shortcuts: physical-key bindings for AZERTY layouts; Go to Work Area Start/End

Shortcut presets accept Physical+<key> (egui US-position names) so layouts that report the
same logical key for two physical keys (AZERTY's - and )) can bind them separately; physical
bindings win for that press, and a focused panel's binding wins over an application command on
the same chord. ui.key accepts the same notation. Adds time.workAreaStart / time.workAreaEnd.

(cherry picked from commit 209543e9e0ba32f809f9ff333abb8b8ec4125cea)

(cherry picked from commit f8301a9e3e0b60e200e8a233455398741658481e)
(cherry picked from commit 4d002fabf992934e1bb73a0c32bc9f3fd3ae5447)

(cherry picked from commit 5d466c5955ee934d5347c194ec7d15fb5f58bba4)

docs/control-protocol.md

@@ -97,6 +97,13 @@ Points are logical window coordinates. A target is `{id}` (the element's centre;
 | `ui.key` | `{key}`, for example `Space`, `F9`, `Cmd+Z`, `Cmd+Shift+Z`, `PageDown`, `Escape` |
 | `ui.type` | `{text}`: text input into the focused field |
 
+Shortcut presets also accept `Physical+<shortcut>` for a keyboard position, using egui's
+US-position names (for example `Physical+6` and `Physical+Minus` distinguish AZERTY's
+`-` and `)` keys). Physical bindings take precedence over logical bindings for that key
+press. `ui.key` accepts the same notation to test them. Ordinary shortcuts remain layout-aware.
+`time.workAreaStart` and `time.workAreaEnd` navigate to the first and last included work-area
+frames and can be assigned through `shortcuts.set`.
+
 ## Locating things
 
 | Method | Params | Result |