main/java/com/krylov/refound/controller/PostController.java
index 548d09d..c842b4d 100644
--- a/src/main/java/com/krylov/refound/controller/PostController.java
+++ b/src/main/java/com/krylov/refound/controller/PostController.java
@@ -1,4 +1,50 @@
 package com.krylov.refound.controller;
 
+import com.krylov.refound.dto.PostFilter;
+import com.krylov.refound.dto.PostRequest;
+import com.krylov.refound.dto.PostResponse;
+import com.krylov.refound.repository.PostRepository;
+import com.krylov.refound.service.PostService;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+@RequestMapping("/api/v1/posts")
+@RequiredArgsConstructor
 public class PostController {
+
+  private final PostService service;
+
+  @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+  public PostResponse create(@RequestPart("data") PostRequest request, @RequestPart(value = "files", required = false) List<MultipartFile> files) {
+    return service.create(request, files);
+  }
+
+  @GetMapping
+  public Page<PostResponse> getFeed(PostFilter filter, Pageable pageable) {
+    return service.getFeed(filter, pageable);
+  }
+
+  @PutMapping("/{id}")
+  public PostResponse update(@PathVariable Long id, @RequestBody PostRequest request) {
+    return service.update(id, request);
+  }
+
+  @DeleteMapping("/{id}")
+  public void delete(@PathVariable Long id) {
+    service.delete(id);
+  }
 }
diff --git a/src/main/java/com/krylov/refound/dto/AuthRequest.java b/src/main/java/com/krylov/refound/dto/AuthRequest.java
index 028f761..c2cc5db 100644
--- a/src/main/java/com/krylov/refound/dto/AuthRequest.java
+++ b/src/main/java/com/krylov/refound/dto/AuthRequest.java
@@ -1,4 +1,9 @@
 package com.krylov.refound.dto;
 
+import lombok.Data;
+
+@Data
 public class AuthRequest {
+  private String email;
+  private String password;
 }
diff --git a/src/main/java/com/krylov/refound/dto/AuthResponse.java b/src/main/java/com/krylov/refound/dto/AuthResponse.java
index 27ab150..227e6ba 100644
--- a/src/main/java/com/krylov/refound/dto/AuthResponse.java
+++ b/src/main/java/com/krylov/refound/dto/AuthResponse.java
@@ -1,4 +1,11 @@
 package com.krylov.refound.dto;
 
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
 public class AuthResponse {
+
+  private String token;
 }
diff --git a/src/main/java/com/krylov/refound/dto/ChatMessage.java b/src/main/java/com/krylov/refound/dto/ChatMessage.java
new file mode 100644
index 0000000..2c52ea3
--- /dev/null
+++ b/src/main/java/com/krylov/refound/dto/ChatMessage.java
@@ -0,0 +1,9 @@
+package com.krylov.refound.dto;
+
+import lombok.Data;
+
+@Data
+public class ChatMessage {
+  private Long receiverId;
+  private String content;
+}
diff --git a/src/main/java/com/krylov/refound/dto/DialogResponse.java b/src/main/java/com/krylov/refound/dto/DialogResponse.java
new file mode 100644
index 0000000..0215a26
--- /dev/null
+++ b/src/main/java/com/krylov/refound/dto/DialogResponse.java
@@ -0,0 +1,15 @@
+package com.krylov.refound.dto;
+
+import java.time.LocalDateTime;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class DialogResponse {
+  private Long userId;
+  private String userEmail;
+  private String lastMessage;
+  private LocalDateTime lastMessageTime;
+  private Long unreadCount;
+}
diff --git a/src/main/java/com/krylov/refound/dto/PostFilter.java b/src/main/java/com/krylov/refound/dto/PostFilter.java
new file mode 100644
index 0000000..3345ab2
--- /dev/null
+++ b/src/main/java/com/krylov/refound/dto/PostFilter.java
@@ -0,0 +1,29 @@
+package com.krylov.refound.dto;
+
+import com.krylov.refound.enums.PostType;
+import lombok.Data;
+
+@Data
+public class PostFilter {
+
+  private PostType type;
+  private String city;
+  private String category;
+  private String district;
+  private String search;
+  private Double lat;
+  private Double lng;
+  private Double radius; // в км
+
+  @Override
+  public String toString() {
+    return "type=" + type +
+        ",city=" + city +
+        ",category=" + category +
+        ",district=" + district +
+        ",search=" + search +
+        ",lat=" + lat +
+        ",lng=" + lng +
+        ",radius=" + radius;
+  }
+}
diff --git a/src/main/java/com/krylov/refound/dto/PostRequest.java b/src/main/java/com/krylov/refound/dto/PostRequest.java
index 765fb88..055dc1d 100644
--- a/src/main/java/com/krylov/refound/dto/PostRequest.java
+++ b/src/main/java/com/krylov/refound/dto/PostRequest.java
@@ -1,4 +1,25 @@
 package com.krylov.refound.dto;
 
+import com.krylov.refound.enums.PostType;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+@Data
 public class PostRequest {
+
+  @NotNull
+  private PostType type;
+
+  @NotBlank
+  private String title;
+
+  private String description;
+
+  private String category;
+
+  @NotBlank
+  private String city;
+
+  private String district;
 }
diff --git a/src/main/java/com/krylov/refound/dto/PostResponse.java b/src/main/java/com/krylov/refound/dto/PostResponse.java
index 173e352..3dc7e6a 100644
--- a/src/main/java/com/krylov/refound/dto/PostResponse.java
+++ b/src/main/java/com/krylov/refound/dto/PostResponse.java
@@ -1,4 +1,22 @@
 package com.krylov.refound.dto;
 
