refactor: more robust camoufox proxy handling

src-tauri/src/sync/manifest.rs

@@ -62,9 +62,9 @@ pub const DEFAULT_EXCLUDE_PATTERNS: &[&str] = &[
   "**/BrowserMetrics*",
   "**/.DS_Store",
   ".donut-sync/**",
-  // Local-only marker recording when Wayfern last refreshed this profile's
-  // fingerprint. Each device decides its own refresh cadence, so syncing
-  // this would cause one device's refresh to silence others.
+  // Orphaned local-only marker from earlier rollover-based fingerprint
+  // regeneration. Keep excluding it so any markers left on disk from
+  // prior builds never get uploaded.
   ".last-fp-refresh",
 ];