Connector Control 1.2.3

Reliability release: fixes from a full code review of 1.1.4–1.2.2.

• Environment variable editing no longer silently alters data: a value
  without a name blocks saving instead of vanishing, variable names are
  preserved exactly as written (no more surprise whitespace trimming), and
  switching to the JSON view enforces the same duplicate-name validation as
  Save.
• Notifications are truthful and complete: no "config regenerated" banner
  when the write actually failed (a failure now gets its own banner, once),
  a synced change that can't be applied is announced instead of silent, and
  banners now show even while Connector Control is the active app.
• Update feed hardening: version numbers (not build counters) order updates,
  and prerelease tags can no longer reach the auto-update feed.
• Deleting or breaking the connector-list file mid-session can no longer
  wipe Claude's config — the app restores its own list instead.
• Backup ordering is immune to daylight-saving clock rollbacks (timestamps
  are now UTC).

Full changelog: v1.2.2...v1.2.3