fix(markdown): correct blockquote width regression coverage

Author: iosif2

crates/forge_markdown_stream/src/lib.rs

@@ -192,10 +192,9 @@ mod tests {
         let fixture = "> supercalifragilistic\n> 한글 공백\n";
         let actual = fixture_rendered_output(fixture, 10);
         let expected = concat!(
-            "│ super\n",
-            "│ calif\n",
-            "│ ragil\n",
-            "│ istic\n",
+            "│ supercal\n",
+            "│ ifragili\n",
+            "│ stic\n",
             "│ 한글\n",
             "│ 공백"
         );
@@ -209,9 +208,22 @@ mod tests {
         let actual = fixture_rendered_output(fixture, 20);
         let expected = concat!(
             "│ 링크\n",
-            "│ (https://exampl\n",
-            "│ e.com/very/long\n",
-            "│ /path) 설명"
+            "│ (https://example.c\n",
+            "│ om/very/long/path)\n",
+            "│ 설명"
+        );
+
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn test_streaming_renderer_wraps_nested_blockquotes_with_correct_prefix_width() {
+        let fixture = ">> supercalifragilistic\n";
+        let actual = fixture_rendered_output(fixture, 12);
+        let expected = concat!(
+            "│ │ supercal\n",
+            "│ │ ifragili\n",
+            "│ │ stic"
         );
 
         assert_eq!(actual, expected);

crates/forge_markdown_stream/src/renderer.rs

@@ -8,7 +8,7 @@ use streamdown_parser::ParseEvent;
 use crate::code::CodeHighlighter;
 use crate::heading::render_heading;
 use crate::inline::{render_inline_content, render_inline_elements};
-use crate::list::{ListState, render_list_item};
+use crate::list::{render_list_item, ListState};
 use crate::style::InlineStyler;
 use crate::table::render_table;
 use crate::theme::Theme;
@@ -255,13 +255,13 @@ impl<W: Write> Renderer<W> {
 
             ParseEvent::BlockquoteLine(text) => {
                 let margin = self.left_margin();
-                let width = self.current_width();
+                let content_width = self.width.saturating_sub(visible_length(&margin));
                 // Parse inline formatting (bold, italic, etc.) in blockquote content
                 let rendered_content = render_inline_content(text, &self.theme);
                 let wrapped = wrap_text_preserving_spaces(
                     &rendered_content,
-                    width.saturating_sub(visible_length(&margin)),
-                    width.saturating_sub(visible_length(&margin)),
+                    content_width,
+                    content_width,
                     &margin,
                     &margin,
                 );