+import com.krylov.refound.enums.PostStatus;
+import com.krylov.refound.enums.PostType;
+import java.time.LocalDateTime;
+import lombok.Data;
+
+@Data
 public class PostResponse {
+
+  private Long id;
+  private String title;
+  private String description;
+  private String category;
+  private String city;
+  private String district;
+  private PostType type;
+  private PostStatus status;
+  private LocalDateTime createdAt;
+  private String userEmail;
+  private boolean isFavorite;
 }
diff --git a/src/main/java/com/krylov/refound/entity/Favorite.java b/src/main/java/com/krylov/refound/entity/Favorite.java
new file mode 100644
index 0000000..8a000ed
--- /dev/null
+++ b/src/main/java/com/krylov/refound/entity/Favorite.java
@@ -0,0 +1,27 @@
+package com.krylov.refound.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "favorites", uniqueConstraints = @UniqueConstraint(columnNames = {"user_id", "post_id"}))
+@Getter
+@Setter
+public class Favorite {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @ManyToOne
+  private User user;
+
+  @ManyToOne
+  private Post post;
+}
diff --git a/src/main/java/com/krylov/refound/entity/Image.java b/src/main/java/com/krylov/refound/entity/Image.java
index 27afb91..7da2c07 100644
--- a/src/main/java/com/krylov/refound/entity/Image.java
+++ b/src/main/java/com/krylov/refound/entity/Image.java
@@ -1,4 +1,25 @@
 package com.krylov.refound.entity;
 
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "images")
+@Getter
+@Setter
 public class Image {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  private String url;
+
+  @ManyToOne
+  private Post post;
 }
diff --git a/src/main/java/com/krylov/refound/entity/Message.java b/src/main/java/com/krylov/refound/entity/Message.java
new file mode 100644
index 0000000..a317b43
--- /dev/null
+++ b/src/main/java/com/krylov/refound/entity/Message.java
@@ -0,0 +1,35 @@
+package com.krylov.refound.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "messages")
+@Getter
+@Setter
+public class Message {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @ManyToOne
+  private User sender;
+
+  @ManyToOne
+  private User receiver;
+
+  @Column(length = 2000)
+  private String content;
+
+  private LocalDateTime createdAt;
+
+  private boolean isRead;
+}
diff --git a/src/main/java/com/krylov/refound/entity/Post.java b/src/main/java/com/krylov/refound/entity/Post.java
index 5746415..af4dc46 100644
--- a/src/main/java/com/krylov/refound/entity/Post.java
+++ b/src/main/java/com/krylov/refound/entity/Post.java
@@ -1,4 +1,51 @@
 package com.krylov.refound.entity;
 
+import com.krylov.refound.enums.PostStatus;
+import com.krylov.refound.enums.PostType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "posts")
+@Getter
+@Setter
 public class Post {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @Enumerated(EnumType.STRING)
+  private PostType type;
+
+  private String title;
+
+  @Column(length = 2000)
+  private String description;
+
+  private String category;
+
+  private String city;
+
+  private String district;
+
+  private Double latitude;
+  private Double longitude;
+
+  private LocalDateTime createdAt;
+
+  @Enumerated(EnumType.STRING)
+  private PostStatus status;
+
+  @ManyToOne
+  private User user;
 }
diff --git a/src/main/java/com/krylov/refound/entity/User.java b/src/main/java/com/krylov/refound/entity/User.java
index 29be8d8..80f73ca 100644
--- a/src/main/java/com/krylov/refound/entity/User.java
+++ b/src/main/java/com/krylov/refound/entity/User.java
@@ -1,4 +1,27 @@
 package com.krylov.refound.entity;
 
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Table(name = "users")
+@Getter
+@Setter
 public class User {
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @Column(unique = true)
+  private String email;
+  private String password;
+
+  private LocalDateTime createdAt;
 }
diff --git a/src/main/java/com/krylov/refound/enums/ErrorCode.java b/src/main/java/com/krylov/refound/enums/ErrorCode.java
index fd7dd69..50ea4e8 100644
--- a/src/main/java/com/krylov/refound/enums/ErrorCode.java
+++ b/src/main/java/com/krylov/refound/enums/ErrorCode.java
@@ -1,4 +1,8 @@
 package com.krylov.refound.enums;
 
 public enum ErrorCode {
+  VALIDATION_ERROR,
+  NOT_FOUND,
+  INTERNAL_ERROR,
+  BAD_REQUEST
 }
diff --git a/src/main/java/com/krylov/refound/enums/PostStatus.java b/src/main/java/com/krylov/refound/enums/PostStatus.java
index bc7e513..6b51d00 100644
--- a/src/main/java/com/krylov/refound/enums/PostStatus.java
+++ b/src/main/java/com/krylov/refound/enums/PostStatus.java
@@ -1,4 +1,6 @@
 package com.krylov.refound.enums;
 
 public enum PostStatus {
+  ACTIVE,
+  CLOSED
 }
diff --git a/src/main/java/com/krylov/refound/enums/PostType.java b/src/main/java/com/krylov/refound/enums/PostType.java
index 1d3de2d..2d13236 100644
--- a/src/main/java/com/krylov/refound/enums/PostType.java
+++ b/src/main/java/com/krylov/refound/enums/PostType.java
@@ -1,4 +1,6 @@
 package com.krylov.refound.enums;
 
 public enum PostType {
+  LOST,
+  FOUND
 }
diff --git a/src/main/java/com/krylov/refound/exception/ApiException.java b/src/main/java/com/krylov/refound/exception/ApiException.java
index f732800..518fc3d 100644
--- a/src/main/java/com/krylov/refound/exception/ApiException.java
+++ b/src/main/java/com/krylov/refound/exception/ApiException.java
@@ -1,4 +1,18 @@
 package com.krylov.refound.exception;
 
-public class ApiException {
+import com.krylov.refound.enums.ErrorCode;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+public class ApiException  extends RuntimeException {
+
+  private final ErrorCode errorCode;
+  private final HttpStatus status;
+
+  public ApiException(ErrorCode errorCode, String message, HttpStatus status) {
+    super(message);
+    this.errorCode = errorCode;
+    this.status = status;
+  }
 }
diff --git a/src/main/java/com/krylov/refound/exception/ErrorResponse.java b/src/main/java/com/krylov/refound/exception/ErrorResponse.java
index 085f418..5a31a52 100644
--- a/src/main/java/com/krylov/refound/exception/ErrorResponse.java
+++ b/src/main/java/com/krylov/refound/exception/ErrorResponse.java
@@ -1,4 +1,15 @@
 package com.krylov.refound.exception;
 
