Add post summaries, featured images and a page outro

Recreating gizmolab.net as a blog showed three things the design system
could not express, all of them ordinary blog features:

- Listings can show a summary and a "Read more" link instead of the whole
  post (theme.list_style). The summary is the source up to <!--more-->;
  without the marker a Markdown post is cut at a block boundary after 70
  words (never inside a code fence) and an HTML post is shown whole, since
  cutting hand-written markup blind would leave tags open. Computed at
  render time (Post.Excerpt/HasMore), nothing new is stored.
- A post can carry a featured image (posts.image, a library file that is
  unset when the file is deleted): a thumbnail floated beside the entry on
  listings, and on the post page above or below the text, or not at all,
  as theme.post_image says. The picker is the design page's imagepick; its
  library panel moves out of design.html into partials/imagelib.html so
  both forms share it — which also removes a stale pickAction call the
  design form's click handler would have hit.
- A page can have a closing text after its posts (pages.outro_md/html), in
  the intro's format: the per-page counterpart of the blog-wide "after the
  posts" module, for a home page that ends in a site map or a widget. The
  editor partial takes formatof to share another editor's Format row, and
  its upload field is now <name>_file so two editors fit in one form.

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

1 files changed, 7 insertions, 6 deletions

diff --git a/internal/web/templates/partials/imagepick.html b/internal/web/templates/partials/imagepick.html
index 47c2146..ed9368c 100644
--- a/internal/web/templates/partials/imagepick.html
+++ b/internal/web/templates/partials/imagepick.html
@@ -1,19 +1,20 @@
-{{/* One image field of the design form. The select lists the recent images
-     (plus the chosen one) so it works without the script; with it the select is
-     hidden and "Choose from library…" opens the shared panel at the end of
-     design.html, which fetches the library page by page. */}}
+{{/* One image field of a form (the design page, a post's featured image).
+     The select lists the recent images (plus the chosen one) so it works
+     without the script; with it the select is hidden and "Choose from
+     library…" opens the form's imagelib panel, which fetches the library
+     page by page and marks the pickers with .js. */}}
 {{define "imagepick"}}{{$cur := .current}}<div class="imagepick" data-name="{{.name}}">
   <label>{{.label}}</label>
   {{if .hint}}<p class="muted small">{{.hint}}</p>{{end}}
   <div class="pickrow">
     <span class="preview">{{if $cur}}<img src="/b/{{.sub}}/media/{{$cur}}" alt="">{{else}}<span class="swatch">&times;</span>{{end}}</span>
     <span class="pickctl">
-      <select name="{{.name}}" class="nojs">
+      <select name="{{.name}}" class="ip-nojs">
         <option value="none"{{if not $cur}} selected{{end}}>{{t "None"}}</option>
         {{range .images}}<option value="{{.ID}}"{{if eq .ID.String $cur}} selected{{end}}>{{.Filename}}</option>{{end}}
         {{if and $cur (not (index .names $cur))}}<option value="{{$cur}}" selected>{{t "Current image"}}</option>{{end}}
       </select>
-      <span class="jsonly"><button type="button" class="secondary small" data-pick="open">{{t "Choose from library…"}}</button> <button type="button" class="secondary small" data-pick="clear">{{t "None"}}</button></span>
+      <span class="ip-jsonly"><button type="button" class="secondary small" data-pick="open">{{t "Choose from library…"}}</button> <button type="button" class="secondary small" data-pick="clear">{{t "None"}}</button></span>
       <label class="upload">{{t "…or upload a new one"}}<br><input type="file" name="{{.name}}_file" accept="{{if .accept}}{{.accept}}{{else}}image/*{{end}}"></label>
     </span>
   </div>