refactor: enforce import directions and expose source factories

src/layers/cctv/policy.js

@@ -1,3 +1,10 @@
+export {
+  FRAME_ENDPOINT,
+  SOURCE_ENDPOINT,
+  HEALTH_ENDPOINT,
+  MEDIA_ENDPOINT,
+  ACTIVE_FRAME_REFRESH_MS,
+} from './sourcePolicy.js';
 import * as Cesium from 'cesium';
 import { CCTV_CARD_FETCH_BURST_SPACING_MS } from '../../data/cctvCards.js';
 import { CCTV_AMBIENT_CARD_MAX } from '../../data/cctvLod.js';
@@ -6,14 +13,6 @@ import { CCTV_AMBIENT_CARD_MAX } from '../../data/cctvLod.js';
 // API endpoints
 // ---------------------------------------------------------------------------
 
-export const FRAME_ENDPOINT = '/api/cctv/frame';
-
-export const SOURCE_ENDPOINT = '/api/cctv/sources';
-
-export const HEALTH_ENDPOINT = '/api/cctv/health';
-
-export const MEDIA_ENDPOINT = '/api/cctv/media';
-
 // ---------------------------------------------------------------------------
 // Timing and geometry constants
 // ---------------------------------------------------------------------------
@@ -26,8 +25,6 @@ export const MAX_AUTO_HOP_SEC = 90;
 
 export const HEALTH_SYNC_INTERVAL_MS = 7000;
 
-export const ACTIVE_FRAME_REFRESH_MS = 10000;
-
 export const IDLE_FRAME_REFRESH_MS = 60000;
 
 export const PROJECTION_ACTIVE_REFRESH_MS = 10000;

src/layers/cctv/source.js

@@ -2,7 +2,7 @@ import {
   ACTIVE_FRAME_REFRESH_MS,
   FRAME_ENDPOINT,
   MEDIA_ENDPOINT,
-} from './policy.js';
+} from './sourcePolicy.js';
 function safeNumber(value, fallback = NaN) {
   const n = Number(value);
   return Number.isFinite(n) ? n : fallback;

src/layers/cctv/sourcePolicy.js

@@ -0,0 +1,9 @@
+export const FRAME_ENDPOINT = '/api/cctv/frame';
+
+export const SOURCE_ENDPOINT = '/api/cctv/sources';
+
+export const HEALTH_ENDPOINT = '/api/cctv/health';
+
+export const MEDIA_ENDPOINT = '/api/cctv/media';
+
+export const ACTIVE_FRAME_REFRESH_MS = 10000;