Fix chat search breaking vertical scrolling and layout (Issue #44)

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatBubble.kt

@@ -72,6 +72,7 @@ fun ChatBubble(
     message: ChatMessage,
     isDarkTheme: Boolean,
     searchQuery: String = "",
+    isCurrentMatch: Boolean = false,
     modifier: Modifier = Modifier,
 ) {
     val screenWidth = LocalConfiguration.current.screenWidthDp.dp
@@ -86,10 +87,28 @@ fun ChatBubble(
                 ),
     ) {
         when (message.role) {
-            MessageRole.USER -> UserBubble(message, maxBubbleWidth, searchQuery, modifier)
+            MessageRole.USER -> {
-            MessageRole.ASSISTANT -> AssistantBubble(message, maxBubbleWidth, isDarkTheme, searchQuery, modifier)
+                UserBubble(message, maxBubbleWidth, searchQuery, isCurrentMatch, modifier)
-            MessageRole.SYSTEM -> SystemBubble(message, modifier)
+            }
-            MessageRole.TOOL -> ToolBubble(message, isDarkTheme, modifier)
+
+            MessageRole.ASSISTANT -> {
+                AssistantBubble(
+                    message,
+                    maxBubbleWidth,
+                    isDarkTheme,
+                    searchQuery,
+                    isCurrentMatch,
+                    modifier,
+                )
+            }
+
+            MessageRole.SYSTEM -> {
+                SystemBubble(message, modifier)
+            }
+
+            MessageRole.TOOL -> {
+                ToolBubble(message, isDarkTheme, modifier)
+            }
         }
     }
 }
@@ -99,14 +118,15 @@ private fun UserBubble(
     message: ChatMessage,
     maxWidth: androidx.compose.ui.unit.Dp,
     searchQuery: String = "",
+    isCurrentMatch: Boolean = false,
     modifier: Modifier = Modifier,
 ) {
     val clipboardManager = LocalClipboardManager.current
 
     val highlightedText =
-        remember(message.content, searchQuery) {
+        remember(message.content, searchQuery, isCurrentMatch) {
             if (searchQuery.isNotBlank()) {
-                buildHighlightedString(message.content, searchQuery)
+                buildHighlightedString(message.content, searchQuery, isCurrentMatch)
             } else {
                 AnnotatedString(message.content)
             }
@@ -176,6 +196,7 @@ private fun AssistantBubble(
     maxWidth: androidx.compose.ui.unit.Dp,
     isDarkTheme: Boolean,
     searchQuery: String = "",
+    isCurrentMatch: Boolean = false,
     modifier: Modifier = Modifier,
 ) {
     val bubbleColor = if (isDarkTheme) AssistantBubble else AssistantBubbleLight
@@ -222,6 +243,7 @@ private fun AssistantBubble(
                         text = message.content,
                         textColor = textColor,
                         searchQuery = searchQuery,
+                        isCurrentMatch = isCurrentMatch,
                     )
                 }
                 if (!message.isStreaming) {
@@ -353,13 +375,14 @@ private fun RichText(
     text: String,
     textColor: Color,
     searchQuery: String = "",
+    isCurrentMatch: Boolean = false,
 ) {
     val uriHandler = LocalUriHandler.current
     val urlPattern = remember { Regex("""https?://[^\s)>\]\u0022\u0027]+""") }
     val linkColor = MaterialTheme.colorScheme.primary
-    val searchHighlightColor = Color(0xFFFFF176).copy(alpha = 0.9f)
+    val searchHighlightColor = if (isCurrentMatch) Color(0xFFF57C00) else Color(0xFFFFF176).copy(alpha = 0.9f)
     val annotated =
-        remember(text, searchQuery) {
+        remember(text, searchQuery, isCurrentMatch) {
             buildAnnotatedString {
                 var i = 0
                 val src = text
@@ -477,8 +500,9 @@ private fun formatTimestamp(timestamp: Long): String {
 private fun buildHighlightedString(
     text: String,
     query: String,
+    isCurrentMatch: Boolean = false,
 ): AnnotatedString {
-    val highlightColor = Color(0xFFFFF176).copy(alpha = 0.9f)
+    val highlightColor = if (isCurrentMatch) Color(0xFFF57C00) else Color(0xFFFFF176).copy(alpha = 0.9f)
     return buildAnnotatedString {
         var i = 0
         while (i < text.length) {

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatScreen.kt

@@ -31,9 +31,11 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.Send
 import androidx.compose.material.icons.filled.Add
@@ -78,6 +80,7 @@ import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -165,19 +168,16 @@ fun ChatScreen(
                 ),
         )
 
