Add a favicon and rework the Design page

Blogs had no icon at all, and browsers probing /favicon.ico ended up
rendering the 404 page. Ship a default paper & ink icon (svg + png) and
let each blog replace it from the Design page; /favicon.ico now serves
the default or redirects to the blog's own image. ICO uploads accepted.

The Design page gains colour schemes, reset to defaults, thumbnail
image pickers, jump links and a sticky save bar, plus new options:
heading font, link underline/hover, content box style and padding,
header image height, post dates and format, footer RSS toggle, menu
alignment/style/hover and sidebar width. The Menu card picks the
position with illustrated tiles and shows only the options that apply
to it, using CSS :checked rules rather than JavaScript.

All new defaults reproduce the previous look, so existing blogs are
unchanged until edited. Theme is jsonb, so no migration.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 1 insertions, 1 deletions

diff --git a/internal/web/templates/dashboard/images.html b/internal/web/templates/dashboard/images.html
index b44289e..1c64391 100644
--- a/internal/web/templates/dashboard/images.html
+++ b/internal/web/templates/dashboard/images.html
@@ -7,7 +7,7 @@
 <div class="card">
   <form method="post" action="/b/{{.Blog.Subdomain}}/images/upload" enctype="multipart/form-data">
     <input type="hidden" name="_csrf" value="{{.CSRF}}">
-    <label>Upload an image <span class="muted">(PNG, JPEG, GIF or WebP)</span><br><input type="file" name="file" accept="image/*" required></label>
+    <label>Upload an image <span class="muted">(PNG, JPEG, GIF, WebP or ICO)</span><br><input type="file" name="file" accept="image/*" required></label>
     <p class="actionrow"><button type="submit">Upload</button></p>
   </form>
 </div>