first commit

frontend/src/types.ts

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+export interface GpsTelemetry {
+  has_fix: boolean
+  utc_time: string
+  latitude: number | null
+  longitude: number | null
+  satellites: number | null
+  altitude_m: number | null
+  coordinate_system: string
+  source_sentence: string
+  raw_coordinate_format: string
+  source_mode: string
+  updated_at: string
+}
+
+export interface NetworkTelemetry {
+  peer_status: string
+  latency_ms: number
+  jitter_ms: number
+  packet_loss_pct: number
+  tx_kbps: number
+  rx_kbps: number
+  signal_dbm: number
+  transport: string
+  source_mode: string
+  updated_at: string
+}
+
+export interface VideoStatus {
+  available: boolean
+  source_mode: string
+  frame_count: number
+  fps: number
+  frame_dir: string
+  source_detail?: string
+  receiver?: {
+    backend_ready: boolean
+    mode: string
+    connected: boolean
+    has_recent_frame: boolean
+    frames_received: number
+    latest_sequence: number | null
+    last_error: string
+    config_path: string
+    server_addr?: string
+    relay_via?: string
+    peer_id?: string
+    buffer_bytes?: number
+  }
+}
+
+export interface DashboardSnapshot {
+  gps: GpsTelemetry
+  network: NetworkTelemetry
+  video: VideoStatus
+}