chore: drop exports nothing imports

Knip, configured with the application, package exports, scripts, QA
harnesses, workers, tools and tests as entry points, reports exports
that no module imports. Each was checked by hand against string-based
and namespace imports.

- Symbols that are still used inside their own module lose only the
  `export` keyword (176 constants and helpers).
- Unused re-exports are removed from barrel modules (flight, military,
  vessel, CCTV, directions, transit history, local ADS-B and street-level
  policy modules).
- Declarations that nothing uses at all are deleted, among them
  AIS_WATCHDOG_STATUSES, applyFilter, isRadioCountryCode, compactText,
  DENSITY_STOPS, the unused CCTV endpoint constants, and the SDR band
  constants.
- Default exports that nothing imports are removed. The ones in
  src/data/earthquakes.js, src/data/telegeographySubmarineCables.js,
  src/data/wind.js and src/data/bhoteKoshiLocator.js each constructed a
  layer instance at import time that nothing used; those instances are
  no longer created.

Every export of a package.json entry stays, as does TOMTOM_CREDIT,
which the traffic layer reads from the credits namespace it is given.

server/providers/cctv/constants.js

@@ -18,7 +18,7 @@ export const CCTV_MAX_SOURCES_CEILING = 5000;
 export const AUSTIN_DOWNTOWN = { lat: 30.2672, lon: -97.7431 };
 /** Caltrans CCTV: one JSON feed per district, identical schema statewide. */
 /** TxDOT ITS: one keyless JSON catalog per district (25 districts statewide). */
-export const TXDOT_ORIGIN = 'https://its.txdot.gov';
+const TXDOT_ORIGIN = 'https://its.txdot.gov';
 export const TXDOT_CCTV_STATUS_URL = (district) =>
   `${TXDOT_ORIGIN}/its/DistrictIts/GetCctvStatusListByDistrict?districtCode=${encodeURIComponent(district)}`;
 /** Per-camera frame. Returns JSON `{snippet:<base64 jpeg>}`, not an image body;

server/providers/cctv/groundHeights.js

@@ -3,7 +3,7 @@ import path from 'node:path';
 import { poseHash } from '../../../src/data/cctvFootprint.js';
 
 /** Sidecar written by scripts/precompute-cctv-heights.mjs. */
-export const DEFAULT_GROUND_HEIGHTS_FILE =
+const DEFAULT_GROUND_HEIGHTS_FILE =
   'src/data/local_data/cctv_ground_heights/cctv_ground_heights.json';
 
 /** @type {{path:string, mtimeMs:number, cameras:object}|null} */

server/providers/cctv/media.js

@@ -92,7 +92,7 @@ export function buildSyntheticCctvSvg({ cameraId, label, city, status }) {
  * @param {ReadableStream|NodeJS.ReadableStream|null} body
  * @returns {import('stream').Readable|null}
  */
-export function toReadable(body) {
+function toReadable(body) {
   if (!body) return null;
   if (typeof body.pipe === 'function') return body;
   if (typeof body.getReader === 'function') {
@@ -108,7 +108,7 @@ export function toReadable(body) {
  * @returns {{essence:string,params:Map<string,string>}|null} Null when the
  *   value is missing or is not a `type/subtype` media type.
  */
-export function parseMediaType(value) {
+function parseMediaType(value) {
   const [head, ...rest] = String(value ?? '').split(';');
   const essence = head.trim().toLowerCase();
   if (!/^[a-z0-9!#$&^_.+-]+\/[a-z0-9!#$&^_.+-]+$/.test(essence)) return null;

server/providers/cctv/normalize.js

@@ -64,7 +64,7 @@ export function toFiniteNumber(value, fallback = NaN) {
  * @param {string} text
  * @returns {string}
  */
-export function normalizeKey(text) {
+function normalizeKey(text) {
   return String(text || '')
     .trim()
     .toLowerCase()
@@ -80,7 +80,7 @@ export function normalizeKey(text) {
  * @param {string} value
  * @returns {{lat:number, lon:number}}
  */
-export function parsePointString(value) {
+function parsePointString(value) {
   const match = String(value || '').match(
     /POINT\s*\(\s*(-?\d+(?:\.\d+)?)\s+(-?\d+(?:\.\d+)?)\s*\)/i,
   );
@@ -100,7 +100,7 @@ export function parsePointString(value) {
  * @param {string|object|null} value
  * @returns {{lat:number, lon:number}}
  */
-export function coerceLatLon(value) {
+function coerceLatLon(value) {
   if (!value) return { lat: NaN, lon: NaN };
 
