fix(mu4e): search-based subject cursor + zT thread toggle binding

config.el

@@ -649,19 +649,25 @@ and optional priority indicator [#A]."
           ("/personal/Archive" . ?a)))
   ;; Cursor on subject column after j/k navigation
   (defun my/mu4e-goto-subject (&rest _)
-    "Move cursor to the subject column in mu4e headers.
-Accounts for mu4e's 1-char mark indicator at the start of each line."
+    "Move cursor to the start of the subject text in a mu4e headers line.
+Uses the actual subject string from the message rather than column arithmetic,
+which is unreliable with unicode flags and thread-prefix strings."
     (when (derived-mode-p 'mu4e-headers-mode)
-      (beginning-of-line)
-      (let ((offset 1)) ; 1 = mu4e mark indicator (space or *)
-        (catch 'found
-          (dolist (field mu4e-headers-fields)
-            (if (eq (car field) :subject)
-                (throw 'found nil)
-              (setq offset (+ offset (or (cdr field) 0) 1)))))
-        (forward-char (min offset (- (line-end-position) (point)))))))
+      (let* ((msg (mu4e-message-at-point t))
+             (subject (when msg (mu4e-message-field msg :subject))))
+        (when (and subject (> (length subject) 0))
+          (beginning-of-line)
+          ;; Search for up to the first 10 chars of the subject on this line.
+          ;; Avoids false matches while tolerating mu4e truncation.
+          (let ((needle (substring subject 0 (min 10 (length subject)))))
+            (when (search-forward needle (line-end-position) t)
+              (goto-char (match-beginning 0))))))))
   (advice-add 'mu4e-headers-next :after #'my/mu4e-goto-subject)
-  (advice-add 'mu4e-headers-prev :after #'my/mu4e-goto-subject))
+  (advice-add 'mu4e-headers-prev :after #'my/mu4e-goto-subject)
+
+  ;; zT = toggle thread view on/off (T alone marks thread for bulk action)
+  (evil-define-key 'normal mu4e-headers-mode-map
+    (kbd "zT") #'mu4e-headers-toggle-threading))
 
 (after! mu4e
   (setq sendmail-program                  "msmtp"