Replace plain text dependency indicators with visual, status-aware components:
- New DependencyChip/PhaseNumberBadge components with status-colored styling
- Sidebar shows compact numbered circles for phase deps instead of text
- Detail panel uses bordered cards with phase badges and status indicators
- Task dependency callout bars with resolved/total counters
- Collapse mechanism for tasks with 3+ dependencies (+N more button)
- Full dark mode support via semantic status tokens
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