feat(analytics): Umami website-analytics suite — world map, realtime, sessions, heatmap, pixel tracking, tracked links

Adds the read-side Umami integration queued in last week's
website-analytics plan (Phases 1–6 of `docs/website-analytics-flesh-out-plan.md`):

- Realtime panel polls Umami at 5s intervals; world map renders visitor
  origins via echarts + `public/world-map/echarts-world.json` topo.
- Sessions list + session-detail-sheet drill-down (per-session event
  timeline pulled from `/api/v1/website-analytics`).
- Weekly heatmap (day-of-week × hour-of-day) for engagement timing.
- Metric-detail pages under `/[portSlug]/website-analytics/[metric]`
  for pageviews / referrers / events deep-dives.
- Email-pixel write path: `/api/public/email-pixel/[sendId]` 1×1 GIF
  beacon backed by `email_open_tracking` (migration 0076); resolves
  inline on render in inbox.
- Tracked-link redirect: `/q/[slug]` routes through `tracked_links`
  (migration 0077) and forwards to the canonical destination after
  logging the click.
- Dashboard `website-glance-tile` now reads from the live Umami service
  instead of placeholder data.

Deps: `@umami/node`, `echarts`, `echarts-for-react`, `@types/geojson`,
`@types/topojson-client`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -67,6 +67,7 @@
     "@tanstack/react-table": "^8.21.3",
     "@tanstack/react-virtual": "^3.13.24",
     "@types/pdfkit": "^0.17.6",
+    "@umami/node": "^0.4.0",
     "@use-gesture/react": "^10.3.1",
     "archiver": "^7.0.1",
     "better-auth": "^1.6.11",
@@ -78,6 +79,8 @@
     "cron-parser": "^5.5.0",
     "date-fns": "^4.1.0",
     "drizzle-orm": "^0.45.2",
+    "echarts": "^6.0.0",
+    "echarts-for-react": "^3.0.6",
     "embla-carousel-react": "^8.6.0",
     "imapflow": "^1.3.3",
     "ioredis": "^5.10.1",
@@ -141,6 +144,7 @@
     "@tailwindcss/postcss": "^4.3.0",
     "@total-typescript/ts-reset": "^0.6.1",
     "@types/archiver": "^7.0.0",
+    "@types/geojson": "^7946.0.16",
     "@types/iso-3166-2": "^1.0.4",
     "@types/mailparser": "^3.4.6",
     "@types/node": "^20.19.0",
@@ -148,6 +152,7 @@
     "@types/papaparse": "^5.5.2",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@types/topojson-client": "^3.1.5",
     "@vitejs/plugin-react": "^6.0.1",
     "@vitest/coverage-v8": "^4.1.6",
     "dotenv": "^17.4.2",