feat: track paywall conversion funnel

[IgorGanapolsky]

Summary

• Track paywall view, offerings unavailable, purchase tap/result, and restore tap/result from Android and iOS.
• Send events to the existing gateway /api/analytics/track endpoint with platform metadata.

Verification

• python3 scripts/check_android_cli.py
• python3 scripts/sync_app_icons.py --check
• ./scripts/check-brand-parity.sh
• ANDROID_HOME=... ANDROID_SDK_ROOT=... ./gradlew :app:compileDebugKotlin :app:testDebugUnitTest :app:lintDebug --no-daemon
• xcodebuild -scheme OpenClawConsole -destination 'generic/platform=iOS Simulator' build
• pre-push verification: release contract, Android guardrails, Android unit/debug build, skills tests (125 passed)

[gemini-code-assist]

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[gemini-code-assist]

Important

Installation incomplete: to start using Gemini Code Assist, please ask the organization owner(s) to visit the Gemini Code Assist Admin Console and sign the Terms of Services.