The decoded view is a read-only field table, so pressing Edit there did
nothing (no readonly inputs to strip) and Save found nothing to write.
- Remove the redundant Read button: the Raw/Decoded pills already read
the file, so they become explicit read actions — Read raw / Read
decoded (Читать сырые данные / Декодировать). They are buttons now
so the server/card availability model disables them like the old Read
button did.
- Edit raw (Редактировать сырые данные) always edits the hex view: from
decoded (or with no content loaded yet) it switches back to raw and
reads the file first; the decoded view stays read-only.
- Save/Cancel moved next to Edit raw (right-aligned group); the pills
are inert and dimmed while editing (mode switching would discard
unsaved changes).
- Tests: frontend/tests/fs_edit.test.js (skipRead, edit guard, decoded
auto-switch ordering, read failure abort, cancel/reset); help EN/RU.
