Polish menu controls and live session updates for build 5

[leejaywon]

Replaces #1 after renaming the head branch to remove the codex/ prefix.

Summary

• replace verbose session state/action labels with accessible play and pause icon controls
• update Start/Pause results in the currently open menu without requiring a close and reopen
• disable the session toggle while the helper request is pending and render status/error rows in place
• replace visible Battery and Temperature labels with native SF Symbols while preserving VoiceOver descriptions
• move Advanced and the active-session uncovered warning into the Liddddd submenu
• time out unreachable XPC requests and provide an ad-hoc local-helper recovery path
• bump the app build number to 5 and align README and deployment documentation with the current repository

Validation

• Swift formatting completed for the modified sources
• swift test --disable-sandbox (17 tests)
• clean production build after deleting build/ and .build/
• plutil -lint for the packaged app and helper property lists
• codesign --verify --deep --strict --verbose=2 build/Liddddd.app
• verified the packaged app and helper are arm64 Mach-O executables
• git diff --check

Manual test status

• the updated /Applications/Liddddd.app has not yet been installed and manually smoke-tested; the existing installed copy is an older binary