v0.8.8

What's New

Features

• Update checker — /health endpoint reports when a newer release is available; web UI shows an "Update" badge in the header (5c5c875)
• Prometheus metrics — GET /metrics endpoint exposes request counts, durations, active SSE connections, MQTT messages, ingest pipeline stats, and DB pool metrics (4dca7c6)
• Structured error codes — All API error responses now include a machine-readable code field (e.g. bad_request, not_found, ambiguous_id) for programmatic error handling (e7433e7)
• Network status indicator — Shared header dot shows SSE connection state (green/orange/red) across all 8 live pages (92af58a)
• Scanner audio player enhancements — Playback speed control (0.75x–2x), loading state with pulse animation, error state with clear feedback (83a1586)

Improvements

• Mobile toolbar layout — call-history and events pages now stack controls vertically on narrow screens instead of chaotic flex-wrap (e021ae4)
• API pagination — /calls/{id}/frequencies and /calls/{id}/transmissions support limit/offset
• Time validation — All time-range endpoints return 400 when start_time > end_time
• Health endpoint — Now includes DB connection pool stats (total/idle/in-use/max)
• Database indexes — 3 new indexes for common query patterns
• Favicon — Added site favicon

API Changes

• Error responses now include code field (backward compatible — error field unchanged)
• OpenAPI spec updated with error code enum on Error and AmbiguousError schemas
• New endpoints: GET /metrics (Prometheus), enhanced GET /health (update check + pool stats)