   if (typeof value === 'string') {

server/providers/cctv/sources.js

@@ -1868,7 +1868,7 @@ export function normalizeCataloniaImageUrl(rawUrl) {
  * @param {string} imageUrl - A URL normalizeCataloniaImageUrl accepted.
  * @returns {string}
  */
-export function cataloniaCameraId(imageUrl) {
+function cataloniaCameraId(imageUrl) {
   const parsed = new URL(imageUrl);
   const slug = (text) =>
     text

server/providers/cctv/stream.js

@@ -70,7 +70,7 @@ export async function fetchHlsBytes(
   }
 }
 
-export function sameOriginHlsUrl(value, base) {
+function sameOriginHlsUrl(value, base) {
   const url = new URL(value, base);
   if (
     !['https:', 'http:'].includes(url.protocol) ||

server/providers/cctv/taiwan.js

@@ -12,14 +12,14 @@ export const TAIWAN_FREEWAY_CCTV_URL =
   'https://tisvcloud.freeway.gov.tw/history/motc20/CCTV.xml';
 /** The whole network is ~1.2 MB. */
 export const TAIWAN_MAX_CATALOG_BYTES = 6 * 1024 * 1024;
-export const DEFAULT_TAIWAN_MAX_SOURCES = 600;
+const DEFAULT_TAIWAN_MAX_SOURCES = 600;
 /** After a failed download, wait this long before asking again. The catalog
  * host does not answer from some networks outside Taiwan, and every attempt
  * there holds the shared catalog refresh until the connect timeout. */
 export const TAIWAN_RETRY_AFTER_FAILURE_MS = 60 * 60 * 1000;
 /** The table is republished daily; a good copy stands in for a failed
  * download for up to this long. */
-export const TAIWAN_LAST_GOOD_MAX_AGE_MS = 24 * 60 * 60 * 1000;
+const TAIWAN_LAST_GOOD_MAX_AGE_MS = 24 * 60 * 60 * 1000;
 
 // The table publishes each camera's MJPEG stream. The same camera servers
 // answer a single JPEG for the same camera ID on a sibling path, which is what
@@ -50,7 +50,7 @@ const ANCHORS = [
 
 /** Taiwan main island with slack for the coast; the freeway network has no
  * offshore-island cameras. */
-export function isLikelyTaiwanCoordinate(lat, lon) {
+function isLikelyTaiwanCoordinate(lat, lon) {
   return (
     Number.isFinite(lat) &&
     Number.isFinite(lon) &&

server/providers/local-receivers.js

@@ -27,13 +27,13 @@ import { normalizeDump1090Aircraft } from '../../src/sources/adsbRecords.js';
  */
 
 export const LOCAL_RECEIVERS_ROUTE = '/api/local-receivers/aircraft';
-export const LOCAL_RECEIVER_FEEDS_ENV = 'LOCAL_RECEIVER_FEEDS';
-export const LOCAL_RECEIVER_BANDS = Object.freeze(['1090', '978']);
-export const LOCAL_RECEIVER_TIMEOUT_MS = 2_000;
-export const LOCAL_RECEIVER_MAX_BODY_BYTES = 2 * 1024 * 1024;
-export const LOCAL_RECEIVER_CACHE_MS = 1_000;
+const LOCAL_RECEIVER_FEEDS_ENV = 'LOCAL_RECEIVER_FEEDS';
+const LOCAL_RECEIVER_BANDS = Object.freeze(['1090', '978']);
+const LOCAL_RECEIVER_TIMEOUT_MS = 2_000;
+const LOCAL_RECEIVER_MAX_BODY_BYTES = 2 * 1024 * 1024;
+const LOCAL_RECEIVER_CACHE_MS = 1_000;
 /** A feed whose own `now` is older than this is reported stale. */
-export const LOCAL_RECEIVER_STALE_MS = 10_000;
+const LOCAL_RECEIVER_STALE_MS = 10_000;
 const MAX_FEEDS = 8;
 const LOG_PREFIX = '[local-receivers]';
 
