Address classroom tester feedback (Detlef / FSC e.V.)

Fixes the most impactful issues from ~1.5h of testing:

- TTS: spell SID prefixes phonetically (ANEKI → Alfa November Echo Kilo
  India) so unfamiliar waypoint names are intelligible without prior
  briefing context.
- TTS: expand standalone uppercase waypoints after via/direct (with a
  skip list for common ATC English tokens like MAYDAY, CLEARED, …).
- TTS: join taxi route tokens with ", " so pauses land between
  taxiways (C5, Z5, U10, …) instead of running together.
- TTS: handle "ILS Z 25C" variant before the runway → "ILS Zulu runway
  two five center" (was previously read as "Zee twentyfive cee").
- Scenarios: derive arrivalRunway from the chosen approach so the
  controller no longer clears a flight for ILS 25C onto runway 18.
- Radio check: accept any readability 1–5 (numeric or spoken), shorten
  placeholder so it fits the sm-width field.
- Line-up readback: clearer hint about the runway-first ICAO order.
- Classroom UI: disable browser autocomplete/autocorrect on readback
  inputs (Edge autofill was injecting unrelated values).
- Classroom UI: "Speak answer" button replays the expected readback as
  TTS so students can hear the correct phrasing.

Tests adjusted for the new SID and taxi-route phonetics.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

shared/data/learnModules.ts

@@ -480,12 +480,8 @@ const fundamentalsLessons: Lesson[] = [
         key: 'rc-readability',
         label: 'Readability',
         expected: scenario => scenario.readabilityWord,
-        alternatives: scenario => [
-          scenario.readability.toString(),
-          scenario.readabilityWord,
-          scenario.readabilityWord.toLowerCase()
-        ],
-        placeholder: 'Enter readability (1-5)',
+        alternatives: () => ['1', '2', '3', '4', '5', 'one', 'two', 'three', 'four', 'five', 'wun', 'too', 'tree', 'fife'],
+        placeholder: '1–5',
         width: 'sm'
       }
     ],
@@ -927,8 +923,8 @@ const readbackLessons: Lesson[] = [
     desc: 'Acknowledge line up and wait',
     keywords: ['Tower', 'Line Up'],
     hints: [
-      'Repeat the runway, then say "line up and wait".',
-      'Place the call sign at the end.'
+      'In the readback, state the runway first — even though the controller said it last.',
+      'ICAO standard: runway leads the readback, then "line up and wait", then your call sign.'
     ],
     fields: [
       {
@@ -2847,7 +2843,8 @@ const fullFlightLessons: Lesson[] = [
     desc: 'Acknowledge the line-up clearance',
     keywords: ['Tower', 'Line Up', 'Flow'],
     hints: [
-      'Repeat the runway and add "line up and wait".'
+      'In the readback, state the runway first — even though the controller said it last.',
+      'ICAO standard: runway leads the readback, then "line up and wait", then your call sign.'
     ],
     fields: [
       {