The original title is about a technical design proposal for upload expiration as a recoverable state. Let me rewrite this for a mobile feed.

Short summary

Proposes treating upload expiration as an explicit, recoverable state rather than a generic failure. Separate deadlines for event windows, upload intents, and storage credentials should each return server time so clients can act without trusting local clocks. Renewal endpoints should verify continuity, recheck policy, and reconcile committed parts before issuing new credentials, with bounded renewal limits and clear UI messaging.

• •Separate three deadlines: event window, upload intent expiry, and credential expiry — each with its own timestamp
• •Renewal endpoints must recheck event state, file policy, rate limits, and committed parts before issuing new credentials
• •Client timers are advisory; never delete server state based on browser timer events alone

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