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]>

server/app.js

@@ -50,6 +50,7 @@ const PUBLIC_SHELL_FILES = new Set([
 	"/brews.html",
 	"/gear.html",
 	"/roasters.html",
+	"/academy.html",
 	"/api-docs.html",
 ]);
 
@@ -146,6 +147,7 @@ export function createApp({
 			req.path === "/brews" ||
 			req.path === "/gear" ||
 			req.path === "/roasters" ||
+			req.path === "/academy" ||
 			req.path === "/api-docs"
 		)
 			res.set("Cache-Control", "no-store, private");
@@ -428,6 +430,7 @@ export function createApp({
 		["/brews", "brews.html"],
 		["/gear", "gear.html"],
 		["/roasters", "roasters.html"],
+		["/academy", "academy.html"],
 		["/api-docs", "api-docs.html"],
 	]) {
 		app.get(route, async (req, res, next) => {