-    // Search: filter messages to matches only
-    val filteredMessages =
-        if (state.isSearchActive && state.searchQuery.isNotBlank()) {
-            state.messages.filterIndexed { index, _ -> index in state.searchMatchIndices }
-        } else {
-            state.messages
-        }
-
     // Scroll to current search match
-    LaunchedEffect(state.isSearchActive, state.currentSearchMatchIndex) {
+    LaunchedEffect(state.isSearchActive, state.currentSearchMatchIndex, state.searchMatchIndices) {
-        if (state.isSearchActive && state.currentSearchMatchIndex >= 0 && filteredMessages.isNotEmpty()) {
+        if (state.isSearchActive &&
+            state.currentSearchMatchIndex >= 0 &&
+            state.currentSearchMatchIndex < state.searchMatchIndices.size &&
+            state.messages.isNotEmpty()
+        ) {
+            val targetIndex = state.searchMatchIndices[state.currentSearchMatchIndex]
             listState.animateScrollToItem(
-                state.currentSearchMatchIndex.coerceIn(0, filteredMessages.lastIndex),
+                targetIndex.coerceIn(0, state.messages.lastIndex),
             )
         }
     }
@@ -336,33 +336,33 @@ fun ChatScreen(
                         .weight(1f)
                         .fillMaxWidth(),
             ) {
-                if (filteredMessages.isEmpty() && !state.isLoading) {
+                if (state.messages.isEmpty() && !state.isLoading) {
-                    if (state.isSearchActive && state.searchQuery.isNotBlank()) {
-                        EmptyState(
-                            title = "No matches",
-                            subtitle = "No messages match \"${state.searchQuery}\"",
-                        )
-                    } else {
                     EmptyState(
                         title = "Ready to chat",
                         subtitle = "Send a message to start a conversation",
                     )
                 }
-                }
 
                 LazyColumn(
                     state = listState,
                     modifier = Modifier.fillMaxSize(),
                     contentPadding = PaddingValues(vertical = 8.dp),
                 ) {
-                    items(
+                    itemsIndexed(
-                        items = filteredMessages,
+                        items = state.messages,
-                        key = { it.id },
+                        key = { _, message -> message.id },
-                    ) { message ->
+                    ) { index, message ->
+                        val isCurrentMatch =
+                            state.isSearchActive &&
+                                state.currentSearchMatchIndex >= 0 &&
+                                state.currentSearchMatchIndex < state.searchMatchIndices.size &&
+                                state.searchMatchIndices[state.currentSearchMatchIndex] == index
+
                         ChatBubble(
                             message = message,
                             isDarkTheme = isDark,
                             searchQuery = if (state.isSearchActive) state.searchQuery else "",
+                            isCurrentMatch = isCurrentMatch,
                         )
                     }
 
@@ -708,6 +708,8 @@ private fun SearchBarRow(
     onNavigateDown: () -> Unit,
     onClose: () -> Unit,
 ) {
+    val isError = searchQuery.isNotEmpty() && searchMatchCount == 0
+
     Row(
         modifier = Modifier.fillMaxWidth(),
         verticalAlignment = Alignment.CenterVertically,
@@ -718,6 +720,8 @@ private fun SearchBarRow(
             modifier = Modifier.weight(1f),
             placeholder = { Text("Search messages…") },
             singleLine = true,
+            isError = isError,
+            keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
             trailingIcon = {
                 if (searchQuery.isNotEmpty()) {
                     IconButton(onClick = { onQueryChange("") }) {
@@ -726,20 +730,34 @@ private fun SearchBarRow(
                 }
             },
         )
-        if (searchMatchCount > 0 && searchQuery.isNotEmpty()) {
+        if (searchQuery.isNotEmpty()) {
+            val countText =
+                if (searchMatchCount > 0) {
+                    "${currentMatchIndex + 1}/$searchMatchCount"
+                } else {
+                    "0/0"
+                }
             Text(
-                text = "${currentMatchIndex + 1}/$searchMatchCount",
+                text = countText,
-                style = MaterialTheme.typography.bodySmall,
+                style =
+                    MaterialTheme.typography.bodySmall.copy(
+                        color =
+                            if (isError) {
+                                MaterialTheme.colorScheme.error
+                            } else {
+                                MaterialTheme.colorScheme.onSurfaceVariant
+                            },
+                    ),
                 modifier = Modifier.padding(horizontal = 4.dp),
             )
         }
-        IconButton(onClick = onNavigateUp) {
+        IconButton(onClick = onNavigateUp, enabled = searchMatchCount > 0) {
             Icon(
                 Icons.Filled.KeyboardArrowUp,
                 contentDescription = "Previous match",
             )
         }
-        IconButton(onClick = onNavigateDown) {
+        IconButton(onClick = onNavigateDown, enabled = searchMatchCount > 0) {
             Icon(
                 Icons.Filled.KeyboardArrowDown,
                 contentDescription = "Next match",