Move brand, design system and compare to /internal; make footers consistent

[jeanluis-ferrosa]

What this does

Two things, in one PR because the second is forced by the first touching the homepage footer.

1. Move the internal pages to /internal

Ben, Aug 18: "move brand and design system and the battle cards and everything else to, like, slash internal. It's available publicly, so you can actually share them if somebody asks, but it's not linked and it's not in people's face."

From	To
docs/brand.html	docs/internal/brand.html
docs/design-system.html	docs/internal/design-system.html
docs/ferrosa-memory/compare.html	docs/internal/compare.html

Nothing is deleted. All three stay publicly reachable at their new addresses.

The old addresses now 404 — this is deliberate. /brand.html and /design-system.html are not forwarded. Jean-Luis's call: nothing outside the site links to them. ⚠️ The Drive brand folder points at /brand.html and needs updating separately.

Links removed (8): Brand + Design system from the homepage footer; the Compare tab from all five Memory nav bars; the two in-body Compare buttons on the Memory overview and How it works.

Deliberately not done: the copy around those two removed buttons was left as-is. Both sections are queued for their own pass; rewriting now would be thrown away. The "How it works" heading still reads "See it as tools, and against the alternatives" with only one button under it — known, tracked.

The two Memory forwarding stubs (ferrosa-memory/brand.html, ferrosa-memory/design-system.html) were repointed at /internal rather than left dangling.

No /internal index page — the ask was to move pages, not add one.

No page matched "battle cards" — no such page exists in the repo.

2. Footers, now consistent across all nine pages

Two separate defects, found while removing the two homepage footer links:

a. The homepage lost the community footer in #23. #10 had deliberately pushed the homepage's community footer out to the seven product pages, making it the standard; #23 then replaced only the homepage's with a slimmer one-row footer. Restored to the standard.

b. .legacy-doc h2 was beating .community-title. "Join our community" is an <h2>. The ported layer carries .legacy-doc h2 { font-size; margin-top; border-top; padding-top } at (0,1,1), which out-specifies .community-title at (0,1,0). On the two pages carrying .legacy-doc — forge/index.html and ferrosa-memory/getting-started.html — the heading rendered at 26px with a divider rule and ~80px of stacked space above it, making the footer 258px tall against 119px everywhere else.

Restated after the ported block rather than editing it, per the standing rule in this repo. Same treatment for the missing border-top on the homepage, whose body carries neither .product-page nor .legacy-doc.

Footer link row is now Memory / Database / Forge / Docs on every page. GitHub stays as the icon it already is in the community band, rather than duplicating as a text link.

Measured at 1280px, all nine pages: 119px tall, 1px top border, 3 social icons, identical link row.

Note for Ben

design.config.json has two path corrections — it names design-system.html as its colour source and compare.html as one of the nine measured pages, so the move forces them. Flagging since that file is normally yours.

⚠️ README.md now points at the old location of the design system in two places (the design-tokens note and the check-contrast.mjs row). Left alone — your repo, your docs.

Checks

Gate	Result
check-site.py	pass
check-contrast.mjs	pass — 183 combinations, 0 below AA
measure-anatomy.mjs	pass — anatomy consistent
find-empty-bands.mjs	pass — no empty band over 200px
build-docs-nav.py	no drift
git diff --check	clean

Footers were verified by measuring computed styles on all nine pages, since no gate covers footers.