chore(flutter): support Flutter 3.47.2 while keeping 3.27 and 3.35 working.

[TheNoumanDev]

Support Flutter 3.47.2

Upgrades the monorepo to Flutter 3.47.2 / Dart 3.13.2, without dropping the older SDKs
consuming apps still run.

	3.27.4	3.38.7	3.47.2
resolve	✅	✅	✅
analyze / test	✅ 0 errors, 206/206	✅	✅ 0 errors, 206/206
starter build	✅ web (--web-renderer html)	✅ web + android + iOS	✅ web + android + iOS

On 3.27.4, melos bootstrap reports that modules/auth / chat / ensemble_bluetooth would need
their collection / meta constraints downgraded. Those were left as-is — they are opt-in modules
the core runtime does not depend on, and the constraints predate this PR.

modules/ensemble now declares flutter: ">=3.27.0" (verified manually on all three above).
CI build.yml builds the starter on 3.38.7 + 3.47.2 (was ["3.38.7"]); every other workflow is
pinned to 3.47.2 (was 3.32.5 / floating stable).

What was blocking

1. intl capped at <=0.20.2 in 4 pubspecs — 3.47.2's flutter_localizations needs ^0.20.3, so nothing resolved.
2. describeEnum removed in 3.47 — called in framework/device.dart.
3. font_awesome_flutter 10.x subclasses IconData, which 3.44 made final — 8 compile errors, broke 32 of 38 test files.
4. Android toolchain below 3.47.2's error floor — AGP 8.9.1 (needs 8.11.1), Kotlin 2.1.10 (needs 2.2.20).

What was fixed

• intl → ">=0.17.0 <=0.20.3" (spans 3.27's 0.19.0, 3.35's 0.20.2 and 3.47's ^0.20.3).
• describeEnum(x) → x.name.
• font_awesome_flutter → ">=10.9.0 <12.0.0" + a _fa() shim so one file compiles against both 10.x (IconData) and 11.x (FaIconData.data). Pub picks 10.9.1 on Dart 3.6, 11.0.0 on Dart ≥3.9.
• AGP → 8.11.1, Kotlin → 2.2.20, Java target → 17.
• Deprecations migrated (each with its migration link in-line): dialogBackgroundColor, ThemeData.indicatorColor, ColorScheme.background/onBackground/surfaceVariant, dataRowHeight, copyWith(useMaterial3:), Color.alpha, share_plus, firebase_app_check providers.
• CI: all 8 workflows pinned to 3.47.2; build.yml matrix widened to ["3.38.7", "3.47.2"].
• Fixed a pre-existing bug: resolvedWebViewCookieBaseUrl didn't trim, failing its own test.

Deliberately kept deprecated where the replacement needs a newer SDK than we support —
cacheExtent, Matrix4.translate/scale, Color.value — each behind // ignore: + a
TODO(flutter-upgrade) naming the version that unlocks it. Same reason Radio → RadioGroup is
not done: RadioGroup doesn't exist before 3.35, and we have to support 3.27; that's why these are not upgraded yet, and nothing is breaking currently.

Testing

• 3 SDKs × (bootstrap + analyze + test) — all green.
• Starter builds: Android APK, web (incl. --web-renderer html on 3.27.4), iOS.
• Tested Kitchen Sink and the functionality of the files we changed.
• Tested Sports App

Follow-ups (tickets)

1. Migrate web code off dart:html/package:js → package:web (12 files marked TODO(web-wasm)); once 3.27 support is dropped.
2. Radio → RadioGroup, once 3.27 support is dropped.
3. SwiftPM in our own plugins — Firebase stops publishing to CocoaPods after Oct 2026.
4. iOS UIScene lifecycle — not required now, but Apple enforces it for apps built with the iOS 27 SDK.