feat(faq): wire Dr. Flask intro video into the phone-frame lightbox

The 85s v2 intro plays click-to-play in the phone mockup with fully custom
controls (play/pause, green seek bar, live timecode, mute, fullscreen) — no
loop, pause on close, Esc/backdrop/X to dismiss. Opens with sound on the cover
click (user gesture); falls back to muted autoplay if the browser blocks it.

- Transcoded the 163 MB / ~15 Mbps export -> 10.8 MB (720x1280, H.264 CRF 28,
  +faststart) so it only downloads when a visitor opts in (preload=metadata).
- Poster = a v2 frame grabbed from the video (drflask-poster.jpg, ~60 KB).
- Source 163 MB master stays untracked in docs/character/.

Verified live via Playwright: video loads (readyState 4, 85s), autoplays on
open, timecode/seek-fill track, play/pause + mute buttons both toggle state.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/views/marketing/FaqView.vue

@@ -1,11 +1,13 @@
 <script setup lang="ts">
-import { ref, onMounted, onUnmounted } from 'vue'
+import { ref, computed, nextTick, onMounted, onUnmounted } from 'vue'
 import { RouterLink } from 'vue-router'
 import Icon from '@/components/ds/core/Icon.vue'
 import CorrosionMark from '@/components/brand/CorrosionMark.vue'
-// Dr. Flask, Ph.D. — the chemistry glossary's mascot/cover (placeholder render).
-// Web-optimized from docs/character/drflask-final.png.
+// Dr. Flask, Ph.D. — the chemistry glossary's mascot. Cover card (v1 render),
+// plus the v2 intro video + a poster frame grabbed from it for the lightbox.
 import drFlask from '@/assets/mascots/drflask.png'
+import drFlaskVideo from '@/assets/mascots/drflask-intro.mp4'
+import drFlaskPoster from '@/assets/mascots/drflask-poster.jpg'
 
 interface FaqItem {
   question: string
@@ -222,6 +224,83 @@ function toggle(key: string): void {
   openKey.value = openKey.value === key ? null : key
 }
 
+// Dr. Flask intro video — plays in a phone-frame lightbox with custom controls.
+const videoOpen = ref<boolean>(false)
+const videoEl = ref<HTMLVideoElement | null>(null)
+const playing = ref(false)
+const isMuted = ref(false)
+const curTime = ref(0)
+const duration = ref(0)
+const progressPct = computed(() =>
+  duration.value > 0 ? (curTime.value / duration.value) * 100 : 0,
+)
+
+function openVideo(): void {
+  videoOpen.value = true
+  document.body.style.overflow = 'hidden'
+  // The cover click is a user gesture, so try to play with sound; if the
+  // browser's autoplay policy blocks it, fall back to muted playback (always
+  // allowed) and surface the unmute control.
+  nextTick(() => {
+    const v = videoEl.value
+    if (!v) return
+    v.currentTime = 0
+    v.muted = false
+    isMuted.value = false
+    v.play().catch(() => {
+      v.muted = true
+      isMuted.value = true
+      v.play().catch(() => {})
+    })
+  })
+}
+function closeVideo(): void {
+  videoOpen.value = false
+  document.body.style.overflow = ''
+  videoEl.value?.pause()
+}
+function onKeydown(e: KeyboardEvent): void {
+  if (e.key === 'Escape' && videoOpen.value) closeVideo()
+}
+
+function togglePlay(): void {
+  const v = videoEl.value
+  if (!v) return
+  if (v.paused) v.play().catch(() => {})
+  else v.pause()
+}
+function toggleMute(): void {
+  const v = videoEl.value
+  if (!v) return
+  v.muted = !v.muted
+  isMuted.value = v.muted
+}
+function seek(e: MouseEvent): void {
+  const v = videoEl.value
+  if (!v || !duration.value) return
+  const rect = (e.currentTarget as HTMLElement).getBoundingClientRect()
+  const pct = Math.min(1, Math.max(0, (e.clientX - rect.left) / rect.width))
+  v.currentTime = pct * duration.value
+}
+function toggleFullscreen(): void {
+  const v = videoEl.value as (HTMLVideoElement & { webkitEnterFullscreen?: () => void }) | null
+  if (!v) return
+  const frame = v.closest('.phone') as (HTMLElement & { requestFullscreen?: () => Promise<void> }) | null
+  if (document.fullscreenElement) {
+    void document.exitFullscreen?.()
+  } else if (frame?.requestFullscreen) {
+    void frame.requestFullscreen()
+  } else if (v.webkitEnterFullscreen) {
+    v.webkitEnterFullscreen() // iOS Safari: only the <video> can go fullscreen
+  }
+}
+function fmtTime(s: number): string {
+  if (!Number.isFinite(s)) return '0:00'
+  const m = Math.floor(s / 60)
+  const sec = Math.floor(s % 60)
+  return `${m}:${sec.toString().padStart(2, '0')}`
+}
+
 function itemKey(groupLabel: string, idx: number): string {
   return `${groupLabel}-${idx}`
 }
@@ -245,8 +324,12 @@ function initReveal(): void {
   document.querySelectorAll('.reveal').forEach((el) => io?.observe(el))
 }
 
