🎨 Palette: TaskTile refinement and accessibility – 2025-05-15

[Mahdi-mortazavi]

💡 What:

• Enhanced TaskTile with a rotating chevron icon and smooth subtask expansion using AnimatedSize.
• Added tactile feedback (HapticFeedback) to all interactive elements in TaskTile and PinnedCard.
• Implemented comprehensive Semantics in Persian for all interactive components.
• Refined interaction model: chevron tap or long-press expands subtasks, while tile tap opens the edit sheet.

🎯 Why:

• Subtasks were difficult to discover and expansion was abrupt.
• Interactive elements lacked tactile feedback, making the app feel less "alive".
• Accessibility was missing, making the app unusable with screen readers.
• Fixed a broken import in main.dart that prevented the app from running.

♿ Accessibility improvements:

• Added Persian labels and hints for completion checkboxes, focus buttons, and task tiles.
• Ensured all interactive elements have appropriate Semantics roles.

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PR created automatically by Jules for task 9700758719561936292 started by @Mahdi-mortazavi

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