feat: add portfolio, local AI notes, WebMCP tools and Pages deployment

[ackneal]

Summary

Build a personal portfolio with a career timeline, on-device AI answers grounded in career evidence, and WebMCP tools. Add a Bun build and release-branch GitHub Pages deployment.

Key Changes

• Career evidence: Share canonical profile, experience, project, and education data across the site and six read-only WebMCP tools.
• Local AI: Generate answers on-device with selected focus areas, evidence links, classification fallback, and session cleanup.
• Tool discovery: Describe tool usage and expose available project evidence without prescribing a fixed agent workflow.
• Release deployment: Run tests, type checking, and static-site bundling on pushes to release, then publish the build output to GitHub Pages.

Side Effects

• Known typecheck blocker: The adapter test still imports PromptMessage from an untracked types module. The previously verified BrowserMessage fix is not included in the pushed branch; clean-checkout type checking will fail until that fix is committed.
• Deployment trigger: Merging this PR into main does not deploy the site. Only pushes to release trigger the workflow, and Pages must use GitHub Actions as its source.
• Browser requirements: Local AI and WebMCP require compatible browser APIs. Real-browser interaction and hosted deployment have not been verified.

Verification

• Automated tests: All 58 tracked tests passed in an isolated source snapshot.
• Conditional validation: Type checking, static bundling, and PDF copying passed after applying the missing BrowserMessage fix locally; this does not establish a passing typecheck for the current PR head.