+import java.time.LocalDateTime;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
 public class ErrorResponse {
+  private LocalDateTime timestamp;
+  private int status;
+  private String error;
+  private String message;
+  private String path;
 }
diff --git a/src/main/java/com/krylov/refound/exception/GlobalExceptionHandler.java b/src/main/java/com/krylov/refound/exception/GlobalExceptionHandler.java
index d348302..c687fc1 100644
--- a/src/main/java/com/krylov/refound/exception/GlobalExceptionHandler.java
+++ b/src/main/java/com/krylov/refound/exception/GlobalExceptionHandler.java
@@ -1,4 +1,56 @@
 package com.krylov.refound.exception;
 
+import com.krylov.refound.enums.ErrorCode;
+import jakarta.servlet.http.HttpServletRequest;
+import java.time.LocalDateTime;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+@Slf4j
 public class GlobalExceptionHandler {
+  @ExceptionHandler(ApiException.class)
+  public ResponseEntity<ErrorResponse> handleApiException(ApiException ex, HttpServletRequest request) {
+    return buildResponse(ex.getStatus(), ex.getErrorCode(), ex.getMessage(), request);
+  }
+
+  @ExceptionHandler(MethodArgumentNotValidException.class)
+  public ResponseEntity<ErrorResponse> handleValidation(MethodArgumentNotValidException ex, HttpServletRequest request) {
+    String message = ex.getBindingResult()
+        .getFieldErrors()
+        .stream()
+        .findFirst()
+        .map(e -> e.getField() + " " + e.getDefaultMessage())
+        .orElse("Validation error");
+
+    return buildResponse(HttpStatus.BAD_REQUEST, ErrorCode.VALIDATION_ERROR, message, request);
+  }
+
+  @ExceptionHandler(Exception.class)
+  public ResponseEntity<ErrorResponse> handleUnknown(Exception ex, HttpServletRequest request) {
+    log.error("Unexpected error", ex);
+
+    return buildResponse(
+        HttpStatus.INTERNAL_SERVER_ERROR,
+        ErrorCode.INTERNAL_ERROR,
+        "Internal server error",
+        request
+    );
+  }
+
+  private ResponseEntity<ErrorResponse> buildResponse(HttpStatus status, ErrorCode code, String message, HttpServletRequest request) {
+    ErrorResponse response = ErrorResponse.builder()
+        .timestamp(LocalDateTime.now())
+        .status(status.value())
+        .error(code.name())
+        .message(message)
+        .path(request.getRequestURI())
+        .build();
+
+    return new ResponseEntity<>(response, status);
+  }
 }
diff --git a/src/main/java/com/krylov/refound/mapper/PostMapper.java b/src/main/java/com/krylov/refound/mapper/PostMapper.java
index a782ac9..fe03703 100644
--- a/src/main/java/com/krylov/refound/mapper/PostMapper.java
+++ b/src/main/java/com/krylov/refound/mapper/PostMapper.java
@@ -1,4 +1,16 @@
 package com.krylov.refound.mapper;
 
-public class PostMapper {
+import com.krylov.refound.dto.PostRequest;
+import com.krylov.refound.dto.PostResponse;
+import com.krylov.refound.entity.Post;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+
+@Mapper(componentModel = "spring")
+public interface PostMapper {
+
+  Post toEntity(PostRequest request);
+
+  @Mapping(source = "user.email", target = "userEmail")
+  PostResponse toResponse(Post post);
 }
diff --git a/src/main/java/com/krylov/refound/repository/FavoriteRepository.java b/src/main/java/com/krylov/refound/repository/FavoriteRepository.java
new file mode 100644
index 0000000..6217e17
--- /dev/null
+++ b/src/main/java/com/krylov/refound/repository/FavoriteRepository.java
@@ -0,0 +1,24 @@
+package com.krylov.refound.repository;
+
+import com.krylov.refound.entity.Favorite;
+import com.krylov.refound.entity.Post;
+import com.krylov.refound.entity.User;
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+
+public interface FavoriteRepository extends JpaRepository<Favorite, Long> {
+
+  boolean existsByUserAndPost(User user, Post post);
+
+  List<Favorite> findByUser(User user);
+
+  void deleteByUserAndPost(User user, Post post);
+
+  @Query("""
+          SELECT f.post.id FROM Favorite f
+          WHERE f.user.id = :userId
+            AND f.post.id IN :postIds
+      """)
+  List<Long> findFavoritePostIds(Long userId, List<Long> postIds);
+}
diff --git a/src/main/java/com/krylov/refound/repository/ImageRepository.java b/src/main/java/com/krylov/refound/repository/ImageRepository.java
new file mode 100644
index 0000000..c2898cb
--- /dev/null
+++ b/src/main/java/com/krylov/refound/repository/ImageRepository.java
@@ -0,0 +1,7 @@
+package com.krylov.refound.repository;
+
+import com.krylov.refound.entity.Image;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ImageRepository extends JpaRepository<Image, Long> {
+}
diff --git a/src/main/java/com/krylov/refound/repository/MessageRepository.java b/src/main/java/com/krylov/refound/repository/MessageRepository.java
new file mode 100644
index 0000000..fc150e8
--- /dev/null
+++ b/src/main/java/com/krylov/refound/repository/MessageRepository.java
@@ -0,0 +1,81 @@
+package com.krylov.refound.repository;
+
+import com.krylov.refound.dto.DialogResponse;
+import com.krylov.refound.entity.Message;
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+
+public interface MessageRepository extends JpaRepository<Message, Long> {
+
+  @Query("""
+          SELECT m FROM Message m
+          WHERE (m.sender.id = :user1 AND m.receiver.id = :user2)
+             OR (m.sender.id = :user2 AND m.receiver.id = :user1)
+          ORDER BY m.createdAt
+      """)
+  List<Message> findChat(Long user1, Long user2);
+
+  @Query("""
+          SELECT m FROM Message m
+          WHERE m.id IN (
+              SELECT MAX(m2.id)
+              FROM Message m2
+              WHERE m2.sender.id = :userId OR m2.receiver.id = :userId
+              GROUP BY 
+                  CASE 
+                      WHEN m2.sender.id = :userId THEN m2.receiver.id
+                      ELSE m2.sender.id
+                  END
+          )
+          ORDER BY m.createdAt DESC
+      """)
+  List<Message> findDialogs(Long userId);
+
+  // 🔥 количество непрочитанных от пользователя
+  @Query("""
+          SELECT COUNT(m) FROM Message m
+          WHERE m.receiver.id = :userId
+            AND m.sender.id = :otherUserId
+            AND m.isRead = false
+      """)
+  int countUnread(Long userId, Long otherUserId);
+
+  // 🔥 пометить как прочитанные
+  @Modifying
+  @Query("""
+          UPDATE Message m
+          SET m.isRead = true
+          WHERE m.receiver.id = :userId
+            AND m.sender.id = :otherUserId
+            AND m.isRead = false
+      """)
+  void markAsRead(Long userId, Long otherUserId);
+
+  @Query("""
+          SELECT new com.krylov.refound.dto.DialogResponse(
+              CAST(
+                  CASE 
+                      WHEN m.sender.id = :userId THEN m.receiver.id
+                      ELSE m.sender.id
+                  END AS long
+              ),
+              CASE 
+                  WHEN m.sender.id = :userId THEN m.receiver.email
+                  ELSE m.sender.email
+              END,
+              m.content,
+              m.createdAt,
+              SUM(CASE WHEN m.receiver.id = :userId AND m.isRead = false THEN 1 ELSE 0 END)
+          )
+          FROM Message m
+          WHERE m.sender.id = :userId OR m.receiver.id = :userId
+          GROUP BY 
+              CASE WHEN m.sender.id = :userId THEN m.receiver.id ELSE m.sender.id END,
+              CASE WHEN m.sender.id = :userId THEN m.receiver.email ELSE m.sender.email END,
+              m.content,
+              m.createdAt
+      """)
+  List<DialogResponse> findDialogsWithUnread(Long userId);
+}
diff --git a/src/main/java/com/krylov/refound/repository/PostRepository.java b/src/main/java/com/krylov/refound/repository/PostRepository.java
index 68f15f8..ccc37c3 100644
--- a/src/main/java/com/krylov/refound/repository/PostRepository.java
+++ b/src/main/java/com/krylov/refound/repository/PostRepository.java
@@ -1,4 +1,45 @@
 package com.krylov.refound.repository;
 
