too many warnings: type the Calc sheet slot args as unsigned short

scalc.sdi declares Index as SfxUInt16Item for the Insert, Remove and Name
slots, so a long here hits the "Passing sal_uInt16 in sal_Int32!" fallback.

same fix as:

commit 1fe99b7
Date:   Fri Jul 24 14:17:20 2026 +0000

    too many warnings: type the .uno:Move args as JSON

Signed-off-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Change-Id: I8b6d52e68a15f227f868446cd6d6ab7f10f94d0e
Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/7932
Reviewed-by: Noel Grandin <noel.grandin@collabora.com>
Tested-by: Jenkins CPCI <releng@collaboraoffice.com>

Author: caolanm

browser/src/control/Parts.js

@@ -391,7 +391,7 @@ window.L.Map.include({
 					'value': ''
 				},
 				'Index': {
-					'type': 'long',
+					'type': 'unsigned short',
 					'value': nPos + 1
 				}
 			};
@@ -455,7 +455,7 @@ window.L.Map.include({
 			this._docLayer._sheetSwitch.updateOnSheetDeleted(nPos);
 			var command = {
 				'Index': {
-					'type': 'long',
+					'type': 'unsigned short',
 					'value': nPos + 1
 				}
 			};
@@ -506,7 +506,7 @@ window.L.Map.include({
 					'value': name
 				},
 				'Index': {
-					'type': 'long',
+					'type': 'unsigned short',
 					'value': nPos + 1
 				}
 			};