chore: dead-code sweep

- Delete socktop_connector/src/connector.rs: orphaned since 08f248c removed
  'pub mod connector;' during the modularization refactor. Never compiled
  (verified under default, wasm, and workspace feature combos) but shipped
  in the crates.io tarball and contained an outdated copy of the TLS
  verifier — a trap for anyone patching the pinning bug in the dead copy.
- Delete empty socktop/src/ws.rs, tracked editor backup ui/.modal.rs.backup,
  and stray test_thiserror.rs at the repo root.
- Delete the two LEGACY #[allow(dead_code)] process input handlers; the
  header-click render test now exercises the live _with_selection handler
  instead (better coverage of the real path).
- Drop unused sysinfo dependency from the socktop client.
- Replace stale 'temporarily increased for testing' comment on
  COMPRESSION_THRESHOLD (it already held the production value).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

socktop_agent/src/ws.rs

@@ -16,9 +16,7 @@ use crate::metrics::{collect_disks, collect_fast_metrics, collect_processes_all}
 use crate::proto::pb;
 use crate::state::AppState;
 
-// Compression threshold based on typical payload size
-// Temporarily increased for testing - revert to 768 for production
-//const COMPRESSION_THRESHOLD: usize = 50_000;
+// Payloads at or below this many bytes are sent as-is; larger ones are gzipped.
 const COMPRESSION_THRESHOLD: usize = 768;
 
 // Reusable buffer for compression to avoid allocations