-onMounted(() => { initReveal() })
-onUnmounted(() => { io?.disconnect() })
+onMounted(() => { initReveal(); window.addEventListener('keydown', onKeydown) })
+onUnmounted(() => {
+  io?.disconnect()
+  window.removeEventListener('keydown', onKeydown)
+  document.body.style.overflow = ''
+})
 </script>
 
 <template>
@@ -322,7 +405,11 @@ onUnmounted(() => { io?.disconnect() })
   <section class="sec sec--lab" id="chemistry">
     <div class="wrap">
       <div class="lab-intro reveal">
+        <button class="lab-intro__cover" type="button" @click="openVideo" aria-label="Play Dr. Flask intro video">
           <img :src="drFlask" alt="Dr. Flask, Ph.D. — Chemistry Teacher" class="lab-intro__card" />
+          <span class="lab-intro__play"><Icon name="play" :size="24" /></span>
+          <span class="lab-intro__watch">Watch the intro</span>
+        </button>
         <div class="lab-intro__copy">
           <span class="eyebrow">Glossary</span>
           <h2 class="title">Brush up on your chemistry while managing your game server</h2>
@@ -402,6 +489,48 @@ onUnmounted(() => { io?.disconnect() })
       </div>
     </div>
   </section>
+
+  <!-- DR. FLASK INTRO — phone-frame lightbox -->
+  <Teleport to="body">
+    <div v-if="videoOpen" class="vmodal" @click.self="closeVideo">
+      <button class="vmodal__close" type="button" @click="closeVideo" aria-label="Close">
+        <Icon name="x" :size="20" />
+      </button>
+      <div class="phone" role="dialog" aria-label="Dr. Flask intro video">
+        <span class="phone__island" />
+        <div class="phone__screen">
+          <video
+            ref="videoEl"
+            class="phone__media"
+            :src="drFlaskVideo"
+            :poster="drFlaskPoster"
+            playsinline
+            preload="metadata"
+            @click="togglePlay"
+            @play="playing = true"
+            @pause="playing = false"
+            @timeupdate="curTime = videoEl?.currentTime ?? 0"
+            @loadedmetadata="duration = videoEl?.duration ?? 0"
+          />
+          <div class="phone__controls">
+            <button class="pc-btn" type="button" @click="togglePlay" :aria-label="playing ? 'Pause' : 'Play'">
+              <Icon :name="playing ? 'pause' : 'play'" :size="18" />
+            </button>
+            <div class="pc-track" @click="seek">
+              <span class="pc-fill" :style="{ width: progressPct + '%' }" />
+            </div>
+            <span class="pc-time">{{ fmtTime(curTime) }} / {{ fmtTime(duration) }}</span>
+            <button class="pc-btn" type="button" @click="toggleMute" :aria-label="isMuted ? 'Unmute' : 'Mute'">
+              <Icon :name="isMuted ? 'volume-x' : 'volume-2'" :size="17" />
+            </button>
+            <button class="pc-btn" type="button" @click="toggleFullscreen" aria-label="Fullscreen">
+              <Icon name="maximize" :size="16" />
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </Teleport>
 </template>
 
