Fixed punctuation error

crates/analyzer/src/lib.rs

@@ -111,9 +111,22 @@ fn inject_marker_at(source: &str, line: u32, character: u32, marker: &str) -> Op
         s.push_str(&source[..token_start]);
         s.push_str(marker);
         s.push_str(&source[token_end..]);
-        Some(s)
-    } else {
-        // Cursor is on whitespace / punctuation — inject as standalone expression.
+        return Some(s);
+    }
+
+    // Not on an identifier.  If the cursor is on a `.` treat it as a field-access
+    // and inject the marker as an identifier right after the dot.
+    if after.starts_with('.') {
+        let dot_end = offset + '.'.
+            len_utf8();
+        let mut s = String::with_capacity(source.len() + marker.len() + 4);
+        s.push_str(&source[..dot_end]);
+        s.push_str(marker);
+        s.push_str(&source[dot_end..]);
+        return Some(s);
+    }
+
+    // Whitespace / other punctuation — inject as standalone expression.
     let mut s = String::with_capacity(source.len() + marker.len() + 4);
     s.push_str(&source[..offset]);
     s.push(' ');
@@ -122,7 +135,7 @@ fn inject_marker_at(source: &str, line: u32, character: u32, marker: &str) -> Op
     s.push_str(&source[offset..]);
     Some(s)
 }
-}
+
 
 fn find_marker_position(content: &str, marker: &str) -> Option<Position> {
     let idx = content.find(marker)?;