Fix stale disc file ID in localStorage causing 404 on ROM play after rescan

[Copilot]

After rescanning ROMs (e.g. when changing the library path), RomFile records are recreated with new IDs. The previously persisted disc selection in localStorage (player:{romId}:disc) becomes stale, causing the player to pass an invalid ?file_ids= to /api/roms/{id}/content/{name} — resulting in a 404.

Changes

• views/Player/EmulatorJS/Base.vue — Validate the stored disc ID against the ROM's actual file list before using it. If stale, remove the key from localStorage and fall back to the first available file.
• console/views/Play.vue — Same validation before constructing EJS_gameUrl. Clears playerStorage.disc if the stored ID no longer maps to a real file.

// Before: blindly trusted localStorage
const discId = playerStorage.disc.value ? parseInt(playerStorage.disc.value) : null;

// After: validate against actual files
const storedDiscId = playerStorage.disc.value ? parseInt(playerStorage.disc.value) : null;
const validDiscId =
  storedDiscId && rom.files.some((f) => f.id === storedDiscId) ? storedDiscId : null;
if (storedDiscId && !validDiscId) playerStorage.disc.value = null;

[Copilot]

Pull request overview

Validates persisted disc selections in localStorage against the ROM's current file list before use, preventing 404 errors when stale IDs remain after a rescan recreates RomFile records.

Changes:

• Validate stored disc ID in EmulatorJS Base.vue and clear it from localStorage if no longer valid.
• Apply the same validation and cleanup in console/views/Play.vue before constructing EJS_gameUrl.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
frontend/src/views/Player/EmulatorJS/Base.vue	Falls back to first file and removes stale localStorage key when stored disc ID is not in rom.files.
frontend/src/console/views/Play.vue	Computes a validDiscId and clears playerStorage.disc when the stored ID is stale.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.