Refactor owned-link attribution tracking across web and desktop

[ComputelessComputer]

Summary

• centralize owned-link UTM tagging so blog, docs, changelog, and desktop settings links use one shared convention
• persist the browser PostHog distinct ID on tracked download flows and carry it through the auth callback and desktop deeplink
• add desktop analytics alias support so browser download activity and desktop machine activity can be merged during sign-in

Validation

Completed:

• pnpm exec dprint fmt
• pnpm -F @hypr/web typecheck
• pnpm -F desktop typecheck
• cargo check -p analytics -p tauri-plugin-analytics -p tauri-plugin-deeplink2

Known unrelated workspace issue:

• full cargo check still fails in crates/notification-worker/src/lib.rs because of an existing cron::Schedule / apalis_cron::Schedule<Utc> mismatch

Validation Plan

• verify a tracked web download click emits download_clicked with web_distinct_id
• complete desktop sign-in from that same browser session and confirm the callback deeplink includes web_distinct_id
• confirm the web callback aliases the stored/current browser distinct ID to the authenticated user ID
• confirm the desktop auth path aliases that same browser distinct ID to the machine fingerprint before desktop identify runs
• check in PostHog that the merged person shows both the web download event and subsequent desktop auth/activity events
• regression check that docs and blog owned links still render with the expected UTM parameters and that desktop auth still works when web_distinct_id is absent

[netlify]

✅ Deploy Preview for char-cli-web canceled.

Name	Link
🔨 Latest commit	f93361d
🔍 Latest deploy log	https://app.netlify.com/projects/char-cli-web/deploys/69da0b775f07f00008353193

[netlify]

✅ Deploy Preview for hyprnote ready!

Name	Link
🔨 Latest commit	f93361d
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote/deploys/69da0b77d906cb0008536dab
😎 Deploy Preview	https://deploy-preview-4997--hyprnote.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.