refactor: comprehensive schedule trigger component redesign

[lyzno1]

Summary

Complete refactoring of the trigger-schedule component to implement unified timezone handling, simplified frequency modes, and enhanced data structure compatibility.

Key Changes

Architecture Improvements

• Timezone Unification: Implemented user timezone display with UTC backend transmission
• Mode Simplification: Removed 'once' frequency mode and simplified hourly execution model
• Data Structure: Streamlined types and removed legacy fields (datetime, recur_every, recur_unit)

Component Restructure

• Hourly Mode: Simplified to on_minute field only (execute every hour at minute X)
• Weekly Mode: Added multi-select support following monthly pattern
• Monthly Logic: Fixed edge case handling for invalid day selections (skip rather than fallback)
• Default Frequency: Changed from daily to weekly

Data Structure Changes

// Removed fields
- datetime: Date
- recur_every: number
- recur_unit: 'hours' | 'days'

// Core structure maintained
{
  mode: 'visual' | 'cron',
  frequency: 'hourly' | 'daily' | 'weekly' | 'monthly',
  visual_config: {
    time?: string,           // User format display, UTC transmission
    weekdays?: string[],     // Multi-select support
    on_minute?: number,      // Hourly mode (0-59)
    monthly_days?: (number | 'last')[]
  },
  timezone: string,          // User timezone for display
  enabled: boolean
}

Technical Implementation

• UTC Conversion: Automatic user time ↔ UTC conversion with format detection
• Execution Calculator: Enhanced monthly logic to skip invalid days instead of fallback
• Comprehensive Testing: 146 tests covering all modes, timezone handling, and edge cases
• UI Components: Custom on_minute selector with left display + right slider design

Testing Coverage

• Unit Tests: Complete coverage for all frequency modes
• Timezone Tests: Round-trip conversion validation
• Edge Cases: Monthly day selection, leap year handling, timezone boundaries
• Integration: Full validation workflow testing

Related Issues

• [☂️] Dify Trigger — Event-driven Workflow Foundation #23981
• [☂️] Dify Trigger — Frontend: Schedule Node UI & Configuration Panel #24001

[lyzno1]

2025-08-22.22.45.01.mov

[AAEE86]

2025-08-22.22.45.01.mov

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