Fix FRB generation during Flutter init

[calcitem]

📜 Description

Install flutter_rust_bridge_codegen in the Cursor Docker image and run FRB code generation before building the Rust workspace in flutter-init.sh.

Refresh the committed Dart FRB bridge output and update Rust/Dart call sites so the regenerated bridge compiles cleanly.

💡 Motivation and Context

Docker initialization was building the Rust workspace before crates/tgf-frb/src/frb_generated.rs existed, causing rust_lib_sanmill to fail with file not found for module frb_generated.

💚 How did you test it?

• cargo install flutter_rust_bridge_codegen --version 2.12.0 --locked
• bash ./flutter-init.sh
• ./format.sh s
• cargo build --workspace
• cargo build -p rust_lib_sanmill
• flutter test test/games/mill/native_mill_rules_port_ffi_test.dart with a temporary Linux library symlink for the test's hard-coded .dll path

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

  

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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