-public interface PostRepository {
-}
+import com.krylov.refound.entity.Post;
+import com.krylov.refound.enums.PostType;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+public interface PostRepository extends JpaRepository<Post, Long>, JpaSpecificationExecutor<Post> {
+
+  Page<Post> findByType(PostType type, Pageable pageable);
+
+  @Query(value = """
+    SELECT * FROM Posts p
+    WHERE 
+        (:type IS NULL OR p.type = :type)
+        AND (:city IS NULL OR p.city = :city)
+        AND (:category IS NULL OR p.category = :category)
+        AND (
+            :lat IS NULL OR :lng IS NULL OR :radius IS NULL OR
+            (
+                6371 * acos(
+                    cos(radians(:lat)) * cos(radians(p.latitude)) *
+                    cos(radians(p.longitude) - radians(:lng)) +
+                    sin(radians(:lat)) * sin(radians(p.latitude))
+                )
+            ) <= :radius
+        )
+    """,
+      countQuery = "SELECT count(*) FROM Posts p",
+      nativeQuery = true)
+  Page<Post> searchWithGeo(
+      @Param("type") String type,
+      @Param("city") String city,
+      @Param("category") String category,
+      @Param("lat") Double lat,
+      @Param("lng") Double lng,
+      @Param("radius") Double radius,
+      Pageable pageable
+  );
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/krylov/refound/repository/UserRepository.java b/src/main/java/com/krylov/refound/repository/UserRepository.java
index 9316b42..1c1fd00 100644
--- a/src/main/java/com/krylov/refound/repository/UserRepository.java
+++ b/src/main/java/com/krylov/refound/repository/UserRepository.java
@@ -1,4 +1,9 @@
 package com.krylov.refound.repository;
 
