- `/upload` is now manga-only with optional N initial chapters
staged inline.
- Additional chapters from a new `/manga/[id]/upload-chapter` route,
reached via an "Upload chapter" button on the manga page.
- New `ChapterPagesEditor` component: thumbnails next to each row,
click-to-preview-modal, drag-drop + reorder.
- Pages renamed to `page-NNN.<ext>` before multipart submission;
original filenames shown as dimmed reference text during upload
and dropped on submit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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