feat: Implement Recent Searches functionality in SearchScreen for improved user experience

app/src/main/java/com/rosetta/messenger/ui/chats/SearchScreen.kt

@@ -4,6 +4,9 @@ import androidx.compose.animation.*
 import androidx.compose.animation.core.*
 import androidx.compose.foundation.*
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.*
@@ -11,12 +14,15 @@ import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import com.rosetta.messenger.data.RecentSearchesManager
 import com.rosetta.messenger.network.ProtocolState
 import com.rosetta.messenger.network.SearchUser
 
@@ -37,7 +43,8 @@ fun SearchScreen(
     onBackClick: () -> Unit,
     onUserSelect: (SearchUser) -> Unit
 ) {
-    val backgroundColor = if (isDarkTheme) Color(0xFF121212) else Color(0xFFF8F9FA)
+    // Цвета ТОЧНО как в ChatsListScreen
+    val backgroundColor = if (isDarkTheme) Color(0xFF1A1A1A) else Color(0xFFFFFFFF)
     val textColor = if (isDarkTheme) Color.White else Color(0xFF1a1a1a)
     val secondaryTextColor = if (isDarkTheme) Color(0xFFB0B0B0) else Color(0xFF6c757d)
     val surfaceColor = if (isDarkTheme) Color(0xFF1E1E1E) else Color.White
@@ -48,6 +55,9 @@ fun SearchScreen(
     val searchResults by searchViewModel.searchResults.collectAsState()
     val isSearching by searchViewModel.isSearching.collectAsState()
     
+    // Recent users (не текстовые запросы, а пользователи)
+    val recentUsers by RecentSearchesManager.recentUsers.collectAsState()
+    
     // Устанавливаем privateKeyHash
     LaunchedEffect(privateKeyHash) {
         if (privateKeyHash.isNotEmpty()) {
@@ -69,8 +79,7 @@ fun SearchScreen(
             // Кастомный header с полем ввода на всю ширину
             Surface(
                 modifier = Modifier.fillMaxWidth(),
-                color = backgroundColor,
-                shadowElevation = 4.dp
+                color = backgroundColor
             ) {
                 Row(
                     modifier = Modifier
@@ -157,20 +166,163 @@ fun SearchScreen(
         },
         containerColor = backgroundColor
     ) { paddingValues ->
-        // Контент - результаты поиска
+        // Контент - показываем recent users если поле пустое, иначе результаты
         Box(
             modifier = Modifier
                 .fillMaxSize()
                 .padding(paddingValues)
         ) {
-            SearchResultsList(
-                searchResults = searchResults,
-                isSearching = isSearching,
-                currentUserPublicKey = currentUserPublicKey,
-                isDarkTheme = isDarkTheme,
-                onUserClick = { user ->
-                    onUserSelect(user)
+            if (searchQuery.isEmpty() && recentUsers.isNotEmpty()) {
+                // Recent Users с аватарками
+                LazyColumn(
+                    modifier = Modifier.fillMaxSize(),
+                    contentPadding = PaddingValues(vertical = 8.dp)
+                ) {
+                    item {
+                        Row(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(horizontal = 16.dp, vertical = 12.dp),
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                "Recent",
+                                fontSize = 14.sp,
+                                fontWeight = FontWeight.SemiBold,
+                                color = secondaryTextColor
+                            )
+                            TextButton(onClick = { RecentSearchesManager.clearAll() }) {
+                                Text(
+                                    "Clear All",
+                                    fontSize = 13.sp,
+                                    color = PrimaryBlue
+                                )
+                            }
+                        }
+                    }
+                    
+                    items(recentUsers, key = { it.publicKey }) { user ->
+                        RecentUserItem(
+                            user = user,
+                            isDarkTheme = isDarkTheme,
+                            textColor = textColor,
+                            secondaryTextColor = secondaryTextColor,
+                            onClick = {
+                                RecentSearchesManager.addUser(user)
+                                onUserSelect(user)
+                            },
+                            onRemove = {
+                                RecentSearchesManager.removeUser(user.publicKey)
+                            }
+                        )
+                    }
                 }
+            } else {
+                // Search Results
+                SearchResultsList(
+                    searchResults = searchResults,
+                    isSearching = isSearching,
+                    currentUserPublicKey = currentUserPublicKey,
+                    isDarkTheme = isDarkTheme,
+                    onUserClick = { user ->
+                        // Сохраняем пользователя в историю
+                        RecentSearchesManager.addUser(user)
+                        onUserSelect(user)
+                    }
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun RecentUserItem(
+    user: SearchUser,
+    isDarkTheme: Boolean,
+    textColor: Color,
+    secondaryTextColor: Color,
+    onClick: () -> Unit,
+    onRemove: () -> Unit
+) {
+    val displayName = user.title.ifEmpty { 
+        user.username.ifEmpty { 
+            user.publicKey.take(8) + "..." 
+        } 
+    }
+    // Используем getInitials из ChatsListScreen
+    val initials = getInitials(displayName)
+    
+    // Используем getAvatarColor из ChatsListScreen для правильных цветов
+    val avatarColors = getAvatarColor(user.publicKey, isDarkTheme)
+    
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onClick)
+            .padding(horizontal = 16.dp, vertical = 10.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        // Avatar
+        Box(
+            modifier = Modifier
+                .size(48.dp)
+                .clip(CircleShape)
+                .background(avatarColors.backgroundColor),
+            contentAlignment = Alignment.Center
+        ) {
+            Text(
+                text = initials,
+                fontSize = 16.sp,
+                fontWeight = FontWeight.SemiBold,
+                color = avatarColors.textColor
+            )
+        }
+        
+        Spacer(modifier = Modifier.width(12.dp))
+        
+        // Name and username
+        Column(modifier = Modifier.weight(1f)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    text = displayName,
+                    fontSize = 16.sp,
+                    fontWeight = FontWeight.Medium,
+                    color = textColor,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis
+                )
+                if (user.verified != 0) {
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Icon(
+                        Icons.Default.Verified,
+                        contentDescription = "Verified",
+                        tint = PrimaryBlue,
+                        modifier = Modifier.size(16.dp)
+                    )
+                }
+            }
+            if (user.username.isNotEmpty()) {
+                Text(
+                    text = "@${user.username}",
+                    fontSize = 14.sp,
+                    color = secondaryTextColor,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis
+                )
+            }
+        }
+        
+        // Remove button
+        IconButton(
+            onClick = onRemove,
+            modifier = Modifier.size(40.dp)
+        ) {
+            Icon(
+                Icons.Default.Close,
+                contentDescription = "Remove",
+                tint = secondaryTextColor,
+                modifier = Modifier.size(20.dp)
             )
         }
     }