feat(ai): implement Nvidia NIM-powered financial briefing chat assist…

[Victorakinwunmi]

Closes #55

Changes

• Implemented FinancialAssistantPanel.tsx with streaming simulation and responsive chat bubbles.
• Added Zod validation schemas for payload and assistant message types in src/types/ai.ts.
• Integrated keyboard navigation (Enter to submit, Shift+Enter for multiline).

[vercel]

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[mergekeeper]

MergeKeeper review

Scope: in scope for linked issue #55.
Verdict: clean

Successfully implemented FinancialAssistantPanel and Zod schemas for AI chat meeting all requirements.

Reviewed commit: 6e9f928a4692084c140e0c121725890168fa1d83.
CI and merge eligibility are checked separately.

[mergekeeper]

MergeKeeper merge status

Status: blocked
PR state: open
Mergeability: unknown
Checked commit: 6e9f928a4692084c140e0c121725890168fa1d83.

Reason: One or more required CI checks failed.

Failing checks:

• build - view details

Next steps:

1. Open the failing check details above and fix the reported error.
2. Run the same checks locally where possible.
3. Commit and push the fix.
4. MergeKeeper will automatically re-review the updated PR.

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