chore: drop unused exports from modules QA harnesses load

QA harnesses import some modules in the page by path, for example
import('/src/data/radio.js'). Those calls name exactly which bindings
they use, and every other export of these modules has no importer:

- src/data/radio.js: 20 aliases of radio layer methods and two
  re-exported altitude constants. The radio layer keeps the methods.
- src/layers/transit/movement.js: tuning constants and course helpers
  used only inside the module lose `export`; FIX_HISTORY_MAX,
  DISPLAY_LAG_MIN_MS, DISPLAY_LAG_RESET_MS, FIX_NOISE_M, STOPPED_FIXES
  and courseBetween, which nothing reads, are deleted.
- src/overlays/worldOverlay.js, src/splitFlap.js,
  src/data/contactPlayback.js and src/voice/cloudVoiceAuth.js: helpers
  and constants used only locally lose `export`.

src/data/contactPlayback.js

@@ -181,7 +181,7 @@ export function trimTrack(track, nowMs, keep = track.capacity) {
   for (const id of track.epochs.keys())
     if (!used.has(id)) track.epochs.delete(id);
 }
-export function validFix(fix) {
+function validFix(fix) {
   return (
     Number.isFinite(fix?.t) &&
     fix.t >= 0 &&

src/data/radio.js

@@ -49,34 +49,12 @@ export const buildRadioTunerBand = layer.buildRadioTunerBand;
 export const radioTuningStaticShouldPlay = layer.radioTuningStaticShouldPlay;
 export const getRadioAcceptedCatalogSnapshot =
   layer.getRadioAcceptedCatalogSnapshot;
-export const radioStationResolutionMatches =
-  layer.radioStationResolutionMatches;
 export const getRadioUIState = layer.getRadioUIState;
-export const subscribeToRadio = layer.subscribeToRadio;
-export const subscribeToRadioPlaybackControls =
-  layer.subscribeToRadioPlaybackControls;
-export const getRadioTunerStations = layer.getRadioTunerStations;
-export const beginRadioTuning = layer.beginRadioTuning;
-export const setRadioTuningStatic = layer.setRadioTuningStatic;
 export const radioCameraNavigationAllowed = layer.radioCameraNavigationAllowed;
-export const previewRadioTuningStation = layer.previewRadioTuningStation;
-export const endRadioTuning = layer.endRadioTuning;
-export const cancelRadioTuning = layer.cancelRadioTuning;
-export const commitRadioTuningStation = layer.commitRadioTuningStation;
-export const playSelectedRadio = layer.playSelectedRadio;
 export const confirmRadioPlayback = layer.confirmRadioPlayback;
-export const playPreparedRadioForVoice = layer.playPreparedRadioForVoice;
-export const stopRadioPlayback = layer.stopRadioPlayback;
-export const toggleRadioPlayback = layer.toggleRadioPlayback;
-export const pauseRadioPlayback = layer.pauseRadioPlayback;
 export const setRadioVolume = layer.setRadioVolume;
 export const setRadioParams = layer.setRadioParams;
-export const getRadioParams = layer.getRadioParams;
 export const setRadioVoiceDucking = layer.setRadioVoiceDucking;
-export const selectRadioStation = layer.selectRadioStation;
-export const cycleRadioStation = layer.cycleRadioStation;
-export const selectRequestedRadioStation = layer.selectRequestedRadioStation;
-export const setRadioFilter = layer.setRadioFilter;
 export const retainRadioClusterIdentitiesForStations =
   layer.retainRadioClusterIdentitiesForStations;
 export {
@@ -86,10 +64,8 @@ export {
   RADIO_SINGLETON_MID_LIMIT,
   RADIO_SINGLETON_NEAR_LIMIT,
   RADIO_GLOBE_INTERACTION_MAX_DISTANCE_M,
-  RADIO_GLOBE_RECENTER_MAX_HEIGHT_M,
   RADIO_OVERLAY_SOURCE_OPTIONS,
   DEFAULT_RADIO_FILTER,
-  GLOBAL_RADIO_ALTITUDE_M,
 } from '../layers/radio/index.js';
 export default layer;
 

src/layers/transit/movement.js

@@ -9,10 +9,7 @@ import {
   correctHeight,
   setTimeOffsetMs,
 } from '../../data/contactPlayback.js';
-export const FIX_HISTORY_MAX = 128;
-export const DISPLAY_LAG_MIN_MS = 25_000;
-export const DISPLAY_LAG_RESET_MS = 90_000;
-export const MODE_MAX_SPEED_MPS = Object.freeze({
+const MODE_MAX_SPEED_MPS = Object.freeze({
   bus: 36, // ~130 km/h — a coach on a motorway
   tram: 28, // ~100 km/h — interurban light rail
   subway: 42, // ~150 km/h
@@ -32,22 +29,19 @@ export const MODE_MAX_SPEED_MPS = Object.freeze({
  * @param {boolean} [inferred] Whether the mode came from a feed default.
  * @returns {number} m/s
  */
-export function speedCeilingMps(mode, inferred = false) {
+function speedCeilingMps(mode, inferred = false) {
   if (inferred) return MODE_MAX_SPEED_MPS.unknown;
   return MODE_MAX_SPEED_MPS[mode] ?? MODE_MAX_SPEED_MPS.unknown;
 }
 
-/** Position deadband is disabled: even a short reported crawl is played. */
-export const FIX_NOISE_M = 0;
-
 /**
  * Displacement (m) a glide must cover before its direction is worth believing.
  * Below this the course derived from it is noise; the last good one is held.
  */
-export const COURSE_MIN_TRAVEL_M = 12;
+const COURSE_MIN_TRAVEL_M = 12;
 