-public interface UserRepository {
+import com.krylov.refound.entity.User;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+  Optional<User> findByEmail(String email);
 }
diff --git a/src/main/java/com/krylov/refound/service/FavoriteService.java b/src/main/java/com/krylov/refound/service/FavoriteService.java
new file mode 100644
index 0000000..6a7fa71
--- /dev/null
+++ b/src/main/java/com/krylov/refound/service/FavoriteService.java
@@ -0,0 +1,79 @@
+package com.krylov.refound.service;
+
+import com.krylov.refound.entity.Favorite;
+import com.krylov.refound.entity.Post;
+import com.krylov.refound.entity.User;
+import com.krylov.refound.enums.ErrorCode;
+import com.krylov.refound.exception.ApiException;
+import com.krylov.refound.repository.FavoriteRepository;
+import com.krylov.refound.repository.PostRepository;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class FavoriteService {
+  private final FavoriteRepository repository;
+  private final PostRepository postRepository;
+  private final UserService userService;
+
+  public void addToFavorites(Long postId) {
+
+    User user = userService.getCurrentUser();
+
+    Post post = postRepository.findById(postId)
+        .orElseThrow(() -> new ApiException(ErrorCode.NOT_FOUND, "Post not found", HttpStatus.NOT_FOUND));
+
+    if (repository.existsByUserAndPost(user, post)) {
+      return; // уже есть
+    }
+
+    Favorite favorite = new Favorite();
+    favorite.setUser(user);
+    favorite.setPost(post);
+
+    repository.save(favorite);
+  }
+
+  public void removeFromFavorites(Long postId) {
+
+    User user = userService.getCurrentUser();
+
+    Post post = postRepository.findById(postId)
+        .orElseThrow(() -> new ApiException(ErrorCode.NOT_FOUND, "Post not found", HttpStatus.NOT_FOUND));
+
+    repository.deleteByUserAndPost(user, post);
+  }
+
+  public List<Post> getFavorites() {
+    User user = userService.getCurrentUser();
+
+    return repository.findByUser(user)
+        .stream()
+        .map(Favorite::getPost)
+        .toList();
+  }
+
+  public void toggle(Long postId) {
+
+    User user = userService.getCurrentUser();
+
+    Post post = postRepository.findById(postId)
+        .orElseThrow(() -> new ApiException(
+            ErrorCode.NOT_FOUND,
+            "Post not found",
+            HttpStatus.NOT_FOUND
+        ));
+
+    if (repository.existsByUserAndPost(user, post)) {
+      repository.deleteByUserAndPost(user, post);
+    } else {
+      Favorite f = new Favorite();
+      f.setUser(user);
+      f.setPost(post);
+      repository.save(f);
+    }
+  }
+}
diff --git a/src/main/java/com/krylov/refound/service/FileStorageService.java b/src/main/java/com/krylov/refound/service/FileStorageService.java
new file mode 100644
index 0000000..fb19de3
--- /dev/null
+++ b/src/main/java/com/krylov/refound/service/FileStorageService.java
@@ -0,0 +1,42 @@
+package com.krylov.refound.service;
+
+import com.krylov.refound.enums.ErrorCode;
+import com.krylov.refound.exception.ApiException;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.UUID;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+@Service
+public class FileStorageService {
+
+  @Value("${file.upload-dir}")
+  private String uploadDir;
+
+  public String save(MultipartFile file) {
+    try {
+      if (file.isEmpty()) {
+        throw new RuntimeException("File is empty");
+      }
+
+      String fileName = UUID.randomUUID() + "_" + file.getOriginalFilename();
+
+      Path path = Paths.get(uploadDir).toAbsolutePath().normalize();
+      Files.createDirectories(path);
+
+      Path target = path.resolve(fileName);
+
+      Files.copy(file.getInputStream(), target, StandardCopyOption.REPLACE_EXISTING);
+
+      return "/files/" + fileName; // URL
+    } catch (IOException e) {
+      throw new ApiException(ErrorCode.BAD_REQUEST, "Only image files are allowed", HttpStatus.BAD_REQUEST);
+    }
+  }
+}
diff --git a/src/main/java/com/krylov/refound/service/MessageService.java b/src/main/java/com/krylov/refound/service/MessageService.java
new file mode 100644
index 0000000..372ea52
--- /dev/null
+++ b/src/main/java/com/krylov/refound/service/MessageService.java
@@ -0,0 +1,58 @@
+package com.krylov.refound.service;
+
+import com.krylov.refound.dto.DialogResponse;
+import com.krylov.refound.entity.Message;
+import com.krylov.refound.entity.User;
+import com.krylov.refound.enums.ErrorCode;
+import com.krylov.refound.exception.ApiException;
+import com.krylov.refound.repository.MessageRepository;
+import com.krylov.refound.repository.UserRepository;
+import java.time.LocalDateTime;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class MessageService {
+  private final MessageRepository repository;
+  private final UserRepository userRepository;
+  private final UserService userService;
+
+  public Message send(Long receiverId, String content) {
+
+    User sender = userService.getCurrentUser();
+
+    User receiver = userRepository.findById(receiverId)
+        .orElseThrow(() -> new ApiException(ErrorCode.NOT_FOUND, "User not found", HttpStatus.NOT_FOUND));
+
+    Message message = new Message();
+    message.setSender(sender);
+    message.setReceiver(receiver);
+    message.setContent(content);
+    message.setCreatedAt(LocalDateTime.now());
+    message.setRead(false);
+
+    return repository.save(message);
+  }
+
+  public List<Message> getChat(Long userId) {
+    User current = userService.getCurrentUser();
+    return repository.findChat(current.getId(), userId);
+  }
+
+  public List<DialogResponse> getDialogs() {
+    User current = userService.getCurrentUser();
+    return repository.findDialogsWithUnread(current.getId());
+  }
+
+  @Transactional
+  public void markAsRead(Long otherUserId) {
+
+    User current = userService.getCurrentUser();
+
+    repository.markAsRead(current.getId(), otherUserId);
+  }
+}
diff --git a/src/main/java/com/krylov/refound/service/PostService.java b/src/main/java/com/krylov/refound/service/PostService.java
index 4aa394d..6f32b43 100644
--- a/src/main/java/com/krylov/refound/service/PostService.java
+++ b/src/main/java/com/krylov/refound/service/PostService.java
@@ -1,4 +1,149 @@
 package com.krylov.refound.service;
 
