fix: clear Metro cache after generating native assets

The asset filenames include a content hash (e.g. icon_svg_a1b2c3) that
must match between the native assets and Metro's asset registry. The
generate step spins up its own Metro instance to discover assets, but
the dev server maintains a separate persistent cache.

When SVG content changes (e.g. after a git rebase), the generate step
produces native assets with new hashes, but a stale dev server cache
can still serve the old hash at runtime, causing "Could not find image"
warnings.

Clearing the Metro cache directory after asset generation forces the
dev server to recompute all asset hashes on next start, ensuring they
match the freshly generated native resources.

Author: Dave Matthews

src/cli/generateAssets.js

@@ -1,4 +1,5 @@
 const fs = require('fs-extra');
+const os = require('os');
 const path = require('path');
 const generateIosAsset = require('./generateIosAsset');
 const generateAndroidAsset = require('./generateAndroidAsset');
@@ -83,6 +84,14 @@ async function generateAssets({
         }
       })
   );
+
+  // Clear Metro's cache after generating native assets so the dev server
+  // recomputes asset hashes to match the regenerated native resources.
+  // Without this, a stale Metro cache can serve an old content hash after
+  // SVG files change (e.g. after a rebase), causing "Could not find image"
+  // warnings at runtime.
+  const metroCacheDir = path.join(os.tmpdir(), 'metro-cache');
+  await fs.remove(metroCacheDir);
 }
 
 module.exports = generateAssets;