…to TextInputConnectionDecorator (#2950)

…lutter 3.35-3.40 compat)

Upstream commit b422c32 (PR Flutter-Bounty-Hunters#2950, Feb 2026) added:

  @OverRide
  void updateStyle(TextInputStyle style) => client?.updateStyle(style);

to TextInputConnectionDecorator in anticipation of Flutter's
"Deprecate TextInputConnection.setStyle" breaking change
(flutter/flutter#180436), which adds TextInputConnection.updateStyle(
TextInputStyle) and deprecates setStyle(...).

Per docs.flutter.dev/release/breaking-changes/deprecate-text-input-
connection-set-style (last updated 2026-03-03), the change is "Landed
in version: TBD / In stable release: Not yet."

Our pinned Flutter is 3.35.7 (`flutter --version`):
  - flutter-sdk-3.35.5/packages/flutter/lib/src/services/text_input.dart
    declares only `void setStyle({...})`. There is no `class TextInputStyle`
    and no `void updateStyle(...)` on TextInputConnection.
  - TextInputConnectionDecorator implements TextInputConnection, so the
    override fails to compile: "TextInputStyle isn't a type" + "method
    updateStyle isn't defined for the type TextInputConnection".

There is no Dart conditional-imports trick that can selectively
include an interface override based on host SDK version (conditional
imports switch libraries, not class members).

Fix: drop the override and replace it with a comment block that:
  - Explains the upstream origin (PR Flutter-Bounty-Hunters#2950, commits 4703643 / b422c32).
  - Cites the Flutter breaking-change doc.
  - Documents restore criteria (when Flutter ships TextInputStyle in
    stable AND we upgrade past that release).

This is a no-op functionally on stable Flutter: setStyle(...) above
already covers the entire surviving public API; the framework can't
call a method that doesn't exist on the parent class.

Tracked as fork divergence #6 in FORK_CHANGES.md, marked as
TEMPORARY. Will be re-asserted on each upstream sync until either
upstream gates this on a Flutter version constraint or we upgrade
past the TextInputStyle-shipping stable release.

Refs: #13 (parent merge PR)

…2951)

[Super Editor] - Flutter breaking change fix: Add updateStyle method to TextInputConnectionDecorator (#2950)

Co-authored-by: Matt Carroll <matthew-carroll@users.noreply.github.com>