+import com.krylov.refound.dto.PostFilter;
+import com.krylov.refound.dto.PostRequest;
+import com.krylov.refound.dto.PostResponse;
+import com.krylov.refound.entity.Image;
+import com.krylov.refound.entity.Post;
+import com.krylov.refound.entity.User;
+import com.krylov.refound.enums.ErrorCode;
+import com.krylov.refound.enums.PostStatus;
+import com.krylov.refound.exception.ApiException;
+import com.krylov.refound.mapper.PostMapper;
+import com.krylov.refound.repository.FavoriteRepository;
+import com.krylov.refound.repository.ImageRepository;
+import com.krylov.refound.repository.PostRepository;
+import com.krylov.refound.util.PostSpecification;
+import java.time.LocalDateTime;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import lombok.RequiredArgsConstructor;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+@Service
+@RequiredArgsConstructor
 public class PostService {
+
+  private final PostRepository repository;
+  private final ImageRepository imageRepository;
+  private final FileStorageService storageService;
+  private final PostMapper mapper;
+  private final UserService userService;
+  private final FavoriteRepository favoriteRepository;
+
+  @CacheEvict(value = "posts", allEntries = true)
+  public PostResponse create(PostRequest request, List<MultipartFile> files) {
+
+    User user = userService.getCurrentUser();
+
+    Post post = mapper.toEntity(request);
+    post.setCreatedAt(LocalDateTime.now());
+    post.setStatus(PostStatus.ACTIVE);
+    post.setUser(user);
+
+    Post savedPost = repository.save(post);
+
+    if (files != null) {
+      for (MultipartFile file : files) {
+        String url = storageService.save(file);
+
+        Image image = new Image();
+        image.setUrl(url);
+        image.setPost(savedPost);
+
+        imageRepository.save(image);
+      }
+    }
+
+    return mapper.toResponse(savedPost);
+  }
+
+  @Cacheable(value = "posts", key = "#filter.toString() + '_' + #pageable.pageNumber")
+  public Page<PostResponse> getFeed(PostFilter filter, Pageable pageable) {
+
+    User user = userService.getCurrentUser();
+
+    Page<Post> posts;
+
+    if (filter.getLat() != null) {
+      posts = repository.searchWithGeo(
+          filter.getType() != null ? filter.getType().name() : null,
+          filter.getCity(),
+          filter.getCategory(),
+          filter.getLat(),
+          filter.getLng(),
+          filter.getRadius(),
+          pageable
+      );
+    } else {
+      posts = repository.findAll(PostSpecification.withFilter(filter), pageable);
+    }
+
+    // 🔥 собираем id всех постов
+    List<Long> postIds = posts.getContent()
+        .stream()
+        .map(Post::getId)
+        .toList();
+
+    // 🔥 одним запросом получаем избранные
+    Set<Long> favoriteIds = new HashSet<>(
+        favoriteRepository.findFavoritePostIds(user.getId(), postIds)
+    );
+
+    return posts.map(post -> {
+      PostResponse response = mapper.toResponse(post);
+      response.setFavorite(favoriteIds.contains(post.getId()));
+      return response;
+    });
+  }
+
+  @Cacheable(value = "post", key = "#id")
+  public PostResponse getById(Long id) {
+    Post post = repository.findById(id)
+        .orElseThrow(() -> new ApiException(ErrorCode.NOT_FOUND, "Post not found", HttpStatus.NOT_FOUND));
+
+    return mapper.toResponse(post);
+  }
+
+  @CacheEvict(value = {"posts", "post"}, allEntries = true)
+  public PostResponse update(Long id, PostRequest request) {
+
+    Post post = repository.findById(id)
+        .orElseThrow(() -> new ApiException(
+            ErrorCode.NOT_FOUND,
+            "Post not found",
+            HttpStatus.NOT_FOUND
+        ));
+
+    post.setTitle(request.getTitle());
+    post.setDescription(request.getDescription());
+    post.setCategory(request.getCategory());
+    post.setCity(request.getCity());
+    post.setDistrict(request.getDistrict());
+    post.setType(request.getType());
+
+    Post updated = repository.save(post);
+
+    return mapper.toResponse(updated);
+  }
+
+  @CacheEvict(value = {"posts", "post"}, allEntries = true)
+  public void delete(Long id) {
+
+    Post post = repository.findById(id)
+        .orElseThrow(() -> new ApiException(
+            ErrorCode.NOT_FOUND,
+            "Post not found",
+            HttpStatus.NOT_FOUND
+        ));
+
+    repository.delete(post);
+  }
 }
diff --git a/src/main/java/com/krylov/refound/service/UserService.java b/src/main/java/com/krylov/refound/service/UserService.java
index 573e0d4..817fe61 100644
--- a/src/main/java/com/krylov/refound/service/UserService.java
+++ b/src/main/java/com/krylov/refound/service/UserService.java
@@ -1,4 +1,27 @@
 package com.krylov.refound.service;
 
+import com.krylov.refound.entity.User;
+import com.krylov.refound.enums.ErrorCode;
+import com.krylov.refound.exception.ApiException;
+import com.krylov.refound.repository.UserRepository;
+import com.krylov.refound.util.SecurityUtils;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
 public class UserService {
+  private final UserRepository repository;
+
+  public User getCurrentUser() {
+    String email = SecurityUtils.getCurrentUserEmail();
+
+    return repository.findByEmail(email)
+        .orElseThrow(() -> new ApiException(
+            ErrorCode.NOT_FOUND,
+            "User not found",
+            HttpStatus.NOT_FOUND
+        ));
+  }
 }
diff --git a/src/main/java/com/krylov/refound/service/security/AuthService.java b/src/main/java/com/krylov/refound/service/security/AuthService.java
index beb2d56..08133ae 100644
--- a/src/main/java/com/krylov/refound/service/security/AuthService.java
+++ b/src/main/java/com/krylov/refound/service/security/AuthService.java
@@ -1,4 +1,4 @@
-package com.krylov.refound.service;
+package com.krylov.refound.service.security;
 
 import com.krylov.refound.dto.AuthRequest;
 import com.krylov.refound.dto.AuthResponse;
diff --git a/src/main/java/com/krylov/refound/service/security/CustomUserDetailsService.java b/src/main/java/com/krylov/refound/service/security/CustomUserDetailsService.java
index e080a45..6e46414 100644
--- a/src/main/java/com/krylov/refound/service/security/CustomUserDetailsService.java
+++ b/src/main/java/com/krylov/refound/service/security/CustomUserDetailsService.java
@@ -1,4 +1,4 @@
-package com.krylov.refound.service;
+package com.krylov.refound.service.security;
 
 import com.krylov.refound.entity.User;
 import com.krylov.refound.repository.UserRepository;
diff --git a/src/main/java/com/krylov/refound/service/security/JwtFilter.java b/src/main/java/com/krylov/refound/service/security/JwtFilter.java
index 528234d..a27376a 100644
--- a/src/main/java/com/krylov/refound/service/security/JwtFilter.java
+++ b/src/main/java/com/krylov/refound/service/security/JwtFilter.java
@@ -1,4 +1,4 @@
-package com.krylov.refound.service;
+package com.krylov.refound.service.security;
 
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
diff --git a/src/main/java/com/krylov/refound/service/security/JwtService.java b/src/main/java/com/krylov/refound/service/security/JwtService.java
index 5ce5c0d..027bb8f 100644
--- a/src/main/java/com/krylov/refound/service/security/JwtService.java
+++ b/src/main/java/com/krylov/refound/service/security/JwtService.java
@@ -1,4 +1,4 @@
-package com.krylov.refound.service;
+package com.krylov.refound.service.security;
 
