feat: 添加通用确认对话框组件及状态管理

src/lib/components/ConfirmDialog.svelte

@@ -0,0 +1,142 @@
+<script lang="ts">
+	import { confirmState } from '$lib/stores/confirm.svelte';
+	import { fade, scale } from 'svelte/transition';
+	import { onMount, onDestroy } from 'svelte';
+
+	// Handle escape key to cancel
+	function handleKeydown(e: KeyboardEvent) {
+		if (confirmState.isOpen && e.key === 'Escape') {
+			confirmState.cancel();
+		}
+	}
+
+	onMount(() => {
+		window.addEventListener('keydown', handleKeydown);
+	});
+
+	onDestroy(() => {
+		if (typeof window !== 'undefined') {
+			window.removeEventListener('keydown', handleKeydown);
+		}
+	});
+</script>
+
+{#if confirmState.isOpen}
+	<!-- svelte-ignore a11y_click_events_have_key_events -->
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<div
+		class="confirm-backdrop"
+		transition:fade={{ duration: 150 }}
+		onclick={(e) => {
+			if (e.target === e.currentTarget) confirmState.cancel();
+		}}
+	>
+		<div
+			class="confirm-dialog"
+			transition:scale={{ duration: 150, start: 0.95 }}
+			role="dialog"
+			aria-modal="true"
+			tabindex="-1"
+		>
+			<div class="confirm-content">
+				<p>{confirmState.message}</p>
+			</div>
+			<div class="confirm-actions">
+				<button class="btn btn-secondary" onclick={() => confirmState.cancel()}> 取消 </button>
+				<button class="btn btn-danger" onclick={() => confirmState.confirm()}> 确定 </button>
+			</div>
+		</div>
+	</div>
+{/if}
+
+<style>
+	.confirm-backdrop {
+		position: fixed;
+		top: 0;
+		left: 0;
+		width: 100vw;
+		height: 100vh;
+		background: rgba(0, 0, 0, 0.4);
+		backdrop-filter: blur(2px);
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		z-index: 9999;
+	}
+
+	.confirm-dialog {
+		background: var(--bg-color, #ffffff);
+		color: var(--text-color, #000000);
+		border: 2px solid var(--text-color, #000000);
+		border-radius: 8px;
+		width: 90%;
+		max-width: 400px;
+		box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
+		overflow: hidden;
+		display: flex;
+		flex-direction: column;
+	}
+
+	.confirm-content {
+		padding: 24px;
+		font-size: 1.05rem;
+		line-height: 1.5;
+	}
+
+	.confirm-content p {
+		margin: 0;
+	}
+
+	.confirm-actions {
+		display: flex;
+		justify-content: flex-end;
+		gap: 12px;
+		padding: 16px 24px;
+		background: rgba(0, 0, 0, 0.02);
+		border-top: 1px solid var(--border-color, rgba(0, 0, 0, 0.08));
+	}
+
+	.btn {
+		padding: 8px 16px;
+		font-size: 0.9rem;
+		font-weight: 600;
+		border-radius: 4px;
+		cursor: pointer;
+		font-family: inherit;
+		transition: all 0.2s;
+	}
+
+	.btn-secondary {
+		background: transparent;
+		color: var(--text-color, #000000);
+		border: 1px solid var(--border-color, rgba(0, 0, 0, 0.2));
+	}
+
+	.btn-secondary:hover {
+		background: rgba(0, 0, 0, 0.05);
+	}
+
+	.btn-danger {
+		background: #dc3545;
+		color: white;
+		border: 1px solid #dc3545;
+	}
+
+	.btn-danger:hover {
+		background: #c82333;
+		border-color: #bd2130;
+	}
+
+	:global(.dark) .confirm-backdrop {
+		background: rgba(0, 0, 0, 0.6);
+	}
+
+	:global(.dark) .confirm-dialog {
+		background: var(--bg-color, #1a1a1a);
+		border-color: var(--border-color, #333333);
+	}
+
+	:global(.dark) .confirm-actions {
+		background: rgba(255, 255, 255, 0.02);
+	}
+</style>

src/lib/stores/confirm.svelte.ts

@@ -0,0 +1,36 @@
+import { untrack } from 'svelte';
+
+class ConfirmState {
+	isOpen = $state(false);
+	message = $state('');
+	private resolve: ((value: boolean) => void) | null = null;
+
+	async show(message: string): Promise<boolean> {
+		this.message = message;
+		this.isOpen = true;
+		return new Promise((res) => {
+			this.resolve = res;
+		});
+	}
+
+	confirm() {
+		untrack(() => {
+			if (this.resolve) this.resolve(true);
+			this.close();
+		});
+	}
+
+	cancel() {
+		untrack(() => {
+			if (this.resolve) this.resolve(false);
+			this.close();
+		});
+	}
+
+	private close() {
+		this.isOpen = false;
+		this.resolve = null;
+	}
+}
+
+export const confirmState = new ConfirmState();

src/routes/admin/+layout.svelte

@@ -3,6 +3,7 @@
 	import { page } from '$app/stores';
 	import { onMount } from 'svelte';
 	import Toast from '$lib/components/Toast.svelte';
+	import ConfirmDialog from '$lib/components/ConfirmDialog.svelte';
 
 	let { children } = $props();
 
@@ -102,6 +103,7 @@
 </main>
 
 <Toast />
+<ConfirmDialog />
 
 <style>
 	.admin-container {