[codex] Implement License Free State UI

[uniplanck]

Summary

• Show the Board-Man Free license state in the license preferences UI.
• Keep license activation visible but disabled/not connected.
• Keep the Pro locked control pattern visible for a Pro-only appearance control.

Visual check follow-up

• Added explicit Current Plan / Status / Last verified / Device activated rows.
• Added the full concise Pro features list: Unlimited History, Unlimited Snippets, Advanced Appearance, Export / Import, Paste Analytics, Future Sync.
• Activation remains disabled/static with no backend, network call, key storage, or device binding.

Files changed

• Clipy/Sources/Managers/MenuManager.swift
• Clipy/Sources/Preferences/Panels/CPYBetaPreferenceViewController.swift

UI state added

• Current Plan: Free Plan
• Status: Free
• Last verified: Not verified / Offline
• Device activated: Not activated
• Static copy: 1 license = 1 PC
• Upgrade CTA remains available
• Pro feature list remains visible

Entitlement source used

• EntitlementGate.currentSnapshot() in the License preferences panel.
• EntitlementService.shared.currentSnapshot in the embedded Board-Man settings panel.

Pro locked pattern added

• Uses the existing BoardManProLockedControlView pattern: disabled control, lock indicator, PRO badge, and upgrade CTA.

Validation

• git status --short: clean except existing untracked _copy/
• git diff --stat: 1 file changed, 16 insertions(+), 6 deletions(-) in follow-up commit
• git diff --check: passed
• Build passed:
  rtk xcodebuild -project Board-Man.xcodeproj -scheme Board-Man -configuration Debug -derivedDataPath "${TMPDIR:-/tmp}/BoardManCodexValidation" -destination 'generic/platform=macOS' -skipPackagePluginValidation -skipMacroValidation CODE_SIGNING_ALLOWED=NO build
• Pure Swift entitlement check: no standalone Package.swift/script available; existing ClipyTests entitlement coverage was inspected but not run separately.

Out of scope

• Real license activation
• Backend calls
• Keychain device binding
• License UI backend wiring
• Appearance UI redesign
• Sparkle release/appcast work