Add the Academy: narrated, animated roasting & brewing lessons; cupping link on roast detail

Academy (/academy, 'Learn' nav group):
- 10 lessons / 45 slides across two tracks. Roasting: seed anatomy and
  composition, drying & the turning point, Maillard, first crack &
  development (DTR), curve/RoR reading (crash, flick, stall), defects →
  one-change discipline. Brewing: extraction physics (dissolving order,
  yield, grind, temp/time/ratio), then technique per brewer family —
  immersion (French press, AeroPress, Clever/Hario Switch, cold brew,
  cupping), percolation (bloom, V60, Chemex/Kalita, batch, percolator),
  espresso & pressure (puck prep, shot reading, dialing in, moka)
- One cohesive scene system: 25 parameterized animated SVG scenes drawn
  from the app's palette (beans, curves, phase bars, brewers reusing the
  silhouette library), CSS keyframe animations, reduced-motion support
- Narration: Azure TTS (en-US-Andrew HD, eastus) pre-generated to 45
  committed MP3s by scripts/generate-academy-audio.mjs; slides speak
  phonetic respellings (my-YARD, KEM-ex, MOH-kah…) while captions show
  normal spelling; hands-free autoplay advances after each clip
- Player: slide dots, keyboard arrows/space, per-slide captions

Roast detail: 'Open cupping session' button next to cup notes (opens or
creates the linked plan's session) — its score and flavors flow into
the updated .alog download.

Co-Authored-By: Claude Fable 5 <[email protected]>

test/brewing.test.js

@@ -423,6 +423,29 @@ test("gear: owned brewers/grinders round-trip, validate, and stay private", asyn
 	assert.deepEqual((await stranger.get("/api/gear")).body.gear.brewers, []);
 });
 
+test("academy shell page requires a session and lesson audio ids all exist", async () => {
+	const { agent } = await setup();
+	const anonymous = await agent.get("/academy");
+	assert.equal(anonymous.status, 302);
+	assert.equal(anonymous.headers.location, "/login");
+	await signup(agent, "[email protected]");
+	const page = await agent.get("/academy");
+	assert.equal(page.status, 200);
+	assert.match(page.text, /Academy/);
+	// Every slide must have committed narration audio — a missing file would silently break
+	// the hands-free autoplay flow.
+	const { ACADEMY_TRACKS } = await import("../public/js/academy-content.js");
+	const { existsSync } = await import("node:fs");
+	for (const track of ACADEMY_TRACKS)
+		for (const lesson of track.lessons)
+			for (const slide of lesson.slides)
+				assert.equal(
+					existsSync(new URL(`../public/academy-audio/${slide.id}.mp3`, import.meta.url).pathname),
+					true,
+					`missing audio for ${slide.id}`,
+				);
+});
+
 test("per-user export and openapi spec", async () => {
 	const { agent } = await setup();
 	const { csrf } = await signup(agent, "[email protected]");