Backend changes: - Add SoraHandler for admin Sora management APIs - GET /api/v1/admin/sora/stats - system statistics - GET /api/v1/admin/sora/users - user storage stats - GET /api/v1/admin/sora/generations - generation records - DELETE /api/v1/admin/sora/users/:id/storage - clear user storage - Add sora_storage_quota_bytes to AdminUser DTO - Add SoraStorageQuotaBytes to UpdateUserInput for admin user updates - Add comprehensive tests for SoraHandler Frontend changes: - Add soraAdminAPI for Sora management - Add sora_storage_quota_bytes and sora_storage_used_bytes to AdminUser type - Add Sora storage quota field to UserEditModal (GB unit) - Fix UsageLog type: add media_type, fix duration_ms to optional - Fix AdminUsageLog type: add channel_id, billing_tier Test fixes: - Add window.matchMedia mock to AccountUsageCell.spec.ts - Add tlsFingerprintProfileAPI mock to EditAccountModal.spec.ts - Fix loadTLSProfiles function order in EditAccountModal.vue - Fix translation key references in AccountStatusIndicator.spec.ts