feat(central-ui): enlarge script modal; tab the Shared Script form

Script editor modal (TemplateEdit): the tabbed Trigger/Code/Parameters/
Return content is substantial, so the dialog now fills most of the
viewport — a .script-editor-modal class (96vw wide, ~full height) replaces
modal-xl, paired with modal-dialog-scrollable so the body scrolls.

Shared Script create/edit form (SharedScriptForm): Code, Parameters, and
Return type move from stacked sections into a tab strip, matching the
template script modal. Panels toggle via display:none so the Monaco editor
and JSONJoy island stay mounted across tab switches; Code is the default
tab. Name stays above the tabs.

Markup/CSS only — no logic change. CentralUI suite 316 green; both
verified in the browser.

src/ScadaLink.CentralUI/wwwroot/css/site.css

@@ -86,3 +86,16 @@
     background: var(--bs-white);
     border-radius: 0.5rem;
 }
+
+/* Script editor modal — the tabbed Trigger/Code/Parameters/Return content is
+   substantial, so the dialog fills most of the viewport. Pairs with
+   .modal-dialog-scrollable so the body scrolls within the fixed height. */
+.modal-dialog.script-editor-modal {
+    max-width: 96vw;
+    width: 96vw;
+    height: calc(100vh - 2rem);
+}
+
+.modal-dialog.script-editor-modal .modal-content {
+    height: 100%;
+}