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.security.Keys;
diff --git a/src/main/java/com/krylov/refound/util/JwtHandshakeInterceptor.java b/src/main/java/com/krylov/refound/util/JwtHandshakeInterceptor.java
new file mode 100644
index 0000000..a0aba15
--- /dev/null
+++ b/src/main/java/com/krylov/refound/util/JwtHandshakeInterceptor.java
@@ -0,0 +1,46 @@
+package com.krylov.refound.util;
+
+import java.util.List;
+import java.util.Map;
+import org.springframework.http.server.ServerHttpRequest;
+import org.springframework.http.server.ServerHttpResponse;
+import org.springframework.web.socket.WebSocketHandler;
+import org.springframework.web.socket.server.HandshakeInterceptor;
+
+public class JwtHandshakeInterceptor implements HandshakeInterceptor {
+
+  @Override
+  public boolean beforeHandshake(
+      ServerHttpRequest request,
+      ServerHttpResponse response,
+      WebSocketHandler wsHandler,
+      Map<String, Object> attributes
+  ) throws Exception {
+
+    List<String> auth = request.getHeaders().get("Authorization");
+
+    if (auth == null || auth.isEmpty()) {
+      return false; // запретить подключение
+    }
+
+    String token = auth.get(0).replace("Bearer ", "");
+
+    // 🔥 проверяем JWT
+    String userEmail = JwtUtils.validateTokenAndGetEmail(token);
+
+    if (userEmail == null) {
+      return false;
+    }
+
+    attributes.put("userEmail", userEmail);
+    return true;
+  }
+
+  @Override
+  public void afterHandshake(
+      ServerHttpRequest request,
+      ServerHttpResponse response,
+      WebSocketHandler wsHandler,
+      Exception exception
+  ) { }
+}
\ No newline at end of file
diff --git a/src/main/java/com/krylov/refound/util/JwtUtils.java b/src/main/java/com/krylov/refound/util/JwtUtils.java
new file mode 100644
index 0000000..ab42a8d
--- /dev/null
+++ b/src/main/java/com/krylov/refound/util/JwtUtils.java
@@ -0,0 +1,23 @@
+package com.krylov.refound.util;
+
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.security.Keys;
+import org.springframework.stereotype.Component;
+
+@Component
+public class JwtUtils {
+  private static final String SECRET = "SECRET_KEY"; // заменить на env var
+
+  public static String validateTokenAndGetEmail(String token) {
+    try {
+      return Jwts.parserBuilder()
+          .setSigningKey(Keys.hmacShaKeyFor(SECRET.getBytes()))
+          .build()
+          .parseClaimsJws(token)
+          .getBody()
+          .getSubject();
+    } catch (Exception e) {
+      return null;
+    }
+  }
+}
diff --git a/src/main/java/com/krylov/refound/util/PostSpecification.java b/src/main/java/com/krylov/refound/util/PostSpecification.java
new file mode 100644
index 0000000..e97ee56
--- /dev/null
+++ b/src/main/java/com/krylov/refound/util/PostSpecification.java
@@ -0,0 +1,58 @@
+package com.krylov.refound.util;
+
+import com.krylov.refound.dto.PostFilter;
+import com.krylov.refound.entity.Post;
+import jakarta.persistence.criteria.Expression;
+import jakarta.persistence.criteria.Predicate;
+import java.util.ArrayList;
+import java.util.List;
+import org.springframework.data.jpa.domain.Specification;
+
+public class PostSpecification {
+  public static Specification<Post> withFilter(PostFilter filter) {
+    return (root, query, cb) -> {
+
+      List<Predicate> predicates = new ArrayList<>();
+
+
+
+      if (filter.getType() != null) {
+        predicates.add(cb.equal(root.get("type"), filter.getType()));
+      }
+
+      if (filter.getCity() != null) {
+        predicates.add(cb.equal(root.get("city"), filter.getCity()));
+      }
+
+      if (filter.getCategory() != null) {
+        predicates.add(cb.equal(root.get("category"), filter.getCategory()));
+      }
+
+      if (filter.getDistrict() != null) {
+        predicates.add(cb.equal(root.get("district"), filter.getDistrict()));
+      }
+      if (filter.getSearch() != null && !filter.getSearch().isBlank()) {
+        String search = "%" + filter.getSearch().toLowerCase() + "%";
+
+        predicates.add(cb.or(
+            cb.like(cb.lower(root.get("title")), search),
+            cb.like(cb.lower(root.get("description")), search)
+        ));
+      }
+      if (filter.getLat() != null && filter.getLng() != null && filter.getRadius() != null) {
+
+        Expression<Double> distance = cb.function(
+            "6371 * acos(cos(radians(?1)) * cos(radians(latitude)) * " +
+                "cos(radians(longitude) - radians(?2)) + sin(radians(?1)) * sin(radians(latitude)))",
+            Double.class,
+            cb.literal(filter.getLat()),
+            cb.literal(filter.getLng())
+        );
+
+        predicates.add(cb.lessThanOrEqualTo(distance, filter.getRadius()));
+      }
+
+      return cb.and(predicates.toArray(new Predicate[0]));
+    };
+  }
+}
diff --git a/src/main/java/com/krylov/refound/util/SecurityUtils.java b/src/main/java/com/krylov/refound/util/SecurityUtils.java
index 6e4ef5b..0eb9e13 100644
--- a/src/main/java/com/krylov/refound/util/SecurityUtils.java
+++ b/src/main/java/com/krylov/refound/util/SecurityUtils.java
@@ -1,4 +1,11 @@
 package com.krylov.refound.util;
 
