feat: Encapsulate Platform Conditional Exports

[AustinChangLinksys]

Summary

Encapsulated all platform-specific conditional imports into entry point files, eliminating exposed if (dart.library.*) patterns in consumer files.

Changes

New Entry Point Files Created (7 files)

• lib/core/utils/ip_getter/ip_getter.dart
• lib/util/url_helper/url_helper.dart (refactored)
• lib/util/export_selector/export_selector.dart
• lib/util/get_log_selector/get_log_selector.dart
• lib/constants/client_type/client_type.dart
• lib/core/utils/assign_ip/assign_ip.dart
• lib/core/utils/assign_ip/mobile_assign_ip.dart (no-op native impl)

Consumer Files Updated (17 files)

All consumer files now use clean single-line imports instead of conditional imports.

Benefits

• Cleaner code: Consumers only import entry point files
• Encapsulation: Platform-specific logic hidden inside entry points
• Maintainability: Changes to platform implementations don't affect consumers

Documentation

See doc/audit/platform-conditional-exports-audit.md for full audit report.

Branch

austin/platform-conditional-exports-encapsulation

Verification

• flutter analyze passes
• flutter build web succeeds

[AustinChangLinksys]

Update

PR created: #583

Verification Completed

• ✅ flutter analyze passes
• ✅ flutter build web succeeds
• ✅ All tests pass (2701 tests)
• ✅ Localization snapshots generated

Branch

austin/platform-conditional-exports-encapsulation → dev-2.0.0