feat(sftp): drag and drop, folder transfers and file dates

CHANGELOG.md

@@ -12,6 +12,9 @@ Versions follow [Semantic Versioning](https://semver.org/).
 ### Features
 - **Settings shows the installed version.** On Windows and Linux the desktop app showed its version nowhere. Settings now ends with it, and it can be copied into a bug report.
 - **Group and arrange hosts on the dashboard.** With many hosts the dashboard was one long grid in config order. Both apps now group it with `g`: each host goes under its first tag, untagged hosts last. In the desktop app, View options also sorts the cards by name or status, sections fold from their header, and a card's handle drags it, or moves it with the arrow keys, into an order of your own that is kept across restarts.
+- **Drag files and folders between the SFTP panes, or onto the remote pane from your file manager.** In the desktop app, dragging a row to the other pane uploads or downloads it into the folder row it is dropped on, or else into the folder on show, and dragging a ticked row takes every ticked row along. Files and folders dropped from Explorer, Finder or a Linux file manager onto the remote pane upload to it. Escape cancels a drag.
+- **Both apps transfer whole folders.** Upload and Download in the desktop app, and copy and paste in the terminal app, take a folder with everything in it, merge it into a folder of the same name and replace files that clash, and the desktop app asks first when the folder on show already has those names. Files and folders keep their permission bits, so scripts stay executable, and a copy stays writable for you so the next transfer can replace it; symbolic links and special files are skipped, and the transfer ends by saying how many items were skipped or failed and why the first one was. Cancel in the desktop app's progress strip, closing its tab, or Esc in the terminal app stops a transfer and removes the file it was part way through.
+- **The file panes show when each file was last changed.** The desktop app's panes gain a Modified column, with the full date and time on hover, once the window is wide enough. The terminal app's file manager shows the time at the end of each row when its panel is wide enough.
 
 ### Bug Fixes
 - **Security: a server that offers a host key of another type than the one saved for it is refused.** OmnySSH compared the offered key only with saved keys of the same type. A host saved with its Ed25519 key that suddenly offered only an RSA or ECDSA key was therefore taken for a new host: the key was saved and the login went ahead, password included, and the dashboard did this in the background without anyone connecting. Someone intercepting the connection could get past the saved key this way. Like `ssh`, OmnySSH now refuses any key that matches none of those saved for the host, whatever its type, and says which type is saved. A server that really dropped the type of key it was saved with needs its old key removed once, as `ssh` also asks.
@@ -27,6 +30,9 @@ Versions follow [Semantic Versioning](https://semver.org/).
 - **A snippet with the same tag twice no longer empties the Snippets screen.** Tags typed as `db, db` in a snippet form, or written so into `snippets.toml`, left the desktop app's Snippets screen blank, so the snippet could not even be opened to fix it. The Run dialog broke the same way when two hosts share a name, as two `Host` blocks with one name in `~/.ssh/config` give. It now lists that name once, for the host a run goes to. The host picker and the command palette listed such a name twice, and either row opened the first host; they now list it once too.
 - **Sizes in the terminal app's file manager stay in their column next to wide file names.** A name with Chinese, Japanese or Korean characters or emoji, which take two cells each, pushed its size past the panel's edge, so a 14-byte file read `1`. Names are now padded and cut by the cells they take.
 - **Closing the host picker with Esc gives the keyboard back to the terminal.** In the desktop app, clicking SFTP or Terminal in the sidebar over an open terminal and then pressing Esc left the keyboard on the sidebar, so typing reached nothing until you clicked in the terminal. The command palette's sidebar button had the same problem, and so did clicking the terminal's own tab. A terminal that finishes connecting while the palette is open, or comes into view just as a passphrase prompt opens, no longer takes the keyboard from it.
+- **Pasting a folder in the terminal app copies it instead of leaving an empty file.** The file manager handed a folder to the transfer as if it were a file, so the paste failed after creating an empty file of that name on the other side.
+- **A paste or delete of more than 64 items in the terminal app handles them all.** They went to the SFTP queue at once, and whatever did not fit in its 64 places was dropped without a word while the app kept waiting for it. They now go one at a time.
+- **The terminal app no longer crashes when a file grows while it is copied.** A log still being written to could end up larger than when its transfer started, which took the progress bar past 100% and brought the app down.
 
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README.md

@@ -55,7 +55,7 @@ Cards for every host with CPU, RAM and disk bars, uptime, OS version, top proces
 Full PTY sessions in tabs. Open as many servers as you need, switch between them from the sidebar, and keep them running while you work in the dashboard.
 
 ### Two panel SFTP
-Local on the left, remote on the right. Tick the files you want and move them across, watch the progress bar, select many at once. Nobody remembers `scp -r` syntax anyway.
+Local on the left, remote on the right. Tick the files and folders you want and move them across, or just drag them from one side to the other, or straight from your file manager onto the server. Watch the progress bar, select many at once, see when each file was last changed. Nobody remembers `scp -r` syntax anyway.
 
 ### Snippets
 Save the commands you paste every week. Pick a snippet, tick the hosts to send it to, and it runs on all of them at once. Snippets take parameters, so `sudo systemctl restart {{service}}` asks you for the name.