fix(org-noter): auto-insert NOTER_DOCUMENT property, never prompt for document path

config.el

@@ -1249,28 +1249,48 @@ Otherwise: runs interactive ement-connect, then opens rooms after sync."
         org-noter-insert-note-no-questions nil
         org-noter-use-indirect-buffer nil))
 
-;; Smart launcher: always start org-noter from the PDF window,
-;; regardless of which window is currently selected.
-;; Fixes: calling SPC o n from an org buffer while PDF is visible in split.
-(defun my/org-noter-smart ()
-  "Start org-noter, auto-selecting the PDF window in the current frame.
-If current buffer is pdf-view-mode: start normally.
-If another visible window shows a PDF: switch to it first, then start.
-Otherwise: run standard org-noter (interactive, prompts for document)."
+;; Smart org-noter launcher: works seamlessly from a PDF buffer.
+;; Ensures the notes file exists with NOTER_DOCUMENT property before starting,
+;; so org-noter never prompts "No document property found".
+(defun my/org-noter-start ()
+  "Start org-noter for the PDF visible in the current frame.
+Auto-creates or updates the notes file with the NOTER_DOCUMENT property."
   (interactive)
-  (let ((pdf-win (cl-find-if
-                  (lambda (w)
-                    (with-current-buffer (window-buffer w)
-                      (derived-mode-p 'pdf-view-mode)))
-                  (window-list (selected-frame)))))
-    (if pdf-win
+  (let* ((pdf-win (if (derived-mode-p 'pdf-view-mode)
+                      (selected-window)
+                    (cl-find-if
+                     (lambda (w)
+                       (with-current-buffer (window-buffer w)
+                         (derived-mode-p 'pdf-view-mode)))
+                     (window-list (selected-frame)))))
+         (pdf-path (when pdf-win
+                     (with-current-buffer (window-buffer pdf-win)
+                       (buffer-file-name)))))
+    (if (not pdf-path)
+        ;; No PDF open — fall back to standard org-noter
+        (org-noter)
+      ;; Build notes file path from PDF basename + notes search path
+      (let* ((base (file-name-base pdf-path))
+             (notes-dir (car org-noter-notes-search-path))
+             (notes-file (expand-file-name (concat base ".org") notes-dir)))
+        (make-directory notes-dir t)
+        ;; Ensure notes file has NOTER_DOCUMENT property
+        (with-current-buffer (find-file-noselect notes-file)
+          (unless (save-excursion
+                    (goto-char (point-min))
+                    (re-search-forward ":NOTER_DOCUMENT:" nil t))
+            ;; No NOTER_DOCUMENT found — insert a top-level heading with property
+            (goto-char (point-min))
+            (insert (format "* Notes: %s\n:PROPERTIES:\n:NOTER_DOCUMENT: %s\n:END:\n\n"
+                            base pdf-path))
+            (save-buffer)))
+        ;; Start org-noter from the PDF window
         (with-selected-window pdf-win
-          (org-noter))
-      (org-noter))))
+          (org-noter))))))
 
 (map! :leader
       (:prefix ("o" . "open")
-       :desc "org-noter (smart)"     "n" #'my/org-noter-smart
+       :desc "org-noter"             "n" #'my/org-noter-start
        :desc "org-noter insert note" "N" #'org-noter-insert-note))