test(dashboard): add test coverage for dashboard command (0%)

[agents-squads]

Problem

dashboard.ts command has 0% test coverage — entire command is untested.

Dashboard is user-facing feature that shows squad status, metrics, and activity. Untested paths cause rendering bugs, missing data, and poor UX.

Location

• Source: src/commands/dashboard.ts (1310 lines)
• Test: MISSING

Coverage Analysis

• Current coverage: 0%
• Functions: render(), fetchMetrics(), formatOutput()
• The entire dashboard rendering pipeline is untested

Regression Risk

MEDIUM-HIGH: Dashboard is user-facing. Broken rendering:

1. Metrics display incorrectly
2. Layout breaks on different terminal sizes
3. Color formatting fails in piped output
4. Real-time updates stall
5. Database queries timeout

Suggested Test Cases

• Render dashboard with multiple squads
• Handle missing metrics gracefully
• Format output for different terminal widths
• Handle database connection failures
• Parse execution history correctly
• Display agent status accurately
• Show cost metrics properly
• Handle concurrent updates

Priority Rationale

P2: User-facing feature but not critical path. Start with basic rendering tests.