Add nav/footer, contact form, privacy/terms drafts, first course landing page

- baseof.html: proper header/nav/footer, CSS custom properties for
  light/dark, button and form component styles — no external theme
  dependency, avoiding the submodule/version churn from the earlier
  PaperMod attempt.
- Contact page: real form (honeypot spam protection) posting to the eec
  service's new /contact endpoint, replacing the plain mailto CTA.
- Privacy Policy and Terms drafts — grounded in what's actually true here
  (self-hosted mail/course infra, no third-party trackers), flagged as
  drafts pending review.
- courses/ section with a generic single template driven by front matter
  (eec_slug, pitch) and the first course, Find Your Right Readers —
  landing page only; the actual course content isn't authored in
  eec-courses yet, so enrolling will 404 until that's written.
- Fixed hugo.toml baseURL (was www.reground.org, but Caddy's canonical
  host is the bare domain — www redirects to it, not the other way).

hugo.toml

@@ -1,4 +1,4 @@
-baseURL = "https://www.reground.org/"
+baseURL = "https://reground.org/"
 locale = "en-US"
 title = "ReGround"
 
@@ -12,7 +12,29 @@ disableKinds = ["taxonomy", "term"]
   env = "production"
   description = "ReGround helps fiction authors find the readers who were always meant to find them."
   author = "Will Estes"
+  eec_base_url = "https://eec.reground.org"
 
-# Menu is intentionally minimal for now — add Blog/About/Contact
-# entries here as those sections come online.
-[menu]
+[[menu.main]]
+  name = "Courses"
+  url = "/courses/"
+  weight = 10
+
+[[menu.main]]
+  name = "Contact"
+  url = "/contact/"
+  weight = 20
+
+[[menu.footer]]
+  name = "Contact"
+  url = "/contact/"
+  weight = 10
+
+[[menu.footer]]
+  name = "Privacy"
+  url = "/privacy/"
+  weight = 20
+
+[[menu.footer]]
+  name = "Terms"
+  url = "/terms/"
+  weight = 30