🧹 fix: Resolve analyzer lints and removed ignored comments

[NITISH-R-G]

🎯 What: Removed unused variables and explicit ignore comments. \n💡 Why: To improve code quality and resolve analyzer warnings. \n✅ Verification: Verified via dart analyze and flutter test.\n✨ Result: Clean lints.

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PR created automatically by Jules for task 12559682830414000108 started by @NITISH-R-G

Summary by Sourcery

Resolve analyzer lints and clean up unused/ignored code across services, UI, and localization config.

Enhancements:

• Remove unused Ref fields from WebRtcVoiceCallService and FamilyCircleService constructors while preserving initialization behavior.
• Replace explicit ignore comments with unawaited when firing off background first-aid advice loading.
• Reorder imports in first_aid_screen to satisfy analyzer style conventions.

Build:

• Add an explicit empty header field to l10n.yaml to satisfy localization tooling configuration expectations.

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Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR cleans up analyzer lints by removing unused Riverpod Ref fields, replacing ignore comments with proper patterns, adjusting imports, and configuring localization header output.

Sequence diagram for FirstAidStore side-channel call using unawaited

sequenceDiagram
  participant FirstAidScreenState
  participant FirstAidStore

  FirstAidScreenState->>FirstAidStore: getVerifiedAdvice(query)
  Note over FirstAidScreenState,FirstAidStore: Call is made via unawaited and result is discarded

Loading

File-Level Changes

Change	Details	Files
Remove unused Ref fields from WebRtcVoiceCallService and FamilyCircleService constructors and state, while preserving behavior.	WebRtcVoiceCallService constructor updated to take Ref as a positional parameter without storing it, removing the unused _ref field and related ignore lint. FamilyCircleService constructor no longer assigns ref to an instance field, and the unused nullable Ref? _ref field plus ignore lint comment are removed.	lib/services/webrtc_voice_call_service.dart lib/services/family_circle_service.dart
Replace ignore comment for discarded futures in FirstAidScreen with the standard unawaited pattern and tidy imports.	Use unawaited(FirstAidStore.getVerifiedAdvice(query)) instead of a discarded_futures ignore comment, making the intent explicit while satisfying the analyzer. Reorder imports so dart:async appears before package imports to follow Dart style guidelines.	lib/ui/first_aid_screen.dart
Configure localization generation to emit an empty header in the generated localization file.	Add header: "" to l10n.yaml to control the header content of the generated app_localizations.dart.	l10n.yaml

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