@@ -139,7 +139,7 @@ class FeedError extends Error {
  * @param {string} address Resolved IP address.
  * @returns {boolean}
  */
-export function isLocalReceiverAddress(address) {
+function isLocalReceiverAddress(address) {
   const value = String(address || '').toLowerCase();
   if (value === '::1') return true;
   const mapped = /^::ffff:(\d{1,3}(?:\.\d{1,3}){3})$/.exec(value);
@@ -152,7 +152,7 @@ export function isLocalReceiverAddress(address) {
  * @param {typeof dnsLookup} lookupImpl `dns.promises.lookup`-compatible.
  * @returns {Promise<Array<{address:string, family:number}>>}
  */
-export async function resolveLocalReceiverAddresses(hostname, lookupImpl) {
+async function resolveLocalReceiverAddresses(hostname, lookupImpl) {
   let resolved;
   try {
     resolved = await lookupImpl(hostname, { all: true, verbatim: true });
@@ -274,7 +274,7 @@ function fetchLocalReceiverFeed(url, options) {
  * @param {object} options
  * @returns {Promise<object>} Parsed JSON document.
  */
-export async function fetchLocalReceiverDocument(
+async function fetchLocalReceiverDocument(
   url,
   {
     fetchImpl = fetchLocalReceiverFeed,

server/providers/mapillary/tiles.js

@@ -42,7 +42,7 @@ export class TileUpstreamError extends Error {
 }
 
 /** Seconds a Retry-After header asks for (an integer or an HTTP date), else null. */
-export function retryAfterSeconds(header, now = Date.now()) {
+function retryAfterSeconds(header, now = Date.now()) {
   const text = String(header ?? '').trim();
   if (!text) return null;
   const seconds = /^\d+$/.test(text)

server/providers/openai/codex-auth.js

@@ -145,7 +145,7 @@ const CODEX_LOGIN_ENV =
   /^(?:PATH|PATHEXT|HOME|USER|USERNAME|LOGNAME|SHELL|LANG|LANGUAGE|LC_[A-Z_]+|TERM|TZ|TMPDIR|TEMP|TMP|XDG_[A-Z_]+|DISPLAY|WAYLAND_DISPLAY|DBUS_SESSION_BUS_ADDRESS|BROWSER|WSL_[A-Z_]+|WSLENV|(?:HTTPS?|ALL|NO)_PROXY|SSL_CERT_(?:FILE|DIR)|NODE_EXTRA_CA_CERTS|SYSTEMROOT|WINDIR|COMSPEC|USERPROFILE|APPDATA|LOCALAPPDATA|PROGRAMDATA|HOMEDRIVE|HOMEPATH|CODEX_[A-Z_]+)$/i;
 
 /** The environment `codex login` runs with: the allowlist, then `CODEX_HOME`. */
-export function codexLoginEnvironment(environment, codexHome) {
+function codexLoginEnvironment(environment, codexHome) {
   const env = {};
   for (const [name, value] of Object.entries(environment || {}))
     if (CODEX_LOGIN_ENV.test(name) && value !== undefined) env[name] = value;

server/providers/openai/debug-log.js

@@ -157,4 +157,4 @@ function createDebugLogHandler({
   };
 }
 
-export { createDebugLogHandler, omitVoiceContent };
+export { createDebugLogHandler };

server/providers/radio/catalog.js

@@ -26,7 +26,7 @@ import {
   RADIO_UUID_RE,
   RADIO_FALLBACK_MIRRORS,
 } from './constants.js';
-export async function mapRadioConcurrent(values, concurrency, mapper) {
+async function mapRadioConcurrent(values, concurrency, mapper) {
   const results = new Array(values.length);
   let cursor = 0;
   const workers = Array.from(

server/providers/transitHistory.js

@@ -1,5 +1,4 @@
 export {
   createTransitHistory,
-  TRANSIT_HISTORY_LIMITS,
   validTransitIdentifier,
 } from '../../src/sources/transitHistoryStore.js';

server/providers/wind/ifs.js

@@ -3,7 +3,7 @@ import { decodeWindGribMessage } from './decode.js';
 import { resampleWeatherSnapshot, weatherScalarMetadata } from './grid.js';
 
 /** Keyless ECMWF Open Data root for real-time IFS forecasts. */
-export const IFS_BASE = 'https://data.ecmwf.int/forecasts';
+const IFS_BASE = 'https://data.ecmwf.int/forecasts';
 
 /**
  * Select the latest IFS cycle that should be available.