web: a row's menu is the tree's own and speaks only of that row, and only the row being read admits to it

The menu that hangs off a folder is a menu read mid-scan, with the eye still
moving down the column, and it was drawn to the measure of a page rather than of
a list: a box wide enough to be a destination, type the size of a heading. A
catalogue's own context menu is a thing passed over on the way somewhere else —
it is sized to its words and to the row it hangs off, and the reader's eye steps
across it without stopping. The type comes down a point, the rows tighten to the
tree's own measure, and the frame around them thickens to a radius the rows
themselves use. The clamp that keeps it in the window follows the smaller box,
so a menu opened near the right or the bottom edge no longer floats an inch off
the pointer for room it does not use.

A row that is being read has exactly one thing to be asked of it — that it stop
— where a row at rest has the reading that brings it up to date. The menu said
RESCAN either way, greyed while a scan was up, which is a command offered and
refused in the same breath. The two never both apply, so the menu now carries
the one the row is actually in: a roll being read offers STOP SCAN and stops
that roll; a roll at rest offers UPDATE... and reads it again. A row with
folders under it grows a third thing — a fold that closes the branch and not
merely the row, because a reader who is done with a tree means the whole of it
shut, and closing only the row they happened to point at leaves the children
standing open underneath it.

The last is a matter of what a row is allowed to claim. Every row of a roll
spanning the tree spun while that roll was being read, so a reader looking at a
tree of a hundred folders saw a hundred rows each insisting it was the one being
read, when the reading had been pointed at one of them. A row now says it is
being read only when it is the row the reading was kept to — the folder it was
pointed at, which for a whole roll is the roll's own row. A tree that says all
of itself is busy when one branch of it is says nothing a reader can trust.

docker/frontend/src/i18n/en.ts

@@ -241,11 +241,12 @@ export const en: Dict = {
   'lib.stop': 'STOP SCAN',
   'lib.rename': 'RENAME FOLDER',
   'lib.renameAsk': 'Name shown for this folder (the folder on the disk is not renamed):',
-  'lib.rescan': 'RESCAN',
+  'lib.update': 'UPDATE...',
   'lib.remove': 'REMOVE',
   'lib.reconnect': 'GRANT ACCESS AGAIN',
-  'lib.nodeHint': 'Right-click to rename, rescan or remove the folder.',
+  'lib.nodeHint': 'Right-click to rename, update, collapse or remove the folder.',
   'lib.collapseAll': 'COLLAPSE ALL',
+  'lib.collapse': 'COLLAPSE',
   'lib.colHint': 'Right-click the empty part of this column to add a folder.',
   'lib.colWidth': 'Drag to set the width of the folder column (arrow keys when focused)',
   'lib.viewPreview': 'SINGLE',

docker/frontend/src/i18n/vi.ts

@@ -253,11 +253,12 @@ export const vi = {
   'lib.stop': 'DỪNG QUÉT',
   'lib.rename': 'ĐỔI TÊN THƯ MỤC',
   'lib.renameAsk': 'Tên hiển thị cho thư mục này (thư mục trên máy không bị đổi tên):',
-  'lib.rescan': 'QUÉT LẠI',
+  'lib.update': 'CẬP NHẬT...',
   'lib.remove': 'BỎ',
   'lib.reconnect': 'CẤP LẠI QUYỀN',
-  'lib.nodeHint': 'Chuột phải để đổi tên, quét lại hay bỏ thư mục.',
+  'lib.nodeHint': 'Chuột phải để đổi tên, cập nhật, thu gọn hay bỏ thư mục.',
   'lib.collapseAll': 'THU GỌN TẤT CẢ',
+  'lib.collapse': 'THU GỌN',
   'lib.colHint': 'Chuột phải vào vùng trống của cột này để thêm thư mục.',
   'lib.colWidth': 'Kéo để chỉnh độ rộng cột thư mục (mũi tên trái/phải khi đang chọn)',
   'lib.viewPreview': 'MỘT ẢNH',