feat(demo): add HintChip component with per-view localStorage dismiss

web/src/components/HintChip.vue

@@ -0,0 +1,63 @@
+<template>
+  <div v-if="!dismissed" class="hint-chip" role="status">
+    <span aria-hidden="true" class="hint-chip__icon">💡</span>
+    <span class="hint-chip__message">{{ message }}</span>
+    <button
+      class="hint-chip__dismiss"
+      @click="dismiss"
+      :aria-label="`Dismiss hint for ${viewKey}`"
+    >✕</button>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue'
+
+const props = defineProps<{
+  viewKey: string  // used for localStorage key — e.g. 'home', 'review'
+  message: string
+}>()
+
+const LS_KEY = `peregrine_hint_${props.viewKey}`
+const dismissed = ref(!!localStorage.getItem(LS_KEY))
+
+function dismiss(): void {
+  localStorage.setItem(LS_KEY, '1')
+  dismissed.value = true
+}
+</script>
+
+<style scoped>
+.hint-chip {
+  display: flex;
+  align-items: flex-start;
+  gap: var(--space-2, 8px);
+  background: var(--color-surface, #0d1829);
+  border: 1px solid var(--app-primary, #2B6CB0);
+  border-radius: var(--radius-md, 8px);
+  padding: var(--space-2, 8px) var(--space-3, 12px);
+  margin-bottom: var(--space-3, 12px);
+}
+
+.hint-chip__icon { flex-shrink: 0; font-size: 0.9rem; }
+
+.hint-chip__message {
+  flex: 1;
+  font-size: 0.85rem;
+  color: var(--app-primary-light, #68A8D8);
+  line-height: 1.4;
+}
+
+.hint-chip__dismiss {
+  flex-shrink: 0;
+  background: none;
+  border: none;
+  color: var(--color-text-muted, #8898aa);
+  cursor: pointer;
+  font-size: 0.75rem;
+  padding: 0 2px;
+  line-height: 1;
+}
+
+.hint-chip__dismiss:hover { color: var(--color-text, #eaeff8); }
+</style>

web/src/components/__tests__/HintChip.test.ts

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+import { describe, it, expect, beforeEach } from 'vitest'
+import { mount } from '@vue/test-utils'
+import HintChip from '../HintChip.vue'
+
+beforeEach(() => { localStorage.clear() })
+
+const factory = (viewKey = 'home', message = 'Test hint') =>
+  mount(HintChip, { props: { viewKey, message } })
+
+describe('HintChip', () => {
+  it('renders the message', () => {
+    const w = factory()
+    expect(w.text()).toContain('Test hint')
+  })
+
+  it('is hidden when localStorage key is already set', () => {
+    localStorage.setItem('peregrine_hint_home', '1')
+    const w = factory()
+    expect(w.find('.hint-chip').exists()).toBe(false)
+  })
+
+  it('hides and sets localStorage when dismiss button is clicked', async () => {
+    const w = factory()
+    await w.find('.hint-chip__dismiss').trigger('click')
+    expect(w.find('.hint-chip').exists()).toBe(false)
+    expect(localStorage.getItem('peregrine_hint_home')).toBe('1')
+  })
+})