refactor: unify FilePond edit previews + clean upload UI and shared fragments

* Move shared `fichiers-fragment.php` from `partage/` to `templates/partials/form/`
  and update all include/require references
* `.gitignore`: exclude SQLite WAL/SHM journal files
* FilePond UI:

  * change uploaded file block border state from yellow to green
  * restyle image previews to use site light-theme colors
* Edit mode:

  * remove custom existing-file preview list implementation
  * preload existing files directly into FilePond pools
  * include `cover` and `note_intention` assets in FilePond-managed state
* Remove obsolete upload progress bar UI and related JS includes
* Remove deprecated `Écriture` + `Image` format types from upload flow/configuration

TODO.md

@@ -1,3 +1,15 @@
+# Current tasks
+
+- [x] .gitignore / .ignore: exclude *.db-wal and *.db-shm
+- [x] CSS: FilePond pool file block border yellow → green on upload complete
+- [x] Move shared fichiers-fragment.php from partage/ to templates/partials/form/ and update all links
+- [x] Remove Écriture and Image format types (migration 035 + schema seed + query filter)
+- [x] FilePond image previews: use site light colors (--bg-secondary, --text-secondary, --accent-green, --error)
+- [x] Edit mode: remove custom file preview list above FilePond pools; use FilePond pools for preexisting files
+- [x] Cover + note_intention: add data-existing-files to their FilePond inputs (per-queue-type JSON arrays)
+- [x] Remove upload-progress bar at bottom (FilePond handles its own progress)
+- [x] Remove upload-progress.js from edit/add/partage page extraJs arrays
+
 # FilePond Refactor — Merge video/audio into TFE pool
 
 - [x] A. `fichiers-fragment.php` — Remove separate video/audio pools, merge into TFE; include PeerTube in data-existing-files