- Add exponential backoff with jitter to S2A OAuth submission (3 attempts)
- Implement 5xx error retry mechanism in Codex API workspace selection (5 attempts)
- Add 429 rate limit handling with retry support in Codex API
- Improve team member processing with staggered delays to avoid concurrent conflicts
- Add per-attempt proxy rotation to avoid reusing failed proxies
- Enhance retry delay calculation with random jitter to prevent thundering herd
- Update logging to display retry attempts and delay durations
- Improve error messages with HTTP status codes and response body snippets
- Refactor retry loops to use consistent exponential backoff pattern across modules
- Add backend endpoint `/api/s2a/fetch-groups` to fetch S2A groups using arbitrary credentials without depending on global config
- Implement `handleFetchGroups` handler with proper error handling and multiple auth header support (Bearer token, X-API-Key, X-Admin-Key)
- Add frontend API function `fetchGroupsWithCredentials` to call the new endpoint and parse S2A standard response format
- Add group fetching UI in S2AConfig edit mode with refresh button and loading state
- Implement batch group name caching in list view to display human-readable group names instead of IDs
- Deduplicate API requests by grouping profiles with identical credentials to avoid redundant calls
- Add fallback to display group ID when name is unavailable
- Add new `/api/s2a/profiles` endpoint supporting GET, POST, DELETE operations
- Create `s2a_profiles` database table with fields for API configuration, concurrency, priority, group IDs, and proxy settings
- Implement database methods: `GetS2AProfiles()`, `AddS2AProfile()`, `DeleteS2AProfile()`
- Add S2AProfile struct to database models with JSON serialization support
- Implement profile management UI in S2AConfig page with save, load, and delete functionality
- Add profile list display with ability to apply saved configurations
- Add S2AProfile type definition to frontend types
- Enable users to save and reuse S2A configurations as presets for faster setup
- Aggregate total_registered and total_added_to_s2a from batch_team_results table
- Calculate success_rate based on actual S2A additions vs total owners
- Compute duration_seconds from started_at and finished_at timestamps
- Improve stuck batch run recovery by restoring accurate metrics instead of zeroing them out
- Add CleanupStuckProcessingOwners database method to reset owners stuck in processing status back to valid state
- Call cleanup routine on application startup to recover from previous abnormal exits
- Call cleanup routine after batch processing completes to ensure no orphaned processing states remain
- Add markOwnerResult calls in processSingleTeam when team invitations are full to properly track owner status
- Prevents owners from being permanently stuck in processing state due to unexpected shutdowns or errors
- Implement pause/resume mechanism using sync.Cond to halt worker goroutines
- Add consecutive zero S2A counter to detect when no accounts are added for 2+ teams
- Trigger automatic 1-minute pause when consecutive zero entries detected
- Log warning messages with team details when pause is triggered
- Reset counter on successful S2A entries or when pause completes
- Allow stop signal to interrupt pause period for graceful shutdown
- Broadcast resume signal to all waiting workers after pause completes
- Prevents resource exhaustion and provides recovery time during low-activity periods
- Remove redundant username field from password verification payload in CodexAPIAuth
- Update proxy refresh button to use arrow function for proper event handling
- Simplify authentication flow by eliminating unnecessary email parameter in password verification request
