fix: insert mail template at caret in replies instead of prepending #539

components/email/email-composer.tsx

@@ -1143,7 +1143,30 @@ export function EmailComposer({
         setShowBcc(true);
       }
     } else {
-      setBody((prev) => bodyContent + (plainTextMode ? '\n' : '') + prev);
+      // Reply/forward: insert the template at the caret so it lands after any
+      // text the user has already typed, instead of always prepending it (#539).
+      if (plainTextMode) {
+        const textarea = bodyRef.current;
+        if (textarea) {
+          const start = textarea.selectionStart ?? textarea.value.length;
+          const end = textarea.selectionEnd ?? start;
+          setBody((prev) => prev.slice(0, start) + bodyContent + prev.slice(end));
+          // Restore the caret just past the inserted text once React re-renders.
+          requestAnimationFrame(() => {
+            const caret = start + bodyContent.length;
+            textarea.focus();
+            textarea.setSelectionRange(caret, caret);
+          });
+        } else {
+          setBody((prev) => bodyContent + '\n' + prev);
+        }
+      } else if (editorRef.current) {
+        // insertContent lands at the editor's current selection; onUpdate
+        // propagates the resulting HTML back through onChange → setBody.
+        editorRef.current.chain().focus().insertContent(bodyContent).run();
+      } else {
+        setBody((prev) => bodyContent + prev);
+      }
     }
 
     if (template.identityId) {