[NOTIF-003] Emit view notifications on public profile views

[chev0004]

Outline

Summary

Emits a 'view' notification to the profile owner when their public profile is viewed, reusing the NOTIF-001 creation path.

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Changes & Enhancements

• Type of Change:
  • Feature
  • Bugfix
  • Refactor
  • Chore
• Changes:
  • (db):
    • Add hasRecentViewNotification lookup that matches an existing 'view' notification for the owner by actor name (or guest flag) within a time window.
  • (notifications):
    • Add server-side notifyProfileView that skips duplicates inside a one-hour window and swallows failures so profile rendering is never blocked.
  • (public profile):
    • Emit the view notification on public profile render, distinguishing guest and authenticated viewers and skipping self-views.

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Page / App Changes

Affected Next.js Routes (Local):

• /[lang]/u/[id]

Before (Screenshot)

After (Screenshot)

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Component / Storybook Changes

Affected Storybook Components (Local):

Before (Screenshot)

After (Screenshot)

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Not Doing

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Other (Remarks)

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Checklists

• Code is well-documented (comments, JSDoc, etc.).
• Existing comments were updated as needed.
• No out-of-scope changes are included.
• Write TODO comments where future work is required.
• Removed unnecessary debug code (e.g., console.log, debugger).
• Self-reviewed and tested locally.