Build all apps from Markdown content; Compose Desktop replaces GTK on Linux and Windows

- content/ + scripts/build-content.py produce content.json for every app
- stable lesson IDs with one-time progress migration (Swift, Kotlin)
- shared answer-check tests (tests/answers.json) for Kotlin and Swift
- android/desktop: Compose app with updater, speech and GTK progress import
- CI packages AppImage and Windows zip with ProGuard, runs the tests

Co-authored-by: Cursor <cursoragent@cursor.com>

content/anglictina/4-rocnik/06-slovni-zasoba-okruhu.md

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+---
+id: anglictina-4-slovni-zasoba-okruhu
+puvodni: en.4.6
+nazev: Slovní zásoba okruhů
+popis: Kolokace k maturitním tématům. Doplňování a kvíz.
+---
+
+# Výklad
+
+## Ne izolovaná slovíčka
+*Okruhy*
+
+- Heavy rain, strong coffee, fast food, junk food. Ne strong rain.
+- A balanced diet, processed food, a food allergy.
+- Public transport, rush hour, a traffic jam, a return ticket.
+- Renewable energy, a carbon footprint, a heatwave, a drought.
+
+> Tip: ústní zkouška sahá na osobu, rodinu, domov, školu, volný čas, kulturu, sport, cestování, zdraví, jídlo, služby, práci, společnost a přírodu.
+
+## Fráze, které unesou odstavec
+*Společnost a práce*
+
+- A gap year, an apprenticeship, a degree, tuition fees.
+- Freedom of speech, a stereotype, volunteer work.
+- Break the law, pay a fine, a witness.
+- Mental health, a check-up, be in pain. Ne have pain in the leg jako jediná možnost: My leg hurts.
+
+> Tip: apply for a job, hand in a notice, earn a living, from home.
+
+
+# Doplňování
+
+## There was heavy ___ all night.
+= rain
+> Heavy rain, ne strong rain.
+
+## I'd like a ___ ticket to Brno.
+= return
+> Return ticket = zpáteční.
+
+## She applied ___ the post of guide.
+= for
+> Apply for.
+
+## Solar power is ___ energy.
+= renewable
+> Renewable energy.
+
+## He has a nut ___, so he can't eat the cake.
+= allergy
+> A food allergy.
+
+
+# Kvíz
+
+## Which pair is right?
+- strong rain / heavy coffee
+- [x] heavy rain / strong coffee
+- fast coffee / junk rain
+- a traffic diet
+> Heavy rain, strong coffee.
+
+## Rush hour is…
+- a quiet morning
+- [x] the busiest time to travel
+- a kind of ticket
+- a school subject
+> Špička.
+
+## An apprenticeship is…
+- a fine
+- [x] training for a job
+- a heatwave
+- a stereotype
+> Praktická příprava na řemeslo nebo práci.
+
+## My leg ___.
+- [x] hurts
+- is pain
+- has hurted
+- does hurtness
+> My leg hurts.