- Add fetchAttachmentsForNotes() batch helper mirroring fetchTagsForNotes pattern
- Include attachments in all note API responses (list, single, sync)
- Fix ImageUpload.svelte URL bug (path-based → query param)
- Add client-side image optimization (resize, compress, WebP conversion)
- Add thumbnailPath column to attachments schema with migration
- Update saveAttachment/deleteAttachment for thumbnail file handling
- Update attachment API: accept thumbnail in POST, serve via &thumb=1 in GET
- Add Cache-Control immutable header for served attachments
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
