feat: phase 1 public site skeleton — layout, routes, CSS, logo pipeline

Ship base Jinja layout (header/nav/main/footer with skip link and aria-current),
mobile-first single-file CSS using the ROADMAP palette tokens, and four public
routes: /, /about, /contact, /shop. Blog index renders via a stable
PostService.list_published() stub returning [] — Phase 2 only swaps the body.
About is static placeholder copy, /contact ships an inert form plus a mailto:
link driven by ADMIN_CONTACT_EMAIL, /shop shows a "Coming soon" card.

Adds a Pillow-based scripts/generate_static_assets.py producing resized logo
PNG + WebP, multi-size favicon.ico, and a 180x180 apple-touch-icon on a cream
background. Outputs committed for a reproducible build.

Also ship docs/MANUAL_TESTING.md with per-route / responsive / a11y / static-
asset checklists, and mark Phase 1 complete in docs/ROADMAP.md.

app/templates/public/contact.html

@@ -0,0 +1,85 @@
+{#
+  Contact page — Phase 1 version.
+
+  The form is deliberately inert: no `method`, no `action`, all inputs
+  and the submit button carry the `disabled` attribute. A muted note
+  explains the form is coming soon; if `ADMIN_CONTACT_EMAIL` is set in
+  the environment we render a `mailto:` link above the form so visitors
+  still have a way to reach the farm.
+
+  Phase 5 replaces this template with a working POST handler, hCaptcha,
+  honeypot, and rate limiting.
+
+  Context:
+    - contact_email : str | None  (from settings.admin_contact_email)
+    - active_nav    : "contact"
+#}
+{% extends "public/base.html" %}
+
+{% block title %}Contact — Chicken Babies R Us{% endblock %}
+{% block meta_description %}Get in touch with Chicken Babies R Us.{% endblock %}
+
+{% block content %}
+  <article class="page-article">
+    <header class="page-article__header">
+      <h1 class="page-article__title">Get in touch</h1>
+    </header>
+
+    <p>
+      We'd love to hear from you &mdash; questions about the birds,
+      availability, or just to say hi.
+    </p>
+
+    {% if contact_email %}
+      <p class="contact-mailto">
+        The easiest way to reach us right now is email:
+        <a href="mailto:{{ contact_email }}">{{ contact_email }}</a>.
+      </p>
+    {% else %}
+      <p class="contact-mailto contact-mailto--muted">
+        A direct email address will be posted here soon.
+      </p>
+    {% endif %}
+
+    <p class="contact-form__note" role="note">
+      Secure contact form coming soon.
+    </p>
+
+    {# action="" and no method = form cannot submit. Every input is
+       disabled so screen readers and the keyboard both respect the
+       "not-yet-available" state. #}
+    <form class="contact-form" action="" aria-describedby="contact-form-note" novalidate>
+      <div class="contact-form__field">
+        <label for="contact-name">Name</label>
+        <input type="text"
+               id="contact-name"
+               name="name"
+               autocomplete="name"
+               disabled>
+      </div>
+
+      <div class="contact-form__field">
+        <label for="contact-email">Email</label>
+        <input type="email"
+               id="contact-email"
+               name="email"
+               autocomplete="email"
+               disabled>
+      </div>
+
+      <div class="contact-form__field">
+        <label for="contact-message">Message</label>
+        <textarea id="contact-message"
+                  name="message"
+                  rows="6"
+                  disabled></textarea>
+      </div>
+
+      <div class="contact-form__actions">
+        <button type="submit" class="btn btn--primary" disabled>
+          Send message
+        </button>
+      </div>
+    </form>
+  </article>
+{% endblock %}