Migrate frontend to Svelte 5 runes semantics

frontend/src/components/RepositoryDashboardGrid.svelte

@@ -11,7 +11,7 @@
 
 <script lang="ts">
   // [SECTION: IMPORTS]
-  import { createEventDispatcher, untrack } from "svelte";
+  import { untrack } from "svelte";
   import type { DashboardMetadata } from "../types/dashboard";
   import { t } from "../lib/i18n";
   import { Button, Input } from "../lib/ui";
@@ -96,10 +96,6 @@
   );
   // [/SECTION]
 
-  // [SECTION: EVENTS]
-  const dispatch = createEventDispatcher<{ selectionChanged: number[] }>();
-  // [/SECTION]
-
   // [DEF:handleSort:Function]
   // @PURPOSE: Toggles sort direction or changes sort column.
   // @PRE: column name is provided.
@@ -117,7 +113,7 @@
   // [DEF:handleSelectionChange:Function]
   // @PURPOSE: Handles individual checkbox changes.
   // @PRE: dashboard ID and checked status provided.
-  // @POST: selectedIds array updated and selectionChanged event dispatched.
+  // @POST: selectedIds array updated.
   function handleSelectionChange(id: number, checked: boolean) {
     let newSelected = [...selectedIds];
     if (checked) {
@@ -126,14 +122,13 @@
       newSelected = newSelected.filter((sid) => sid !== id);
     }
     selectedIds = newSelected;
-    dispatch("selectionChanged", newSelected);
   }
   // [/DEF:handleSelectionChange:Function]
 
   // [DEF:handleSelectAll:Function]
   // @PURPOSE: Handles select all checkbox.
   // @PRE: checked status provided.
-  // @POST: selectedIds array updated for all paginated items and event dispatched.
+  // @POST: selectedIds array updated for all paginated items.
   function handleSelectAll(checked: boolean) {
     let newSelected = [...selectedIds];
     if (checked) {
@@ -146,7 +141,6 @@
       });
     }
     selectedIds = newSelected;
-    dispatch("selectionChanged", newSelected);
   }
   // [/DEF:handleSelectAll:Function]
 
@@ -379,7 +373,6 @@
     );
     dashboards = dashboards.filter((dashboard) => !idsToDelete.includes(dashboard.id));
     selectedIds = [];
-    dispatch("selectionChanged", []);
   }
   // [/DEF:handleBulkDelete:Function]