feat(educators): add public educator storefront pages

[BountySpaghetti]

Summary

Create shareable, logged-out-viewable educator profile pages with courses, books, spaces, follower counts, and auth-aware CTAs. Educators can now share a URL in bios, flyers, or khutbah slides.

Closes #116

What's Changed

New: /educators/[profileid] route

• Fully public — accessible without authentication, no redirect to login
• Server-side metadata — generateMetadata provides SEO title, description, and OpenGraph tags
• Landing page chrome — uses Navbar/Footer from the landing page, not the dashboard sidebar
• Tabbed content — Courses, Books, and Spaces tabs with counts
• Privacy guard — shows designed not-found state for missing/private educator IDs

New: EducatorProfileHeader component

• Banner + avatar, name, role, bio, joined date
• Follower count, courses/books/spaces counts, aggregate rating
• Share button — Web Share API on mobile, clipboard fallback on desktop
• Follow button — auth-aware: logged-in users get real follow toggle; logged-out users redirect to /login?next=/educators/[id]
• "Edit Profile" shown for own profile

New: Public card variants

• PublicCourseCard — no bookmark hook, shows rating + price, links to course
• PublicBookCard — no bookmark hook, shows rating + readers + price
• PublicSpaceCard — no auth dependencies, shows host + duration + status
• All cards are lightweight with zero auth dependencies

Rewired instructor links

• courseCard.jsx — instructor avatar links to /educators/[id] instead of /account/profile/[id]
• libraryCard.jsx — author links to /educators/[id]
• spaceCard.jsx — host name links to /educators/[id] (new link)

Authenticated profile page update

• /account/profile/[profileid] now shows a "View public page" link with external link icon

Acceptance Criteria

• Logged-out visitors can view /educators/<id> — no redirect to login
• Follow from public page bounces through login and returns to the same page
• Instructor attribution on cards links to public page
• Old gated /account/profile/[id] remains functional for logged-in users
• No private fields (email, wallet, settings) appear in rendered page
• Unknown/private educator IDs show designed not-found states
• Page is responsive and keyboard-navigable
• Share button copies working URL (Web Share API on mobile)
• npm run lint and npm run build pass; CI green

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Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between c332319 and 7394082.

📒 Files selected for processing (10)

• app/(pages)/educators/[profileid]/EducatorPageClient.jsx
• app/(pages)/educators/[profileid]/page.jsx
• app/account/profile/[profileid]/page.jsx
• components/molecules/dashboard/cards/courseCard.jsx
• components/molecules/dashboard/cards/educators/PublicBookCard.jsx
• components/molecules/dashboard/cards/educators/PublicCourseCard.jsx
• components/molecules/dashboard/cards/educators/PublicSpaceCard.jsx
• components/molecules/dashboard/cards/libraryCard.jsx
• components/molecules/dashboard/cards/spaceCard.jsx
• components/organisms/educators/EducatorProfileHeader.jsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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