Add robust date parsing and simplify lesson selection logic. Introduces ISO8601 formatters (with and without fractional seconds) and updates parseNextSchoolDayDate to try both variants, plus existing yyyy-MM-dd fallback. Adds LessonCandidate, startOfDay and nextSchoolDay helpers and builds a sorted candidate list (today, tomorrow, next school day) to pick the appropriate lesson set and correctly set isNextDay/isNextSchoolDay flags. Cleans up previous branching-heavy logic and improves handling of edge cases (lessons finished, next-school-day resolution).
Several watch UI and sync improvements: clamp CountdownRing values and use clamped values for progress/color/display; add optional backgroundColor to FirkaCard and refactor HomeView to use lessonTitleWithStatus, lessonCardBackgroundColor and improved break time calculation and refresh handling (onChange of lastUpdated). TimetableView now shows status icons/colors via helper methods. DataStore now returns a localized "time_now" for recent updates. WatchSessionManager handles Flutter channel/unready states by serving shared language state when available and avoids empty language replies. Dart fixes: await initLang in settings, return null from WatchSyncHelper when uninitialized, and attempt to publish language to watch after initialization in main.
Replace index-based loops with zip(entry.lessons, entry.lessons.dropFirst()) in TimetableMediumView and TimetableLargeView to iterate adjacent lesson pairs. This improves readability and safety (avoids manual index arithmetic and potential out-of-bounds issues) while keeping the same break-detection logic.
Introduce shared session and language state plus cross-device refresh leases to improve Watch/iPhone sync. Adds SharedSessionStateManager, SharedLanguageStateManager and RefreshLeaseManager (keychain-backed) and exposes accessGroup via SharedKeychainManager. Wire shared state into WatchSessionManager (publish/load language and session state, immediate token send via message + userInfo + applicationContext, reachability check, lease-related Flutter handlers) and into WatchConnectivityManager (parse versions, apply immediate token updates). Update DataStore and WatchL10n to reconcile shared session/language state, handle stale account switching, and request tokens from phone when needed. Add TokenManager watch-side lease wrapper for refresh coordination, UI tweaks for pairing/no-token messages and icons, small fixes (date parsing in widget provider, background refresh cadence to ~15 min, time-since localization keys and usage), and various helper utilities for parsing int64 and state versioning.
iOS: Update WatchSessionManager to send the current language via WCSession.default.updateApplicationContext with logging and error handling, in addition to existing transferUserInfo. Dart: await initLang during startup and add dispatcher.onLocaleChanged handler that re-initializes language when the app is in auto-language mode, logs locale changes, and triggers a global UI update.
Add SharedKeychainManager and migrate token storage from the old iCloud Key-Value (KV) approach to a synchronized Keychain-backed solution. Replace iCloudTokenManager usages across WatchSessionManager, TokenManager, and WatchConnectivityManager, update saveToken API to syncToSharedKeychain, and add KV-store migration logic that moves existing KV entries into the shared Keychain and clears the old KV store. Update entitlements (add keychain-access-groups) for both Runner and the Watch app, add/remove files in the Xcode project, delete iCloudTokenManager.swift. Also include access-group resolution, logging, and compatibility observer methods in the new manager.
Track and surface classified token recovery failures and add a timed iCloud probe to accelerate recovery. TokenManager: introduce lastRecoveryFailure, clearLastRecoveryFailure(), and iCloudProbeTimeoutNs; add probeICloudTokenWithTimeout() and attempt an early iCloud-probe apply before refresh flow; record TokenError results from refresh attempts and abort recovery early on network errors; clear failure on successful actions; default lastRecoveryFailure to .noToken when all attempts fail. KretaAPIClient: clear failure on valid token/recovery success and throw a classified APIError when recovery produced a known TokenError. Overall: better diagnostics, faster iCloud-based short-circuiting, and more robust recovery error handling.
Improve Apple Watch sync resilience and token safety across iOS and Flutter. Key changes:
- Watch (watchOS): rate-limit phone token requests, handle "force_logout" via applicationContext/userInfo and perform local token deletion/cleanup. Added cooldown tracking.
- iPhone host (Swift): expose Flutter methods to check watch app installation, clear iCloud token, and send force-logout to the watch; refuse to forward expired tokens and avoid using iCloud fallback when Flutter reports reauth needed.
- Flutter (WatchSyncHelper/KretaClient): cache and check whether a paired Watch app is installed before touching iCloud/watch; reject expired access tokens (both incoming and outgoing) and prevent sending expired tokens to watch; added fresh-install cleanup to clear iCloud/local state once per install; added methods to notify watch of forced logout and to clear iCloud token.
- Initialization: run fresh-install cleanup before attempting iCloud recovery and skip recovery if cleanup ran.
- Login/settings/home UI: only attempt watch sync when a watch is installed; clear iCloud token on account removal (iOS); minor UX/timing and formatting cleanups.
These changes prevent propagation of expired tokens, reduce redundant phone/watch messaging, and provide a controlled force-logout flow for account removal or fresh installs.