 <style scoped>
@@ -495,12 +624,56 @@ onUnmounted(() => { io?.disconnect() })
   max-width: 920px;
   margin: 0 auto 40px;
 }
+.lab-intro__cover {
+  position: relative;
+  display: block;
+  width: 100%;
+  padding: 0;
+  border: 0;
+  background: none;
+  cursor: pointer;
+  border-radius: var(--radius-lg);
+}
 .lab-intro__card {
+  display: block;
   width: 100%;
   height: auto;
   border-radius: var(--radius-lg);
   box-shadow: var(--ring-default), 0 18px 40px rgba(0, 0, 0, 0.45);
 }
+.lab-intro__play {
+  position: absolute;
+  inset: 0;
+  margin: auto;
+  width: 58px;
+  height: 58px;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: #fff;
+  background: rgba(0, 0, 0, 0.45);
+  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45), 0 8px 22px rgba(0, 0, 0, 0.45);
+  transition: transform var(--dur-fast), background var(--dur-fast);
+}
+.lab-intro__play :deep(svg) { margin-left: 3px; } /* optical-center the play triangle */
+.lab-intro__watch {
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: 12px;
+  text-align: center;
+  font-size: var(--text-xs);
+  font-weight: 600;
+  letter-spacing: 0.02em;
+  color: #fff;
+  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
+}
+.lab-intro__cover:hover .lab-intro__play {
+  transform: scale(1.08);
+  background: var(--accent);
+  color: #06170d;
+}
 .lab-intro__copy { text-align: left; }
 .lab-intro__copy .eyebrow { display: block; margin-bottom: 12px; }
 .lab-intro__copy .title { margin: 0 0 14px; }
@@ -584,8 +757,106 @@ onUnmounted(() => { io?.disconnect() })
 }
 .drflask-card__quips strong { color: var(--accent-text); }
 
+/* Dr. Flask intro — phone-frame lightbox */
+.vmodal {
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 24px;
+  background: rgba(6, 8, 10, 0.8);
+  backdrop-filter: blur(6px);
+}
+.vmodal__close {
+  position: absolute;
+  top: 22px;
+  right: 22px;
+  width: 40px;
+  height: 40px;
+  border: 0;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: #fff;
+  background: rgba(255, 255, 255, 0.08);
+  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
+  cursor: pointer;
+  transition: background var(--dur-fast);
+}
+.vmodal__close:hover { background: rgba(255, 255, 255, 0.18); }
+
+.phone {
+  position: relative;
+  height: min(78vh, 620px);
+  aspect-ratio: 9 / 19.5;
+  padding: 9px;
+  border-radius: 42px;
+  background: linear-gradient(155deg, #1c1f24, #0c0d10);
+  box-shadow: 0 0 0 2px #2b2e34, 0 32px 70px rgba(0, 0, 0, 0.6);
+}
+.phone__island {
+  position: absolute;
+  top: 19px;
+  left: 50%;
+  transform: translateX(-50%);
+  width: 88px;
+  height: 24px;
+  border-radius: 14px;
+  background: #000;
+  z-index: 2;
+}
+.phone__screen {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  border-radius: 33px;
+  overflow: hidden;
+  background: #000;
+}
+.phone__media { width: 100%; height: 100%; object-fit: cover; background: #06070a; cursor: pointer; }
+.phone__controls {
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  display: flex;
+  align-items: center;
+  gap: 11px;
+  padding: 14px 14px 18px;
+  color: #fff;
+  background: linear-gradient(to top, rgba(0, 0, 0, 0.78), transparent);
+}
+.pc-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex: none;
+  padding: 0;
+  border: 0;
+  background: none;
+  color: #fff;
+  opacity: 0.95;
+  cursor: pointer;
+  transition: opacity var(--dur-fast), color var(--dur-fast);
+}
+.pc-btn:hover { opacity: 1; color: #5bd183; }
+.pc-track {
+  flex: 1;
+  height: 4px;
+  border-radius: 3px;
+  background: rgba(255, 255, 255, 0.3);
+  position: relative;
+  cursor: pointer;
+}
+.pc-fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 3px; background: #5bd183; }
+.pc-time { font-size: 11px; font-variant-numeric: tabular-nums; opacity: 0.85; flex: none; }
+
 @media (max-width: 720px) {
   .lab-intro { grid-template-columns: 1fr; gap: 18px; justify-items: center; text-align: center; }
+  .lab-intro__cover { max-width: 280px; }
   .lab-intro__card { max-width: 280px; }
   .lab-intro__copy { text-align: center; }
   .term-grid { grid-template-columns: 1fr; }