Centralize site content and migrate to TypeScript and Tailwind

[bgar324]

Scope

Contributor-focused architecture and runtime refactor, not a redesign. Based on the deployed PR #107 merge, f435aca.

• One registry for 35 people, with 45 ordered team assignments and eight historical speaking roles. Names, titles, profile links, portrait associations, missing-photo slots, and ordering are preserved.
• Year-owned event data and shared resources/registration renderers. Existing archive routes and historical wording remain. One EVENT_ROUTES table now drives routing and the Resources menu.
• Strict TypeScript, React/DOM 19.3.0, Router 7.18.3, Tailwind 4.3.3. TypeScript 6.0.3 is the latest stable compatible with the chosen linter. The already-shipped Vite/Node24/Vitest modernization remains.
• Bootstrap, React Bootstrap, Sass, prop-types, react-ga, classnames, history, old JSX compatibility configuration, copied annual implementations, and proven dead code are removed. Native shared controls and semantic Tailwind styling replace them. Preflight is explicitly excluded; existing breakpoints and Sass cascade effects are preserved.
• Existing CI extended with types, lint, formatting, content validation, and 34 Chromium smoke cases. Contributor ownership/edit instructions and verification tools are included.

Verification

• Clean npm ci, strict typecheck, lint, formatting, 12 Vitest tests, content checks, image checks, production build, and dependency audit passed locally. Audit reported zero vulnerabilities.
• Image pipeline: 59 sources, 86 variants; zero re-encoded sources. All 102 public image/PDF/icon URLs and SHA-256 hashes are unchanged. 404.html and CNAME remain byte-identical.
• Baseline captured before CSS edits. Final comparison covers 14 routes at 15 widths: 320, 390, 575/576/577, 767/768/769, 991/992/993, 1199/1200/1201, and 1440px. All 210 geometry/style/content comparisons pass; maximum observed geometry delta is 0.03125 CSS pixels against a 0.05px ceiling.
• All 210 PNG pairs compared. No dimension changes; 121 pairs byte-identical, 142 with zero flagged pixels. Largest flagged fraction is 0.005645% at pixelmatch threshold 0.1 with antialiasing excluded. This is not a claim of universal pixel identity.
• 34 Chromium smoke cases pass, including slow/failing carousel images, aliases, mobile menu/hash repeats, video activation, linked documents, and a meaningful Back-scroll assertion. WebKit and Firefox each pass 34 route/interaction scenarios, including actual Back reading-position restoration.
• 25 hover/focus/video/carousel states compared. Autoplay advance/pause/resume, intermediate 600ms slide transforms, interrupted menu operations, and dropdown keyboard boundaries were exercised against the baseline.
• Cold Vite startup and live JSX HMR update/restore pass without document reload. A separate dummy-ID build processes the real retained analytics.js with one tracker/script, expected pageviews and outbound attribution, and collection blocked.
• Independent runtime and content/style reviews completed. Both concrete findings were fixed and received targeted approvals. A separately discovered dropdown keyboard regression has a test that failed against the affected build and passes after the fix.

Review evidence

• Plan, acceptance ledger, findings, and limitations
• Per-cell machine-readable parity results
• Shared UI canon
• Before is left, after is right: phone team, tablet home, desktop resources. Full local snapshots and nonzero diff images are retained; README commands reproduce the capture.

Limits and boundaries

Browser viewports are emulated; Playwright WebKit is not native Safari or a physical iPhone. External links are syntax-checked rather than universally contacted. Analytics verification does not prove production-property ingestion. CSS gzip decreases from 28.23KB to 8.41KB; application JS gzip increases from 99.60KB to 112.98KB with the newer runtime. These are build sizes, not field-performance claims.

No merge, deployment, hosting, secret, or branch-protection change. The user-owned src/image.png remains untracked and unchanged; local handoffs/ are not included. GitHub CI status will be recorded after the new PR run completes.

[bgar324]

Final-head CI passed for 4d4e9cb: https://github.com/exploretech-la/website/actions/runs/34592274097 . The read-only verify job completed installation, strict types, lint, formatting, content/image checks, regression tests, production build, and Chromium smoke. The acceptance ledger is complete. No merge, deployment, hosting, secret, or branch-protection change was performed.

[bgar324]

Merged with fresh authorization as b57ae7d. Production publishing passed: https://github.com/exploretech-la/website/actions/runs/34593459647 . GitHub Pages deployment passed: https://github.com/exploretech-la/website/actions/runs/34593503606 . Live HTML matches the published release assets. Production smoke passed all 13 routes with expected content and links, team counts and missing-photo slots, both /our_team aliases, mobile menu/cross-route hash navigation, carousel selection, keyboard video activation with preserved geometry, and 8 linked document/map URLs. No uncaught application exceptions. Automated smoke blocked tracking/player requests; provider playback and analytics ingestion were not asserted.