feat: update whats new section of app

[apedley]

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Description

This PR adds the chatbot and liquid glass look items to the whats new screen. Liquid glass is gated behind canUseLiquidGlass
Updated native tab bar icons to match the custom icons.
Changed version number for a major release - 1.5.0

Linked Issue: Closes #

How to Test

1. Navigate to whats new
2. See new sections

PR Type

• Issue (bug fix)
• New Feature
• Refactor
• Documentation

Checklist

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• [MANDATORY - ALL] Integrity & License: I certify this is my own work, free of malicious code, and I agree to the License terms.

New features only:

• [MANDATORY for new feature] Alignment: I have raised a GitHub issue and it was reviewed/approved by maintainers or it was approved on Discord.

Frontend changes (SparkyFitnessFrontend/):

• [MANDATORY for Frontend changes] Quality: I have run pnpm run validate and it passes.
• [MANDATORY for Frontend changes] Translations: I have only updated the English (en) translation file.

Backend changes (SparkyFitnessServer/):

• [MANDATORY for Backend changes] Code Quality: I have run typecheck, lint, and tests. New files use TypeScript, new endpoints have Zod schemas, and new endpoints include tests.
• [MANDATORY for Backend changes] Database Security: I have updated rls_policies.sql for any new user-specific tables.

UI changes (components, screens, pages):

• [MANDATORY for UI changes] Screenshots: I have attached Before/After screenshots below.

Mobile changes (SparkyFitnessMobile/):

• [MANDATORY for Mobile changes] Tested on device or emulator: I have verified the changes work on iOS or Android.

Screenshots

Click to expand

Before

After

Notes for Reviewers

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[github-actions]

PR Validation Results

Change Detection

• 📱 Mobile changes detected

⚠️ Recommendations (1)

• Please link a related GitHub issue (Linked Issue: Closes #123).

✅ All required checks passed.

[gemini-code-assist]

Code Review

This pull request updates the app version to 1.5.0, transitions tab bar icons to filled variants, and adds new feature cards to the "What's New" screen, including an AI coach chat mockup and a Liquid Glass mockup for iOS 26+. It also replaces the CTA buttons with custom pressable elements. The review feedback suggests improving the Liquid Glass mockup to support dark mode by replacing hardcoded colors with theme-aware variables, and adding visual feedback (such as opacity changes) to the new pressable CTA components.

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