Beginning of File System integration

src/lib/Modal.svelte

@@ -0,0 +1,78 @@
+<script lang="ts">
+  import type { Snippet } from 'svelte';
+
+  interface Props {
+    visible?: boolean;
+    title?: string;
+    onClose?: () => void;
+    children: Snippet;
+  }
+
+  let { visible = $bindable(false), title = '', onClose, children }: Props = $props();
+
+  function handleBackdropClick(e: MouseEvent) {
+    if (e.target === e.currentTarget) {
+      close();
+    }
+  }
+
+  function close() {
+    visible = false;
+    onClose?.();
+  }
+</script>
+
+{#if visible}
+  <div class="modal-backdrop" onclick={handleBackdropClick} role="dialog" tabindex="-1">
+    <div class="modal-content">
+      {#if title}
+        <div class="modal-header">
+          <h3>{title}</h3>
+        </div>
+      {/if}
+      <div class="modal-body">
+        {@render children()}
+      </div>
+    </div>
+  </div>
+{/if}
+
+<style>
+  .modal-backdrop {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-color: rgba(0, 0, 0, 0.7);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 1000;
+  }
+
+  .modal-content {
+    background-color: #2a2a2a;
+    border: 1px solid #3a3a3a;
+    min-width: 300px;
+    max-width: 500px;
+    max-height: 80vh;
+    overflow: auto;
+  }
+
+  .modal-header {
+    padding: 1rem 1.5rem;
+    border-bottom: 1px solid #3a3a3a;
+  }
+
+  .modal-header h3 {
+    margin: 0;
+    color: rgba(255, 255, 255, 0.87);
+    font-size: 1rem;
+    font-weight: 600;
+  }
+
+  .modal-body {
+    padding: 1.5rem;
+  }
+</style>