f559f6b10c
- Added formatContextUsage to render context as `%/window` with `?` fallback across status and task views. - Updated task renderCall to show dispatched agents as tree entries with `Tasks (2)` header and `#3` fallback. - Capped task preview collapse at 12 entries and added `... N more agents` overflow messaging. - Replaced hard-coded dot separators with `theme.sep.dot` in subagent cost and context output. - Added tests for streaming task preview rendering and updated nested-live expectations for percent/context output.