feat: add chat-first experience with adaptive visual answers

[jerelvelarde]

The app now opens directly to chat and selects a presentation for each request: text for direct answers, A2UI for basic tables, and sandboxed interactive UI for charts, diagrams, calculators, and maps. Jev makes the typed routing decision; the answer model defaults to chat-latest.

Chat preserves the reader's position during generation, reveals answer blocks as they enter view, and shows copy controls on hover or keyboard focus. Follow-up interactions share the chat thread, and provider/bridge failures surface retryable errors.

The coastal-trip demo uses live USGS tiles and credited Wikimedia photos. Numbered pins drop into place over six seconds with pause/resume, replay, card selection, reduced-motion behavior, and standalone HTML export support. Connections are illustrative, not verified driving directions. The restored Pitch, Roll & Yaw starter generates a Three.js airplane with labeled axes, animated controls, sliders, and reset.

Documentation and repository links now use CopilotKit/OpenIntelligentUI. Local setup creates placeholders for the required OpenAI and TypeSafe keys. The Open Generative UI runtime API names and deployment service names remain unchanged; the standalone MCP package follows the rename on main as open-intelligent-ui-mcp. The README follows the OpenDots layout with a tracked engineer CTA, the launch film, and four feature clips. Uploads remain in an unposted issue draft; media loads when signed in but anonymous asset requests currently return 404.

The merge preserves main’s branding rename and fixes Jev filtering for the runtime-injected render_a2ui tool. A2UI guidance now uses the actual structured tool arguments; regression tests cover renderer filtering in the real agent graph.

Validation

• Fresh verification after resolving main and fixing A2UI routing on f8d496e: frozen pnpm/uv installs, lint, explicit app TypeScript check, production build, 139 JavaScript tests and 93 Python tests passed. The routing regression failed before the fix and passes after it.
• Earlier validation of the revamp:
• Lint: zero errors (existing Next font warning). Explicit TypeScript checks, full workspace/production build, and frozen pnpm lockfile validation passed.
• JavaScript workspace: 139 tests passed (app, design system, MCP).
• Python agent: 93 tests passed.
• Setup checked in an isolated directory: required placeholders created; existing configuration preserved.
• Local documentation links resolve; git diff --check passes.
• Provider-backed browser checks completed for maps, photo loading, pin animation, replay, pause/resume, stop selection, and the 3D airplane's axis controls and reset.

Remaining validation

Local Docker build could not run: Docker Desktop reports that it is unable to start. Existing CI does not build Docker images, so container-image validation remains outstanding; the application production build passed. Container-image validation remains outstanding; the user explicitly requested merging this PR before the separate website attribution change.

Deployment

Set OPENAI_API_KEY and TYPESAFE_API_KEY on the agent service and verify access to chat-latest and jev-latest. Run a deployed provider-backed smoke test after release. This PR does not deploy the changes.