Respect xCloud title entitlements

[davidcollom]

Fixes #1514

Cause

The authenticated /v2/titles response already includes details.hasEntitlement, but Greenlight declares the field in TitleDetails and then drops it when constructing its Title objects. As a result, both the library and title information page offer to start titles the signed-in user cannot play.

Changes

• retain hasEntitlement from the existing title response; no additional API request is introduced
• grey out unentitled library tiles while keeping them visible by default
• add a persisted Streaming setting to show or hide games that require purchase
• apply the preference to the full library, searches, and recently-added titles
• route visible unentitled tiles to the information page instead of starting a stream
• replace the Stream button with a disabled, localized Purchase required button
• reject direct stream attempts for known-unentitled cloud titles before session creation
• add the new labels to English, German, Spanish, Russian, and Ukrainian translations

Undefined entitlement values remain playable for backwards compatibility; only an explicit false is blocked. The visibility setting defaults to enabled to preserve the current catalogue view.

Validation

• yarn desktop lint (passes; generated Next.js output emits five pre-existing warnings after a build)
• yarn desktop build --no-pack (passes, including TypeScript and production renderer/main builds)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[unknownskl]

Thanks for the contribution. I will check the pr this week asap.