v0.4.0

What's New

• File Manager — Full file manager accessible from the Android app: browse with metadata (size, date, file type), create files/directories, rename/move, and delete with confirmation dialogs.
• Text File Editor — View and edit text files with a monospace editor, line number gutter, save with .bak backup, and discard-changes safety dialog.
• Agent Update UI — ServerDetailScreen now shows agent version and a one-tap Update button when a new release is available.

New API Endpoints

Method	Path	Description
GET	/api/v1/fs/read?path=	Read text file contents (1MB limit, binary detection)
PUT	/api/v1/fs/write	Write file with .bak backup
POST	/api/v1/fs/mkdir	Create directory
POST	/api/v1/fs/rename	Rename/move file or directory
DELETE	/api/v1/fs/delete?path=	Delete file or directory

Enhanced

• GET /api/v1/fs/browse now returns size, modified_at, and file_type for each entry
• Browse skips .bak backup files
• File type icons in the Android file browser (code, config, script, image, etc.)

Fixed

• Self-update now works on servers where the binary directory is not writable by the service user (e.g. /usr/local/bin owned by root). Downloads to system temp dir with cross-filesystem copy fallback.

Safety

• Binary file detection (null-byte check, returns 415)
• 1MB size limit for read/write
• System directory deletion protection (post-symlink-resolution)
• Path traversal prevention on the client side