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1. nostr-identity.js: _scanExistingNostrKeys() discovers pre-existing Nostr keys in localStorage using common patterns: nsec1/npub1 bech32, raw hex privkey, JSON objects with nsec/npub/privkey fields. Scans common client key names (nostr_privkey, privkey, nsec, nostr-nsec, nostrKeys, etc.) before showing the identity prompt. Keys discovered are re-saved in app format for next load. 2. ui.js: _fetchEstimate() now sends nostr_token as X-Nostr-Token header instead of query param, consistent with all other authenticated API calls. 3. edge-worker.js: explicit env.useBrowserCache=true + env.allowLocalModels=false so model weights are cached in browser Cache API after first download.