chore: establish Strategy Lab source baseline (development, not release)

1 files changed, 66 insertions, 0 deletions

diff --git a/frontend/src/components/Status.svelte b/frontend/src/components/Status.svelte
new file mode 100644
index 0000000..019c224
--- /dev/null
+++ b/frontend/src/components/Status.svelte
@@ -0,0 +1,66 @@
+<script lang="ts">
+  interface Props {
+    error?: string | null;
+    busy?: boolean;
+    busyText?: string;
+    empty?: string | boolean | null;
+    emptyHint?: string;
+    warnings?: string[];
+  }
+  let { error, busy, busyText = '加载中…', empty, emptyHint, warnings }: Props = $props();
+</script>
+
+{#if busy}
+  <div class="status" role="status">
+    <span class="spinner" aria-hidden="true"></span>
+    {busyText}
+  </div>
+{:else if error}
+  <div class="banner error" role="alert">
+    <span aria-hidden="true">⚠</span>
+    <span>{error}</span>
+  </div>
+{:else if empty !== null && empty !== undefined && empty !== false}
+  <div class="state empty">
+    <p class="empty-title">{empty}</p>
+    {#if emptyHint}<p class="hint">{emptyHint}</p>{/if}
+  </div>
+{/if}
+{#if warnings && warnings.length > 0}
+  <div class="stack">
+    {#each warnings as w, i (i)}
+      <div class="banner warn"><span aria-hidden="true">△</span><span>{w}</span></div>
+    {/each}
+  </div>
+{/if}
+
+<style>
+  .status {
+    color: var(--text-3);
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    padding: 0.9rem 0;
+    font-size: 0.9rem;
+  }
+  .spinner {
+    width: 15px;
+    height: 15px;
+    border: 2px solid var(--teal);
+    border-top-color: transparent;
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+  }
+  @keyframes spin {
+    to { transform: rotate(360deg); }
+  }
+  .empty {
+    text-align: center;
+    padding: 2.2rem 1rem;
+    border: 1px dashed var(--border-strong);
+    border-radius: var(--radius);
+    color: var(--text-2);
+    background: var(--surface);
+  }
+  .empty-title { font-weight: 600; margin-bottom: 0.2rem; }
+</style>