flutter-build-releaselisted

# Flutter Build and Release Produce reproducible artifacts for the requested platforms while preserving secrets and external-release authority. ## Preflight Read SDK constraints, flavors/schemes, bundle/application IDs, version source, signing configuration, environment injection, CI, native deployment targets, and store requirements. Never print or commit secrets, keystores, provisioning material, or service credentials. ## Rules - Keep environment selection explicit and fail safely when required values are missing. - Align Dart defines, Android variants, Apple schemes/configurations, and service files by environment. - Increment versions according to the repository's release policy. - Build the exact requested artifact and keep symbols needed for crash deobfuscation. - Treat obfuscation as code-hardening, not secret protection. - Validate icons, names, permissions, privacy declarations, and target-specific metadata. - Make CI use pinned or declared tool versions where practical. - Require explicit authorization immediately before store upload, signing-credential mutation, tagging, or publishing. ## Verification Run formatting, analysis, tests, and a clean release build for each intended target/flavor. Install or serve the built artifact and smoke-test startup plus a critical flow. Record artifact path, version, flavor, target, and remaining store-side work. ## References - Read [flavor and scheme alignment](references/flavor-and-scheme-alignment.md) when coordinati