Fix soft-wrapping with fold creases (#28029)

Release Notes:

- Fixed a rendering bug that caused context in the agent to not wrap
properly.

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Zed AI <ai+claude-3.7@zed.dev>

crates/editor/src/editor.rs

@@ -58,7 +58,7 @@ use clock::ReplicaId;
 use collections::{BTreeMap, HashMap, HashSet, VecDeque};
 use convert_case::{Case, Casing};
 use display_map::*;
-pub use display_map::{DisplayPoint, FoldPlaceholder};
+pub use display_map::{ChunkRenderer, ChunkRendererContext, DisplayPoint, FoldPlaceholder};
 use editor_settings::GoToDefinitionFallback;
 pub use editor_settings::{
     CurrentLineHighlight, EditorSettings, HideMouseMode, ScrollBeyondLastLine, SearchSettings,
@@ -15045,6 +15045,15 @@ impl Editor {
         self.active_indent_guides_state.dirty = true;
     }
 
+    pub fn update_fold_widths(
+        &mut self,
+        widths: impl IntoIterator<Item = (FoldId, Pixels)>,
+        cx: &mut Context<Self>,
+    ) -> bool {
+        self.display_map
+            .update(cx, |map, cx| map.update_fold_widths(widths, cx))
+    }
+
     pub fn default_fold_placeholder(&self, cx: &App) -> FoldPlaceholder {
         self.display_map.read(cx).fold_placeholder.clone()
     }