feat(settings): add per-game stream quality profiles

[zortos293]

Summary

Requested by Discord user <@290219074103803904> (trvke).

• adds a per-game stream quality editor to game details using the existing resolution, FPS, and maximum bitrate controls
• persists profiles by stable catalog game ID and applies them to new launches, resumed sessions, recovery claims, WebRTC offers, and native input activation
• preserves the global stream profile for every game without an override, with an explicit one-click reset back to the global default
• normalizes malformed persisted profiles and keeps entitlement resolution/FPS fallback behavior intact

Visual proof

Screenshots were captured from the running Electron renderer with a local catalog preview because this environment has no NVIDIA/GFN account credentials. The preview uses the shipped game-detail modal and profile controls; no preview-only code is included in the change.

Global fallback

Custom game profile

Verification

• npm test — 451 passed
• npm run typecheck
• npm run lint — 0 warnings, 0 errors
• npm run locales:check
• npm run build

Limitations

A live GFN game launch could not be completed without account credentials. Per-game overrides intentionally cover only the quality controls OpenNOW already exposes together as its quality profile: resolution, FPS, and stream maximum bitrate.

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