[Projects] Learning Projects external links: noopener / target policy

[andrewy1n]

Problem

New outbound links on the Learning Projects work (e.g. Arctos site, AlohaMini GitHub) must follow safe, consistent patterns (rel, target) so we do not regress security or UX.

Scope

• Apply rel="noopener noreferrer" when using target="_blank"; if the site standard is same-tab navigation, document that and apply consistently for these URLs.
• Cover all links introduced by Learning Projects updates ([Projects] Refresh Learning Projects copy (Pupper, ARCTOS, SO101) #168–[Projects] Add MiniAloha to Learning Projects page #170, [Projects] Extend LearningProjectSection (status, humanoid bridge, links) #169).

Acceptance Criteria

• All new outbound links from the Learning Projects effort meet the chosen policy.
• Optional follow-up: audit other project pages for the same rule (separate issue if scope grows).

Files

• src/pages/Projects/LearningProjects.tsx
• src/pages/Projects/components/LearningProjectSection.tsx (if links render here)

Related

• Depends on issues that add outbound links to the learning page.