feat: Refactor event management components and introduce EventModel for better state handling

src/components/moderator/components/GroupSelector.svelte

@@ -0,0 +1,103 @@
+<script lang="ts">
+    import type { GroupUpdateEdit, ResponseGroups, SWEvent } from "@type/event";
+    import { Popover, PopoverContent, PopoverTrigger } from "@components/ui/popover";
+    import { CommandInput, CommandList, CommandEmpty, CommandGroup, CommandItem, Command } from "@components/ui/command";
+    import { ChevronsUpDownIcon, PlusIcon, CheckIcon, MinusIcon } from "lucide-svelte";
+    import { Button } from "@components/ui/button";
+    import { cn } from "@components/utils";
+    import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "@components/ui/dialog";
+    import GroupEdit from "./GroupEdit.svelte";
+    import { eventRepo } from "@components/repo/event";
+
+    let {
+        event,
+        groups = $bindable(),
+        value = $bindable(),
+    }: {
+        event: SWEvent;
+        groups: ResponseGroups[];
+        value: number | null;
+    } = $props();
+
+    let selectedGroup = $derived(groups.find((group) => group.id === value));
+
+    let createOpen = $state(false);
+    let groupSelectOpen = $state(false);
+
+    async function handleGroupSave(group: GroupUpdateEdit) {
+        let g = await $eventRepo.createGroup(event.id.toString(), group);
+        groups.push(g);
+        value = g.id;
+        createOpen = false;
+        groupSelectOpen = false;
+    }
+</script>
+
+<Dialog bind:open={createOpen}>
+    <Popover bind:open={groupSelectOpen}>
+        <PopoverTrigger>
+            {#snippet child({ props })}
+                <Button id="fight-group" variant="outline" class="justify-between" {...props} role="combobox">
+                    {selectedGroup?.name || "Keine Gruppe"}
+                    <ChevronsUpDownIcon class="ml-2 size-4 shrink-0 opacity-50" />
+                </Button>
+            {/snippet}
+        </PopoverTrigger>
+        <PopoverContent class="p-0">
+            <Command>
+                <CommandInput placeholder="Gruppe suchen..." />
+                <CommandList>
+                    <CommandGroup>
+                        <CommandItem value={"new"} onSelect={() => (createOpen = true)}>
+                            <PlusIcon class={"mr-2 size-4"} />
+                            Neue Gruppe
+                        </CommandItem>
+
+                        <CommandGroup heading="Gruppen">
+                            <CommandItem
+                                value={"none"}
+                                onSelect={() => {
+                                    value = null;
+                                    groupSelectOpen = false;
+                                }}
+                            >
+                                {#if value === null}
+                                    <CheckIcon class={"mr-2 size-4"} />
+                                {:else}
+                                    <MinusIcon class={"mr-2 size-4"} />
+                                {/if}
+                                Keine Gruppe
+                            </CommandItem>
+
+                            {#each groups as group}
+                                <CommandItem
+                                    value={group.id.toString()}
+                                    onSelect={() => {
+                                        value = group.id;
+                                        groupSelectOpen = false;
+                                    }}
+                                >
+                                    <CheckIcon class={cn("mr-2 size-4", value !== group.id && "text-transparent")} />
+                                    {group.name}
+                                </CommandItem>
+                            {/each}
+                        </CommandGroup>
+                    </CommandGroup>
+                </CommandList>
+            </Command>
+        </PopoverContent>
+    </Popover>
+    <DialogContent>
+        <DialogHeader>
+            <DialogTitle>Neue Gruppe erstellen</DialogTitle>
+            <DialogDescription>Hier kannst du eine neue Gruppe erstellen</DialogDescription>
+        </DialogHeader>
+        <GroupEdit group={null} onSave={handleGroupSave}>
+            {#snippet actions(dirty, submit)}
+                <DialogFooter>
+                    <Button disabled={!dirty} onclick={submit}>Speichern</Button>
+                </DialogFooter>
+            {/snippet}
+        </GroupEdit>
+    </DialogContent>
+</Dialog>