add StatusBar component with agent status and skills display

[JeremyDev87]

Summary

• Add StatusBar component showing active agent count, skills display, progress bar, and execution phase (Parallel/Sequential/Waiting)
• Implement pure rendering functions (countActiveAgents, calculateOverallProgress, buildStatusProgressBar, determinePhase, buildSkillsDisplay) with full test coverage
• Extend buildProgressBar to accept custom fill/empty characters for reuse in StatusBar
• Update ESLint config with TSX support, test file globals, and additional ignore patterns

Changes

New Files

• apps/mcp-server/src/tui/components/status-bar.pure.ts — Pure rendering functions for status bar logic
• apps/mcp-server/src/tui/components/status-bar.pure.spec.ts — Unit tests for pure functions (28 test cases)
• apps/mcp-server/src/tui/components/StatusBar.tsx — React (Ink) component rendering the status bar
• apps/mcp-server/src/tui/components/StatusBar.spec.tsx — Component integration tests (8 test cases)

Modified Files

• apps/mcp-server/src/tui/components/progress-bar.pure.ts — Add optional filledChar/emptyChar parameters
• apps/mcp-server/src/tui/components/index.ts — Barrel exports for StatusBar
• apps/mcp-server/src/tui/app.tsx — Integrate StatusBar, consume skills from event bus
• eslint.config.js — TSX parsing, test globals, no-undef off, additional ignores

Test Plan

• Run yarn workspace codingbuddy test to verify all unit and component tests pass
• Verify ESLint passes with yarn workspace codingbuddy lint (if available)
• Manually verify StatusBar renders correctly in the TUI via yarn workspace codingbuddy start:dev