Bounty-board migration; pump/portfolio/llm/tts endpoint updates

[vwkb]

What & why

Closes #

Type of change

• Feature
• Improvement
• Fix
• Docs
• Infra / chore (no user-visible effect)

Definition of done

• Code is fully wired and reachable by the user — no dead paths, stubs, TODOs, or commented-out code.
• No mocks, fake data, or placeholder values — real APIs and real data only.
• Every interactive element has hover, active, and focus states (UI changes).
• Loading, empty, and error states are designed and helpful (UI changes).
• npm test passes and npm run typecheck is clean.
• npm run lint is clean (or only pre-existing warnings).
• I reviewed my own git diff — every changed line is justified.

Changelog

• Added a data/changelog.json entry, or this change is internal-only and needs none.

Screenshots / recordings