feat(export): route all exports to ~/exports/<type>/, cleanup LaTeX aux files

- my/org-export-directory: returns ~/exports/<ext>/, creates dir if needed
- my/org-export-output-file-name: advice on org-export-output-file-name
  routes .pdf/.html/.odt etc to ~/exports/pdf/ ~/exports/html/ etc
  .tex (intermediate for PDF) routed to same ~/exports/pdf/
- org-latex-remove-logfiles t + extended logfiles-extensions list
  covers all latexmk outputs: bbl, fdb_latexmk, fls, synctex.gz, run.xml...

config.el

@@ -389,6 +389,32 @@ Bound to cmd+v in org-mode and markdown-mode."
   (setq org-latex-pdf-process
         '("latexmk -f -pdf -%latex -interaction=nonstopmode -output-directory=%o %f")))
 
+;;; LaTeX aux file cleanup after export
+;; org-latex-remove-logfiles t is the default; extend the list to cover all
+;; latexmk output files (bbl, fdb_latexmk, fls, synctex.gz, run.xml, etc.)
+(with-eval-after-load 'ox-latex
+  (setq org-latex-remove-logfiles t
+        org-latex-logfiles-extensions
+        '("aux" "bbl" "bcf" "blg" "fdb_latexmk" "fls" "idx" "log"
+          "nav" "out" "ptc" "run.xml" "snm" "synctex.gz" "toc" "vrb" "xdv")))
+
+;;; Export directory routing
+;; All exports go to ~/exports/<type>/  (created automatically if absent).
+;; .tex is intermediate for PDF export -- both routed to exports/pdf/.
+(defun my/org-export-directory (extension)
+  "Return ~/exports/<type>/ directory for file EXTENSION, creating it if needed."
+  (let* ((ext (downcase (string-trim-left extension "\\.")))
+         (subdir (if (string= ext "tex") "pdf" ext))
+         (dir (expand-file-name (concat "exports/" subdir "/") "~")))
+    (make-directory dir t)
+    dir))
+
+(defun my/org-export-output-file-name (orig extension &optional subtreep pub-dir)
+  "Route org exports to ~/exports/<type>/ unless pub-dir is already set."
+  (funcall orig extension subtreep (or pub-dir (my/org-export-directory extension))))
+
+(advice-add 'org-export-output-file-name :around #'my/org-export-output-file-name)
+
 
 ;;; ============================================================
 ;;; ORG MODE — CUSTOM BEHAVIOR