fix: forward TextInputConnection.updateStyle for Flutter 3.44

[MarcelKaeding]

Required to build Superlist on Flutter 3.44 (superlist is upgrading 3.38.3 → 3.44.8).

Problem

Flutter 3.44 moved the body of TextInputConnection.setStyle into a new updateStyle(TextInputStyle) method (flutter/flutter#180436, the web IME style-syncing fix). TextInputConnectionDecorator implements TextInputConnection by forwarding every member, so it no longer satisfies the interface:

lib/src/default_editor/document_ime/document_ime_communication.dart:22:7:
Error: The non-abstract class 'DocumentImeInputClient' is missing implementations
for these members:
 - TextInputConnection.updateStyle

Every test and build touching the editor fails to compile.

Fix

Forward updateStyle like the other members. setStyle is left as-is — the framework’s default implementation now delegates to updateStyle, so behaviour is unchanged on both old and new SDKs.

Notes

Based on 0ee92f3896, the commit Superlist currently locks, so this branch contains nothing but the compile fix. It is one commit behind feature/upgrade-to-latest (c5e54709ac), which touches a different file and merges cleanly.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR updates TextInputConnectionDecorator to remain compatible with Flutter 3.44’s TextInputConnection interface changes by forwarding the newly introduced updateStyle(...) method, unblocking builds/tests that compile against Flutter 3.44.

Changes:

• Add forwarding implementation for TextInputConnection.updateStyle(TextInputStyle) in the decorator.

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[MarcelKaeding]

@copilot Fix the code for all comments in this review thread.

When a review comment includes a suggested change, apply the suggestion exactly.

Do not make changes beyond what is described in the linked review thread.

[Copilot]

@copilot Fix the code for all comments in this review thread.

When a review comment includes a suggested change, ap...

Implemented in commit e2073ba. I updated TextInputConnectionDecorator.updateStyle in ime_decoration.dart to avoid a hard dependency on Flutter 3.44 (TextInputStyle) by using a dynamic forwarder, which addresses the compatibility concern from the linked review thread without additional scope changes.