Refine telemetry-driven HUD and fitness feedback

miniprogram/game/telemetry/telemetryState.ts

@@ -0,0 +1,40 @@
+import { type LonLatPoint } from '../../utils/projection'
+import { type GameSessionStatus } from '../core/gameSessionState'
+
+export interface TelemetryState {
+  sessionStatus: GameSessionStatus
+  sessionStartedAt: number | null
+  sessionEndedAt: number | null
+  elapsedMs: number
+  distanceMeters: number
+  currentSpeedKmh: number | null
+  averageSpeedKmh: number | null
+  distanceToTargetMeters: number | null
+  targetControlId: string | null
+  targetPoint: LonLatPoint | null
+  lastGpsPoint: LonLatPoint | null
+  lastGpsAt: number | null
+  lastGpsAccuracyMeters: number | null
+  heartRateBpm: number | null
+  caloriesKcal: number | null
+  calorieTrackingAt: number | null
+}
+
+export const EMPTY_TELEMETRY_STATE: TelemetryState = {
+  sessionStatus: 'idle',
+  sessionStartedAt: null,
+  sessionEndedAt: null,
+  elapsedMs: 0,
+  distanceMeters: 0,
+  currentSpeedKmh: null,
+  averageSpeedKmh: null,
+  distanceToTargetMeters: null,
+  targetControlId: null,
+  targetPoint: null,
+  lastGpsPoint: null,
+  lastGpsAt: null,
+  lastGpsAccuracyMeters: null,
+  heartRateBpm: null,
+  caloriesKcal: null,
+  calorieTrackingAt: null,
+}