feat: Add collapsible dependent tasks functionality #580
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Implemented the ability to collapse and expand dependent tasks in the Gantt chart, making it easier to manage complex project hierarchies. Features: - Tasks with dependents show a collapse/expand button (−/+) on the left - Clicking the button toggles visibility of all dependent tasks recursively - Grid automatically adjusts height when tasks are collapsed/expanded - Bars automatically expand to accommodate button and text - Buttons move with bars during drag operations Technical details: - Added collapsed_tasks Set to track collapsed state - Implemented recursive dependency tracking - Dynamic task indexing for proper layout when tasks are hidden - Smart bar width calculation to prevent text overlap - Configurable button spacing (button_space parameter) Includes demo page (collapsible-tasks-demo.html) and documentation. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Implemented the ability to collapse and expand dependent tasks in the Gantt chart, making it easier to manage complex project hierarchies. Implements #522
Features:
Technical details:
Includes demo page (collapsible-tasks-demo.html) and documentation.