 /** Maximum display-course change per second (deg). A bus is not a gyroscope. */
-export const COURSE_MAX_RATE_DEG_PER_S = 120;
+const COURSE_MAX_RATE_DEG_PER_S = 120;
 /**
  * Longest stretch of elapsed time (s) one evaluation may spend. The limiter
  * used to bank the time since the course last CHANGED, so a vehicle that held
@@ -56,15 +50,7 @@ export const COURSE_MAX_RATE_DEG_PER_S = 120;
  * EVALUATED, and capped here so that even a first look after a long idle
  * sweeps visibly instead of snapping.
  */
-export const COURSE_STEP_MAX_S = 0.25;
-
-/**
- * Consecutive fixes at the same place before a vehicle is called STOPPED.
- * One is not enough: a fifteen-second gap between identical fixes is also what
- * a vehicle waiting at a light looks like, and so is a feed that repeated
- * itself.
- */
-export const STOPPED_FIXES = 2;
+const COURSE_STEP_MAX_S = 0.25;
 
 /**
  * How long after its newest fix a vehicle stops being described as travelling.
@@ -75,7 +61,7 @@ export const STOPPED_FIXES = 2;
  * otherwise is the same overreach as reading STOPPED off a stale status. Ninety
  * seconds matches the threshold at which a whole feed reads as gone quiet.
  */
-export const MOTION_UNKNOWN_AFTER_MS = 90_000;
+const MOTION_UNKNOWN_AFTER_MS = 90_000;
 
 const EARTH_M_PER_DEG = 111_320;
 
@@ -94,29 +80,13 @@ export function fixDistanceM(a, b) {
   return Math.hypot(dLat, dLon);
 }
 
-/**
- * Course in degrees clockwise from north, from one point to another.
- * @param {{lat:number, lon:number}} from
- * @param {{lat:number, lon:number}} to
- * @returns {number} 0-360
- */
-export function courseBetween(from, to) {
-  const dLat = (to.lat - from.lat) * EARTH_M_PER_DEG;
-  const dLon =
-    (to.lon - from.lon) *
-    EARTH_M_PER_DEG *
-    Math.cos((from.lat * Math.PI) / 180);
-  const deg = (Math.atan2(dLon, dLat) * 180) / Math.PI;
-  return (deg + 360) % 360;
-}
-
 /**
  * Shortest signed difference between two courses, in degrees (-180, 180].
  * @param {number} from
  * @param {number} to
  * @returns {number}
  */
-export function courseDelta(from, to) {
+function courseDelta(from, to) {
   let delta = ((to - from + 540) % 360) - 180;
   if (delta === -180) delta = 180;
   return delta;
@@ -259,7 +229,7 @@ export function attachFloorToPlace(entry, fix, heightM) {
       correctHeight(entry.track, scratch.seq, heightM);
   }
 }
-export function displayCourse(entry, nowMs) {
+function displayCourse(entry, nowMs) {
   if (!entry) return null;
   const target = Number.isFinite(entry.sample?.segmentCourseDeg)
     ? entry.sample.segmentCourseDeg

src/overlays/worldOverlay.js

@@ -1155,11 +1155,7 @@ export function isOverlayPointVisible(
  * Return true when a rectangle intersects any cached UI exclusion box.
  * `count` lets pooled buffers expose a live prefix without truncating.
  */
-export function overlayRectIntersectsAny(
-  rect,
-  exclusions,
-  count = exclusions.length,
-) {
+function overlayRectIntersectsAny(rect, exclusions, count = exclusions.length) {
   for (let i = 0; i < count; i++) {
     const other = exclusions[i];
     if (
@@ -1177,7 +1173,7 @@ export function overlayRectIntersectsAny(
  * Like `overlayRectIntersectsAny`, but only against exclusions that composite
  * BELOW the host — the ones a placement may never overlap at any cost.
  */
-export function overlayRectIntersectsAnyHard(
+function overlayRectIntersectsAnyHard(
   rect,
   exclusions,
   count = exclusions.length,

src/splitFlap.js

@@ -72,7 +72,7 @@ export const FLAP_STAGGER_MS = 26;
  */
 export const FLAP_MAX_TOTAL_MS = 620;
 /** Slack after the last character lands before the cells are stripped. */
-export const FLAP_SETTLE_SLACK_MS = 60;
+const FLAP_SETTLE_SLACK_MS = 60;
 /**
  * Fraction of a character's flip at which the outgoing glyph has rotated
  * away and the incoming one takes over as what the eye reads. MUST track the

src/voice/cloudVoiceAuth.js

@@ -1,5 +1,5 @@
-export const CLOUD_VOICE_AUTH_MODES = Object.freeze(['api-key', 'oauth']);
-export const DEFAULT_CLOUD_VOICE_AUTH_MODE = 'api-key';
+const CLOUD_VOICE_AUTH_MODES = Object.freeze(['api-key', 'oauth']);
+const DEFAULT_CLOUD_VOICE_AUTH_MODE = 'api-key';
 export const CLOUD_VOICE_AUTH_STORAGE_KEY = 'godsEyeView.voice.cloudAuth';
 
 function storageRef(storage) {
@@ -11,7 +11,7 @@ function storageRef(storage) {
   }
 }
 
-export function normalizeCloudVoiceAuthMode(mode) {
+function normalizeCloudVoiceAuthMode(mode) {
   const normalized = String(mode || '')
     .trim()
     .toLowerCase();