Standardize CI signing config and clean up Android build files:
- Replace app-specific CodeMagic keystore env vars (CM_KEYSTORE_PATH_CLIENT/STAFF, CM_KEYSTORE_PASSWORD_CLIENT/STAFF, CM_KEY_ALIAS_CLIENT/STAFF, CM_KEY_PASSWORD_CLIENT/STAFF) with shared variables (CM_KEYSTORE_PATH, CM_KEYSTORE_PASSWORD, CM_KEY_ALIAS, CM_KEY_PASSWORD) in client and staff build.gradle.kts to unify CI configuration.
- Remove stray TODO comment about applicationId in both build files (cleanup).
- Adjust manifestPlaceholders placement in the client build file.
- Delete a backup google-services.json_back from the staff app to remove an unnecessary/sensitive artifact.
- Updated ActionsWidget, CoverageWidget, SpendingWidget, ReorderWidget, and LiveActivityWidget to utilize SectionLayout for consistent layout structure.
- Introduced SectionHeader for displaying titles and optional actions in sections.
- Added ClientHomeBody, ClientHomeEditModeBody, ClientHomeNormalModeBody, and ClientHomeErrorState for improved state management and UI separation.
- Enhanced dashboard widget builder to support edit mode and error handling.
- Updated import paths for home_cubit.dart to reflect new structure.
- Introduced BenefitsOverviewCubit to manage benefits overview page state.
- Created BenefitsOverviewState to handle loading, loaded, and error states for benefits.
- Implemented HomeCubit to manage home page state, including shifts and benefits.
- Added new widgets for benefits overview: BenefitCard, BenefitCardHeader, AccordionHistory, ComplianceBanner, StatChip, and BenefitsOverviewBody.
- Implemented custom painter for circular progress indicators.
- Enhanced UI components for displaying benefits and their statuses.
- Added benefits section with state management
- Refactored home page to include new sections for quick actions, today's shifts, and tomorrow's shifts
- Introduced full-width divider for better layout
- Created reusable section layout widget for consistent UI
- Implemented circular progress indicator for benefits
- Removed deprecated benefits widget and replaced with new structure
- Updated data connection configuration for validation environment
