feat(sdr): local receivers — browser RTL-SDR, Local ADS-B layer and decoder feeds (#732)

Adds a Local ADS-B layer fed by your own receivers: a browser WebUSB
RTL-SDR (with FM listening) and local 1090/978 MHz decoder feeds
(LOCAL_RECEIVER_FEEDS, local and private addresses only). Local aircraft
draw in magenta with class, silhouettes, 3D models, trails and a position
sanity filter; the click card names the band and input that heard them.

Builds on Sameh Khamis's SDR prototype and the initial GEV port by
Mazeyar Moeini Feizabadi (#134); the decoder-feed design follows the
notes on #57. Closes #57.

Co-authored-by: Sameh Khamis <[email protected]>
Co-authored-by: Mazeyar Moeini Feizabadi <[email protected]>

scripts/check-package-boundaries.mjs

@@ -89,6 +89,10 @@ export async function checkPackageBoundaries(root) {
     const seen = new Set();
     await build({
       root,
+      // Keep this gate out of a running dev server's dependency cache
+      // (node_modules/.vite): a build there re-optimizes dependencies and the
+      // dev server's workers then fail with 504 "Outdated Optimize Dep".
+      cacheDir: path.join(root, 'node_modules/.vite-boundaries'),
       configFile: false,
       envFile: false,
       publicDir: false,
@@ -115,7 +119,12 @@ export async function checkPackageBoundaries(root) {
         assetsInlineLimit: 0,
         rollupOptions: {
           input,
-          external: group.external,
+          // A declared dependency also owns its package subpath exports
+          // (for example `@jtarrio/webrtlsdr/rtlsdr.js`).
+          external: (id) =>
+            group.external.some(
+              (name) => id === name || id.startsWith(`${name}/`),
+            ),
           // Unused imports must still obey ownership; tree shaking is not a boundary.
           treeshake: false,
           preserveEntrySignatures: 'strict',