Clarify local file read and media allowlist intent

electron/ipc/project/manager.ts

@@ -90,8 +90,10 @@ export function isAllowedLocalReadPath(candidatePath: string) {
 	);
 }
 
-// Keep media-server access rules aligned with read-local-file so exported videos
-// saved outside the active recording session can still be reopened in the editor.
+// Keep loopback media-server access restricted to allowlisted or explicitly
+// approved files. Direct renderer-side read-local-file calls can be more
+// permissive, but URL-based serving must stay scoped so arbitrary paths do not
+// become fetchable inside the app.
 export async function isAllowedLocalMediaPath(candidatePath: string) {
 	const normalizedCandidatePath = normalizePath(candidatePath);
 	return isAllowedLocalReadPath(normalizedCandidatePath);

electron/ipc/register/assets.ts

@@ -109,6 +109,11 @@ export function registerAssetHandlers() {
 
   ipcMain.handle('read-local-file', async (_, filePath: string) => {
     try {
+      // Intentionally more permissive than the media-server allowlist: this IPC
+      // is used for direct renderer-side local file reads after the app has
+      // already accepted a path, while URL-based media serving must stay scoped
+      // to approved/app-managed locations. We still canonicalize the path and
+      // require a real on-disk file so this cannot be used to read directories.
       const resolved = await resolveReadableLocalFilePath(filePath)
 
       const data = await fs.readFile(resolved)