[enhancement] E5-3: No published TypeScript client SDK — duplication between MCP and dashboard clients

[OneStepAt4time]

Finding

ID: Enterprise Gap | Severity: 🟠 MEDIUM

No published SDK. AegisClient in mcp-server.ts and dashboard/src/api/client.ts duplicate auth/retry logic independently.

Fix Required

Extract AegisClient into a standalone npm package @onestepat4time/aegis-client. Reuse in both mcp-server.ts and dashboard/src/api/client.ts.

Output: New packages/client/ workspace.

Milestone

M-E5: API & Integration

[OneStepAt4time]

Implemented in PR #1530 (merged). @aegis/client package added at packages/client/ with full TypeScript coverage.