+import org.springframework.security.core.context.SecurityContextHolder;
+
 public class SecurityUtils {
+  public static String getCurrentUserEmail() {
+    return SecurityContextHolder.getContext()
+        .getAuthentication()
+        .getName();
+  }
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
deleted file mode 100644
index cd8a3f8..0000000
--- a/src/main/resources/application.properties
+++ /dev/null
@@ -1 +0,0 @@
-spring.application.name=ReFound
diff --git a/src/main/resources/application.yaml b/src/main/resources/application.yaml
new file mode 100644
index 0000000..14183e3
--- /dev/null
+++ b/src/main/resources/application.yaml
@@ -0,0 +1,36 @@
+spring:
+  servlet:
+    multipart:
+      max-file-size: 5MB
+      max-request-size: 10MB
+
+  datasource:
+    url: jdbc:postgresql://localhost:5432/nahodka
+    username: user
+    password: pass
+    driver-class-name: org.postgresql.Driver
+
+  jpa:
+    hibernate:
+      ddl-auto: update # на старте удобно
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+
+  data:
+    redis:
+      host: localhost
+      port: 6379
+
+  cache:
+    type: redis
+
+  liquibase:
+    change-log: classpath:db/changelog/db.changelog-master.yaml
+
+file:
+  upload-dir: uploads/
+
+cache:
+  ttl: 300
\ No newline at end of file
diff --git a/src/main/resources/db/changelog/001-init.yaml b/src/main/resources/db/changelog/001-init.yaml
new file mode 100644
index 0000000..904d0b1
--- /dev/null
+++ b/src/main/resources/db/changelog/001-init.yaml
@@ -0,0 +1,57 @@
+databaseChangeLog:
+  - changeSet:
+      id: 001-create-users
+      author: you
+      changes:
+        - createTable:
+            tableName: users
+            columns:
+              - column: { name: id, type: BIGSERIAL, constraints: { primaryKey: true } }
+              - column: { name: email, type: VARCHAR(255), constraints: { nullable: false, unique: true } }
+              - column: { name: password, type: VARCHAR(255), constraints: { nullable: false } }
+              - column: { name: created_at, type: TIMESTAMP }
+
+  - changeSet:
+      id: 002-create-posts
+      author: you
+      changes:
+        - createTable:
+            tableName: posts
+            columns:
+              - column: { name: id, type: BIGSERIAL, constraints: { primaryKey: true } }
+              - column: { name: type, type: VARCHAR(20) }
+              - column: { name: title, type: VARCHAR(255) }
+              - column: { name: description, type: TEXT }
+              - column: { name: category, type: VARCHAR(100) }
+              - column: { name: city, type: VARCHAR(100) }
+              - column: { name: district, type: VARCHAR(100) }
+              - column: { name: latitude, type: DOUBLE }
+              - column: { name: longitude, type: DOUBLE }
+              - column: { name: status, type: VARCHAR(20) }
+              - column: { name: created_at, type: TIMESTAMP }
+              - column: { name: user_id, type: BIGINT }
+
+        - addForeignKeyConstraint:
+            baseTableName: posts
+            baseColumnNames: user_id
+            referencedTableName: users
+            referencedColumnNames: id
+            constraintName: fk_posts_user   # ✅ ДОБАВИТЬ
+
+  - changeSet:
+      id: 003-create-images
+      author: you
+      changes:
+        - createTable:
+            tableName: images
+            columns:
+              - column: { name: id, type: BIGSERIAL, constraints: { primaryKey: true } }
+              - column: { name: url, type: VARCHAR(500) }
+              - column: { name: post_id, type: BIGINT }
+
+        - addForeignKeyConstraint:
+            baseTableName: images
+            baseColumnNames: post_id
+            referencedTableName: posts
+            referencedColumnNames: id
+            constraintName: fk_images_post  # ✅
\ No newline at end of file
diff --git a/src/main/resources/db/changelog/002-message.yaml b/src/main/resources/db/changelog/002-message.yaml
new file mode 100644
index 0000000..9a5f17c
--- /dev/null
+++ b/src/main/resources/db/changelog/002-message.yaml
@@ -0,0 +1,37 @@
+databaseChangeLog:
+  - changeSet:
+      id: 004-create-messages
+      author: you
+      changes:
+        - createTable:
+            tableName: messages
+            columns:
+              - column: { name: id, type: BIGSERIAL, constraints: { primaryKey: true } }
+              - column: { name: sender_id, type: BIGINT }
+              - column: { name: receiver_id, type: BIGINT }
+              - column: { name: content, type: TEXT }
+              - column: { name: created_at, type: TIMESTAMP }
+              - column: { name: is_read, type: BOOLEAN }
+
+        - addForeignKeyConstraint:
+            baseTableName: messages
+            baseColumnNames: sender_id
+            referencedTableName: users
+            referencedColumnNames: id
+            constraintName: fk_messages_sender  # ✅
+
+        - addForeignKeyConstraint:
+            baseTableName: messages
+            baseColumnNames: receiver_id
+            referencedTableName: users
+            referencedColumnNames: id
+            constraintName: fk_messages_receiver  # ✅
+
+        # 🔥 индекс для чата
+        - createIndex:
+            tableName: messages
+            indexName: idx_messages_users
+            columns:
+              - column: { name: sender_id }
+              - column: { name: receiver_id }
+              - column: { name: created_at }
\ No newline at end of file
diff --git a/src/main/resources/db/changelog/003-favorite.yaml b/src/main/resources/db/changelog/003-favorite.yaml
new file mode 100644
index 0000000..c9a1ea5
--- /dev/null
+++ b/src/main/resources/db/changelog/003-favorite.yaml
@@ -0,0 +1,31 @@
+databaseChangeLog:
+  - changeSet:
+      id: 005-create-favorites
+      author: you
+      changes:
+        - createTable:
+            tableName: favorites
+            columns:
+              - column: { name: id, type: BIGSERIAL, constraints: { primaryKey: true } }
+              - column: { name: user_id, type: BIGINT }
+              - column: { name: post_id, type: BIGINT }
+
+        - addForeignKeyConstraint:
+            baseTableName: favorites
+            baseColumnNames: user_id
+            referencedTableName: users
+            referencedColumnNames: id
+            constraintName: fk_favorites_user  # ✅
+
+        - addForeignKeyConstraint:
+            baseTableName: favorites
+            baseColumnNames: post_id
+            referencedTableName: posts
+            referencedColumnNames: id
+            constraintName: fk_favorites_post  # ✅
+
+        # 🔥 защита от дублей
+        - addUniqueConstraint:
+            tableName: favorites
+            columnNames: user_id, post_id
+            constraintName: unique_user_post
\ No newline at end of file
diff --git a/src/main/resources/db/changelog/db.changelog-master.yaml b/src/main/resources/db/changelog/db.changelog-master.yaml
new file mode 100644
index 0000000..b0b3410
--- /dev/null
+++ b/src/main/resources/db/changelog/db.changelog-master.yaml
@@ -0,0 +1,9 @@
+databaseChangeLog:
+  - include:
+      file: db/changelog/001-init.yaml
+
+  - include:
+      file: db/changelog/002-message.yaml
+
+  - include:
+      file: db/changelog/003-favorite.yaml
\ No newline at end of file