homepage: live model info on the fleet cards, user docs page at /docs

- services.json: frank-large/medium/small move from admin-only to the user
  page with current descriptions (halogen w4b iGPU; 35:30 layer-split MTP
  27B on the R9700s; Gemma4-12B QAT vision path on the 3090) and docs
  links to /docs#models
- docs.html: static user documentation (access chain, model guide, media
  how-tos, troubleshooting); served at /docs via the post-auth homepage
  listener; shipped by deploy_homepage; footer + index link to it
- tests: pages seam asserts the docs contract (page, link, Caddy route,
  deployer copy)
- vault: Homepage.md synced (docs landing shipped, cards reclassified)

tests/homepage_pages.bats

@@ -48,3 +48,16 @@ setup() {
     grep -q '<base href="/">' "$BASE/index.html"
     grep -q '<base href="/">' "$BASE/admin.html"
 }
+
+@test "the user docs page exists and is reachable from the service pages" {
+    [ -f "$BASE/docs.html" ]
+    grep -q '<a href="/docs">docs</a>' "$BASE/index.html"
+    grep -q 'id="models"' "$BASE/docs.html"
+    grep -q '<base href="/">' "$BASE/docs.html"
+    grep -q 'style.css' "$BASE/docs.html"
+}
+
+@test "the docs route is served and shipped" {
+    grep -qE 'try_files /docs\.html' "$REPO_ROOT/dankclaw/Caddyfile"
+    grep -q 'shared/homepage/docs.html' "$REPO_ROOT/scripts/deploy-remote.sh"
+}