feat: render markdown and math formulas in streaming messages and add link support

- Replace plain Text() with StreamingMarkdownText in AssistantStreamingBubble
  so markdown formatting, code blocks, math formulas, and tables render
  properly during token streaming
- Add StreamingMarkdownText composable (bypasses completed-message cache)
- Add markdown link [text](url) support to inline formatter

Co-authored-by: Godzilla675 <131464726+Godzilla675@users.noreply.github.com>

Author: Copilot

app/src/main/java/com/dark/tool_neuron/ui/components/MarkdownText.kt

@@ -95,6 +95,28 @@ fun MarkdownText(text: String, modifier: Modifier = Modifier) {
     }
 }
 
+/**
+ * Streaming-optimised markdown renderer.
+ * Re-parses on every text change (bypasses the completed-message cache).
+ * Used in [AssistantStreamingBubble] so the user sees formatted text while
+ * tokens are still being generated.
+ */
+@Composable
+fun StreamingMarkdownText(text: String, modifier: Modifier = Modifier) {
+    val parsedContent = remember(text) { parseMarkdown(text) }
+    val colors = InlineColors(
+        codeBg = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f),
+        highlightBg = MaterialTheme.colorScheme.primary.copy(alpha = 0.3f),
+        mathColor = MaterialTheme.colorScheme.primary
+    )
+    Column(
+        modifier = modifier.padding(horizontal = Standards.SpacingXs),
+        verticalArrangement = Arrangement.spacedBy(Standards.SpacingXs)
+    ) {
+        parsedContent.forEach { element -> MarkdownElementView(element, colors) }
+    }
+}
+
 /**
  * Lazy version — each markdown element is a separate LazyList item.
  * Only visible items are composed. Use inside a LazyColumn.
@@ -492,6 +514,20 @@ internal fun buildInlineFormatted(text: String, colors: InlineColors): Annotated
                     i = end + 1
                 } else { append(chars[i]); i++ }
             }
+            // Markdown link [text](url)
+            chars[i] == '[' -> {
+                val closeBracket = text.indexOf(']', i + 1)
+                if (closeBracket != -1 && closeBracket + 1 < chars.size && chars[closeBracket + 1] == '(') {
+                    val closeParen = text.indexOf(')', closeBracket + 2)
+                    if (closeParen != -1) {
+                        val linkText = text.substring(i + 1, closeBracket)
+                        withStyle(SpanStyle(color = colors.mathColor, textDecoration = TextDecoration.Underline)) {
+                            append(buildInlineFormatted(linkText, colors))
+                        }
+                        i = closeParen + 1
+                    } else { append(chars[i]); i++ }
+                } else { append(chars[i]); i++ }
+            }
             // Default — handle surrogates
             else -> {
                 val c = chars[i]

app/src/main/java/com/dark/tool_neuron/ui/screen/home/MessageBubbles.kt

@@ -24,6 +24,7 @@ import androidx.compose.ui.unit.dp
 import com.dark.tool_neuron.models.messages.Messages
 import com.dark.tool_neuron.ui.components.ExpandCollapseIcon
 import com.dark.tool_neuron.ui.components.MarkdownText
+import com.dark.tool_neuron.ui.components.StreamingMarkdownText
 import com.dark.tool_neuron.ui.icons.TnIcons
 import com.dark.tool_neuron.ui.theme.Motion
 import java.util.Base64
@@ -88,10 +89,8 @@ internal fun AssistantStreamingBubble(text: String) {
                         .background(MaterialTheme.colorScheme.primary, shape = CircleShape)
                 )
 
-                Text(
+                StreamingMarkdownText(
                     text = parsedMessage.actualContent.ifEmpty { "..." },
-                    style = MaterialTheme.typography.bodyMedium,
-                    color = MaterialTheme.colorScheme.onSurface,
                     modifier = Modifier.weight(1f)
                 )
             }