Implement unified drag system that supports both internal node moves
and external file uploads with consistent UI feedback. Uses native
HTML5 drag API with shared visual states (isDragOver, isBlinking,
DragActionTooltip showing 'Move to' or 'Upload to').
Move searchTerm from props drilling to zustand store for cleaner
architecture. Remove unnecessary controlled/uncontrolled pattern
and unused debounce logic since search is pure frontend filtering.
- Add fileTreeSearchTerm state to file-tree-slice
- Remove useState and props from main.tsx
- Simplify sidebar-search-add.tsx to read/write store directly
- Add empty state UI with reset filter button
Remove the Office file placeholder that only showed "Preview will be
supported in a future update" without any download option. Office files
(pdf, doc, docx, xls, xlsx, ppt, pptx) now fall through to the generic
"unsupported file" handler which provides a download button.
Removed:
- OfficeFilePlaceholder component
- isOfficeFile function and OFFICE_EXTENSIONS constant
- isOffice flag from useFileTypeInfo hook
- i18n keys for officePlaceholder
This simplifies the file type handling to just three categories:
- Editable: markdown, code, text files → editor
- Previewable: image, video files → media preview
- Everything else: download button
Change useSkillFileData to use isEditable instead of isMediaFile:
- Editable files (markdown, code, text) fetch file content for editing
- Non-editable files (image, video, office, unsupported) fetch download URL
This fixes the download button for unsupported files which was incorrectly
using file content (UTF-8 decoded garbage) instead of the presigned URL.
Extract business logic into dedicated hooks to reduce component complexity:
- useFileTypeInfo: file type detection (markdown, code, image, video, etc.)
- useSkillFileData: data fetching with conditional API calls
- useSkillFileSave: save logic with Ctrl+S keyboard shortcut
Also fix Vercel best practice: use ternary instead of && for conditional rendering.
Previously, media files were fetched via getFileContent API which decodes
binary data as UTF-8, resulting in corrupted strings that cannot be used
as img/video src. Now media files use getFileDownloadUrl API to get a
presigned URL, enabling proper preview of images and videos of any size.
