Add temporary pause controls

[akramj13]

Summary

Add temporary pause controls so users can quiet Cotabby for a bounded period without changing their normal global setting or adding a permanent per-app rule.

This branch adds durable pause state, menu-bar pause actions and status, and pipeline gating so Cotabby does not generate, show, or accept suggestions while paused.

Validation

• xcodebuild -project Cotabby.xcodeproj -scheme "Cotabby Dev" -configuration Debug -destination 'platform=macOS' -derivedDataPath build/DerivedData CODE_SIGNING_ALLOWED=NO build
  • ** BUILD SUCCEEDED **

Linked issues

Fixes #8

Risk / rollout notes

• This adds a new persisted pause-state setting and updates the project file to include the new model and tests.
• The branch currently includes pause options for 15 minutes, 30 minutes, 1 hour, until tomorrow, and indefinitely. The issue only explicitly called out 15 minutes, 1 hour, tomorrow, and manual resume.

Greptile Summary

This PR adds a temporary pause feature to Cotabby, allowing users to silence suggestions for bounded durations (15 min, 30 min, 1 hr, until tomorrow, or indefinitely) without changing their permanent global-enable setting. The implementation introduces durable SuggestionPauseState persisted via UserDefaults, a SuggestionSettingsModel-owned timer for auto-expiry, and full pipeline gating (input, visual context capture, acceptance, indicator) via the SuggestionSettingsSnapshot.

• New model layer (SuggestionPauseModels.swift): SuggestionPauseDuration encapsulates all calendar math (including DST-safe "until tomorrow" via Calendar.startOfDay), and SuggestionPauseState is a codable enum that is persisted across launches with expiry filtering on load.
• Settings model changes: pauseState is a @Published property integrated into the Combine snapshot publisher alongside $isGloballyEnabled; a Timer on RunLoop.main(.common) auto-calls clearPause() on expiry; toggleGloballyEnabled() is updated to call enableCotabby() (which clears both mechanisms) instead of just flipping the global flag.
• Pipeline & UI gating: All six call sites (input, visual context ×3, prediction, acceptance) now pass isTemporarilyPaused to SuggestionAvailabilityEvaluator; the menu bar replaces the global toggle with a pause sub-menu and a single recovery action.

Confidence Score: 5/5

The change is safe to merge. All six pipeline gate sites are updated consistently, persistence round-trips correctly, and the timer auto-expiry is wired to RunLoop.main(.common) so it fires through menu tracking and other UI modes.

The new pause state is well-isolated from the existing global-enable flag, the Combine publisher integration is correct, expired pauses are filtered on load and cleaned from UserDefaults, and the acceptance gate prevents Tab from accepting a stale pre-pause suggestion. Test coverage is thorough: calendar math, expiry boundary, store round-trips, coordinator gating, and snapshot publisher emissions are all exercised. No functional defects were identified in the changed paths.

No files require special attention.

Important Files Changed

Filename	Overview
Cotabby/Models/SuggestionPauseModels.swift	New file defining SuggestionPauseDuration (menu choices + calendar math) and SuggestionPauseState (codable enum with expiry logic). DST-safe "until tomorrow" uses Calendar.startOfDay; statusText equality check for tomorrow relies correctly on the same calendar method used at pause creation time.
Cotabby/Models/SuggestionSettingsModel.swift	Adds @published pauseState, pauseExpirationTimer, pauseSuggestions/clearPause/enableCotabby methods, and integrates $pauseState into the CombineLatest snapshot publisher. Timer uses Timer(fire:interval:repeats:) + RunLoop.main(.common) correctly. toggleGloballyEnabled updated to call enableCotabby() when paused or disabled.
Cotabby/Support/SuggestionSettingsStore.swift	Adds savePauseState (nil → removeObject, non-nil → encode+set) and loads with activeState() filtering to discard expired pauses on launch. The unconditional write-back correctly persists the filtered state (removing stale expired keys). pauseStateDefaultsKey is included in allPreferenceDefaultsKeys for reset coverage.
Cotabby/Support/SuggestionAvailabilityEvaluator.swift	Adds temporarilyPaused parameter (default false) to disabledReason, shouldSchedulePrediction, and shouldCaptureVisualContext. Pause is checked after the global-disable guard, which is the correct precedence order.
Cotabby/UI/MenuBarView.swift	Replaces the global enable toggle with a pause sub-menu (active state) or a single "Enable Cotabby" recovery button (paused/disabled state). Removes globallyEnabledBinding. The mutual-exclusion logic prevents stacking contradictory disable states from the UI.
Cotabby/App/Core/AppDelegate.swift	Adds a snapshotPublisher subscription so the field-edge indicator is hidden when a menu action pauses Cotabby without a focus change. updateActivationIndicator now takes an optional snapshot parameter and falls back to suggestionSettings.snapshot, also checking isTemporarilyPaused.
Cotabby/App/Coordinators/SuggestionCoordinator+Acceptance.swift	Gates acceptance on currentDisabledReason (which now includes pause) before entering the state-machine path. Correctly blocks Tab acceptance of a suggestion that was shown before the pause was activated.
CotabbyTests/SuggestionPauseModelsTests.swift	New test file covering minute/hour intervals, DST-safe untilTomorrow (America/Toronto), and isActive boundary at exact expiration. Good coverage of the deterministic calendar math.
CotabbyTests/SuggestionSettingsStoreTests.swift	Adds tests for indefinite-pause round-trip, expired-pause discard + UserDefaults cleanup, and inclusion in resetToDefaults coverage. All new paths are exercised.
Cotabby/App/Core/CotabbyAppEnvironment.swift	Adds isTemporarilyPaused checks to the isCaptureSuppressedForBundle and shouldProcessEventsProvider closures, following the same pattern as the existing isGloballyEnabled checks.
Cotabby/UI/MenuBarStatusLabelView.swift	Adds a pause.fill badge to the menu-bar icon when paused or globally disabled, with VoiceOver label correctly distinguishing "Cotabby paused" from "Cotabby disabled" via inactiveAccessibilityLabel.

_{Reviews (2): Last reviewed commit: "fix: preserve pause state on encode fail..." | Re-trigger Greptile}

[akramj13]

@greptileai