feat: event anatomy slide

NIP-01 event rendered as syntax-highlighted JSON hugged by large
nostr-purple braces, with the derived id/sig fields badged and a
fill -> hash -> sign strip.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/slides/EventAnatomySlide.vue

@@ -0,0 +1,85 @@
+<script setup lang="ts">
+import { PenLine, Hash, KeyRound, ArrowRight } from '@lucide/vue'
+import SlideShell from './SlideShell.vue'
+
+// Each field of a NIP-01 event: the key, a sample value, and what it means.
+// `derived` fields aren't typed by you — they're computed when the event is signed.
+interface Field {
+  key: string
+  value: string
+  kind: 'string' | 'number' | 'array'
+  comment: string
+  derived?: boolean
+}
+
+const fields: Field[] = [
+  { key: 'pubkey', value: '"3bf0c6…2a"', kind: 'string', comment: 'who wrote it — your public key' },
+  { key: 'created_at', value: '1721600000', kind: 'number', comment: 'when — unix seconds' },
+  { key: 'kind', value: '1', kind: 'number', comment: '1 = short text note' },
+  { key: 'tags', value: '[["e","…"],["p","…"]]', kind: 'array', comment: 'references: reply-to, mentions' },
+  { key: 'content', value: '"gm nostr ⚡"', kind: 'string', comment: 'the message itself' },
+  { key: 'id', value: '"0a1b2c…9f"', kind: 'string', comment: 'sha256 of the fields above', derived: true },
+  { key: 'sig', value: '"d4e5…c7"', kind: 'string', comment: 'Schnorr sig over id — proof it’s you', derived: true },
+]
+
+const valueClass = { string: 'text-emerald-300', number: 'text-amber-300', array: 'text-zinc-300' }
+
+const steps = [
+  { icon: PenLine, label: 'Fill the fields', sub: 'pubkey · kind · tags · content · time' },
+  { icon: Hash, label: 'Hash them → id', sub: 'sha256 of the serialized event' },
+  { icon: KeyRound, label: 'Sign id → sig', sub: 'Schnorr signature with your nsec' },
+]
+</script>
+
+<template>
+  <SlideShell kicker="NIP-01 · the atom of Nostr" title="Anatomy of an event">
+    <!-- The event, as JSON, hugged by big nostr-purple braces -->
+    <div class="flex items-center justify-center gap-3 sm:gap-6">
+      <span class="select-none text-[9rem] font-thin leading-none text-violet-500/80 sm:text-[11rem]">{</span>
+
+      <div class="grid grid-cols-[auto_auto_1fr] items-center gap-x-5 gap-y-1.5 font-mono text-base sm:text-lg">
+        <template v-for="(f, i) in fields" :key="f.key">
+          <span
+            class="justify-self-end"
+            :class="f.derived ? 'font-semibold text-violet-300' : 'text-violet-300'"
+          >
+            "{{ f.key }}"<span class="text-zinc-500">:</span>
+          </span>
+          <span class="whitespace-nowrap" :class="valueClass[f.kind]"
+            >{{ f.value }}<span v-if="i < fields.length - 1" class="text-zinc-500">,</span></span
+          >
+          <span class="whitespace-nowrap text-sm text-zinc-600">
+            <span class="text-zinc-500">// </span>{{ f.comment
+            }}<span v-if="f.derived" class="ml-1 rounded bg-violet-500/15 px-1 text-xs text-violet-300"
+              >computed</span
+            >
+          </span>
+        </template>
+      </div>
+
+      <span class="select-none text-[9rem] font-thin leading-none text-violet-500/80 sm:text-[11rem]">}</span>
+    </div>
+
+    <!-- How it's built & signed -->
+    <div class="mt-8 flex flex-col items-stretch gap-3 sm:flex-row sm:items-center sm:justify-center">
+      <template v-for="(s, i) in steps" :key="s.label">
+        <div class="flex items-center gap-3 rounded-xl border border-zinc-700 bg-zinc-900/60 px-4 py-3">
+          <component :is="s.icon" class="h-6 w-6 flex-none text-violet-400" />
+          <div>
+            <p class="font-semibold text-white">{{ s.label }}</p>
+            <p class="text-xs text-zinc-400">{{ s.sub }}</p>
+          </div>
+        </div>
+        <ArrowRight
+          v-if="i < steps.length - 1"
+          class="mx-auto h-5 w-5 flex-none rotate-90 text-zinc-500 sm:rotate-0"
+        />
+      </template>
+    </div>
+
+    <p class="mt-6 text-center text-sm text-zinc-500">
+      Anyone recomputes the hash and checks <code class="text-zinc-300">sig</code> against your
+      <code class="text-zinc-300">pubkey</code> — tamper with one character and it fails. No server vouches for you; the math does.
+    </p>
+  </SlideShell>
+</template>