feat(footer): add Documentation and Contact support links

[nunoeufrasio]

What

Adds two links to the footer Platform section, and a Documentation entry to the navbar More menu:

• Documentation — opens https://docs.linuxfoundation.org/lfx/crowdfunding in a new tab (footer + navbar More menu, below About).
• Contact support — opens the Intercom messenger, using the same useIntercom().show() mechanism as the "Contact our team" button from fix(for-companies): replace broken /contact links with Intercom #174.

How

• Footer "Contact support" mirrors the For Companies CTA: useIntercom() is resolved in footer.vue's setup() with a local openIntercom() handler. The menu config stays declarative via a new intercom: true link variant.
• Navbar children gain an optional external flag so the Documentation link renders with target="_blank" + rel="noopener noreferrer" (desktop nav and mobile menu).
• Left-aligned the footer action buttons (text-left) so they line up with the anchor links — also fixes pre-existing drift on "Start a Fundraise".

Related

• Follows fix(for-companies): replace broken /contact links with Intercom #174 (Contact our team → Intercom) per Michał's request.

Checklist

• Type-check + lint clean
• No new files (license headers N/A)
• Verified in browser: links render, new-tab works, click fires Intercom show
• Diff under 1000 lines (~32 lines)

Note: clicking "Contact support" fires window.Intercom('show') correctly, but the messenger only renders on allowlisted Intercom domains — not visible on localhost (same as #174).

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR updates the frontend navigation to add a Documentation link (opening the Linux Foundation docs in a new tab) and a Contact support footer entry that opens Intercom, aligning footer behavior with the existing Intercom CTA introduced in #174.

Changes:

• Added a Documentation entry to the header “More” menu with an external flag to render target="_blank" + rel="noopener noreferrer".
• Added Documentation and Contact support entries to the footer “Platform” section, with Contact support opening Intercom via useIntercom().show().
• Extended footer link typing to support a declarative intercom: true link variant.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
frontend/app/types/footer.types.ts	Extends footer menu link union type to support an intercom: true variant.
frontend/app/config/menu/header.ts	Adds “Documentation” child item and introduces optional external flag on header children.
frontend/app/config/menu/footer.ts	Adds “Documentation” (external) and “Contact support” (Intercom) entries to footer Platform links.
frontend/app/components/shared/layout/footer.vue	Renders Intercom footer link as a button and wires it to useIntercom().show(); aligns button text styling.
frontend/app/components/shared/layout/components/mobile-menu.vue	Applies target/rel for external “More” children links in the mobile menu.
frontend/app/components/shared/layout/components/desktop-nav.vue	Applies target/rel for external “More” children links in the desktop dropdown.

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[lewisojile]

LGTM

[nunoeufrasio]

Review Feedback Addressed

Commit: e8f89d4

Changes Made

• config/menu/footer.ts: Documentation link now points to the in-app /docs route instead of the deprecated docs.linuxfoundation.org CF docs (per @mlehotskylf)
• config/menu/header.ts: More-menu Documentation entry now points to /docs; dropped the now-unused external flag (per @mlehotskylf)
• layout/components/desktop-nav.vue, mobile-menu.vue: reverted the external new-tab handling — no longer needed for an in-app link

Both Documentation links are now internal links to the in-app docs system introduced in #166. "Contact support" (Intercom) is unchanged.

Threads Resolved

2 of 2 unresolved threads addressed in this iteration.