Flip Elsewhen between Fahrenheit and Celsius with Alt+T (#13450)

* Flip Elsewhen between Fahrenheit and Celsius with Shift+T

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Flip Elsewhen's temperature units with Alt+T instead of Shift+T

PanelKeyCatcher's textKey now carries the held modifiers, which is how the
panel tells Alt+T from T. Existing handlers take only the text and are
unaffected.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

shell/Ui/PanelKeyCatcher.qml

@@ -14,7 +14,7 @@ import QtQuick
 //       onActivateRequested: root.activateCursor()
 //       onCloseRequested: root.close()
 //       onDeleteRequested: root.deleteSelected()
-//       onTextKey: function(t) { if (t === "r") root.refresh() }
+//       onTextKey: function(t, modifiers) { if (t === "r") root.refresh() }
 //
 //       Column { ... panel content ... }
 //     }
@@ -41,7 +41,8 @@ Item {
   signal closeRequested()
   signal deleteRequested()
   signal tabRequested(int direction)
-  signal textKey(string text)
+  // The held modifiers ride along, so a panel can tell Alt+T from T.
+  signal textKey(string text, int modifiers)
 
   focus: true
   Keys.priority: Keys.BeforeItem
@@ -79,7 +80,7 @@ Item {
       deleteRequested(); event.accepted = true; return
     }
     if (event.text && event.text.length === 1) {
-      textKey(event.text)
+      textKey(event.text, event.modifiers)
     }
   }
 }

shell/plugins/panels/elsewhen/Panel.qml

@@ -758,10 +758,12 @@ Panel {
       }
       onTabRequested: function(direction) { root.switchPanel(direction) }
       // "+" searches in either view; "j" jumps on the globe, "a" adds on the list.
-      // "t" flips 24-hour and AM/PM time, like clicking a row's time.
-      onTextKey: function(text) {
+      // "t" flips 24-hour and AM/PM time, like clicking a row's time, and Alt+T
+      // flips Fahrenheit and Celsius, like clicking a temperature.
+      onTextKey: function(text, modifiers) {
         var key = text.toLowerCase()
         if (key === "r") root.refresh()
+        else if (key === "t" && (modifiers & Qt.AltModifier)) root.toggleUnits()
         else if (key === "t") root.toggleHour24()
         else if (root.globeMode && (key === "+" || key === "j")) {
           if (globeLoader.item) globeLoader.item.startJump()