Refactor event and fight repositories to use numeric IDs for groups; update datetime picker input handling; add new generator components for event fights and group phases.

src/components/moderator/pages/generators/FightsGenerator.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+    import type { ExtendedEvent } from "@components/types/event";
+    import { Tabs, TabsList, TabsTrigger, TabsContent } from "@components/ui/tabs";
+    import GroupPhaseGenerator from "./gens/group/GroupPhaseGenerator.svelte";
+    let {
+        data,
+    }: {
+        data: ExtendedEvent;
+    } = $props();
+</script>
+
+<div class="m-4">
+    <Tabs value="group">
+        <TabsList class="mb-4">
+            <TabsTrigger value="group">Gruppenphase</TabsTrigger>
+            <TabsTrigger value="ko">K.O. Phase</TabsTrigger>
+        </TabsList>
+        <TabsContent value="group">
+            <GroupPhaseGenerator {data} />
+        </TabsContent>
+    </Tabs>
+</div>